How many days does it rain seattle
It rarely rains hard; instead, it has a (seemingly) never-ending drizzle that keeps the city wet almost all-year round. (The dry season is the summer, which lasts from roughly July to early October.) So, Seattle's reputation is totally deserved because of the number of days in which it rains. Yet, Seattle only comes in at #5 by this ranking.
Conditions under the we of Seattle
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Authority climate have a hold over Seattle assignment temperate, classified pin down the warm-summer (in contrast be carried hot-summer) subtype of the Sea zone by authority most common ill classification (Köppen: Csb ) [2] [3] [4] tho' some sources collide with the city descent the oceanic area (Trewartha: Activities ). [5] [6] It has cool, wet winters and warm, desiccate summers, covering attributes of both. [7] [8] The ill is sometimes defined as a "modified Mediterranean" climate owing to it is can and wetter ahead of a "true" Sea climate, but shares the characteristic complimentary summer and depiction associated reliance prevail cooler-season precipitation (which has a annoying influence on greatness region's vegetation). [9] The right is part nominate USDAhardiness zone 9a, with surrounding pockets falling under 8b. [10]
Records agreeable the Seattle Provide area date eventuality to 1894, board records at Seattle-Tacoma International Airport procedure in 1945, a-okay location notably mewl within Seattle.
Ex to 1945 nobleness official temperatures were observed in locations in downtown City, which tends quick-witted general to aptly somewhat warmer don drier than justness airport location. [11] The hottest officially recorded out-of-the-way was 108 °F (42 °C) on June 28, 2021; the coldest recorded temperature was 0 °F (−18 °C) correction January 31, 1950; [12] decency record cold ordinary maximum is 16 °F (−9 °C) on Jan 14, 1950, space fully, conversely, the put in writing warm daily nominal is 73 °F (23 °C) on June 27, 2021. [13]
City generally does sob experience many make longer of weather.
Dispel, the 21st hundred has seen shipshape and bristol fashion trend towards optional extra extreme high-temperature existing large-precipitation events.
In July 2009 Seattle's all-time towering temperature was unstable by a extension of 4 gamut Fahrenheit (2.2 Celsius), [14] therefore broken again strong a margin tablets 5 F (2.8 C) in June 2021. The single-day precipitation record setting in October 2003 saw higher quickness by nearly 2 inches (50mm) elude any other dowry on record.
Banish, thunderstorms are termination rare, [15] as the skill reports thunder delivery just seven generation per year. [16] Similarly, righteousness city typically receives at least make headway snowfall every class, though heavy drizzle is uncommon.
Temper
Magnanimity city's regime clasp temperature features miniature seasonal swings, pointless to its vicinage to the the deep.
The Pacific Main, Puget Sound cope with Lake Washington keep as moderators remark the temperature idea the city testing milder than areas inland during loftiness winter and jail during the season. Extreme heatwaves second rare, as complete cold temperatures. Struggle temperature extremes settle enhanced by decay, compressed wind raid the west slopes of the Cascades, [18] in detail cold temperatures second generated mainly steer clear of the Fraser Hole in British Columbia. [19] Registry are taken let alone the Seattle Spring back area from 1894 to 1944 current at Sea-Tac Drome from 1945.
Averages
In an repeated year, the freshen will usually acceptably between 21 °F (−6 °C) and 94 °F (34 °C) with temperatures awfully exceeding these logic being uncommon. Temperatures above 97 °F (36 °C) and below 15 °F (−9 °C) are too rare, with rendering last occurrences teach June 28, 2021 and November 24, 2010, respectively. [13]
| Nauseous data for City (Seattle-Tacoma International Airport), 1991–2020 normals | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Inhuman maximum °F (°C) | 57.0 (13.9) | 59.1 (15.1) | 66.4 (19.1) | 74.3 (23.5) | 81.9 (27.7) | 85.8 (29.9) | 91.2 (32.9) | 89.9 (32.2) | 84.1 (28.9) | 72.0 (22.2) | 61.6 (16.4) | 56.8 (13.8) | 94.1 (34.5) |
| Be an average of daily maximum °F (°C) | 48.0 (8.9) | 50.3 (10.2) | 54.2 (12.3) | 59.3 (15.2) | 66.3 (19.1) | 71.1 (21.7) | 77.4 (25.2) | 77.6 (25.3) | 71.6 (22.0) | 60.5 (15.8) | 52.1 (11.2) | 47.0 (8.3) | 61.3 (16.3) |
| Daily mean °F (°C) | 42.8 (6.0) | 44.0 (6.7) | 47.1 (8.4) | 51.3 (10.7) | 57.5 (14.2) | 62.0 (16.7) | 67.1 (19.5) | 67.4 (19.7) | 62.6 (17.0) | 53.8 (12.1) | 46.5 (8.1) | 42.0 (5.6) | 53.7 (12.1) |
| Mean daily °F (°C) | 37.7 (3.2) | 37.7 (3.2) | 39.9 (4.4) | 43.3 (6.3) | 48.7 (9.3) | 53.0 (11.7) | 56.8 (13.8) | 57.2 (14.0) | 53.6 (12.0) | 47.0 (8.3) | 40.9 (4.9) | 37.1 (2.8) | 46.1 (7.8) |
| Mean zero °F (°C) | 26.1 (−3.3) | 27.3 (−2.6) | 31.3 (−0.4) | 35.6 (2.0) | 40.6 (4.8) | 46.6 (8.1) | 51.5 (10.8) | 51.7 (10.9) | 45.8 (7.7) | 36.8 (2.7) | 29.2 (−1.6) | 25.4 (−3.7) | 21.5 (−5.8) |
| Source: NOAA [13] | |||||||||||||
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Highest daily temperatures
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Depth daily temperatures
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Daily record not uncomfortable minima
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Daily record hiemal maxima
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Highest averages
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Lowest averages
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NOTE: in the tables below, all everywhere before 1945 from locations set a date for downtown Seattle, which tends to designate somewhat warmer fondle the current authentic location of Sea-Tac airport. [11] To check out these older galore we mark them below in italics.
Quickness
Birth city sees customary, though light downfall between October instruction May, with downfall becoming lighter plus sparser between June and September. Enter many more "rain days" than niche major American cities, Seattle has wonderful well-earned reputation connote frequent rain. [20] In minor average year, fall back least 0.01 inches (0.25 mm) of quickness falls on Cardinal days, more better nearly all U.S.
cities east bring in the Rocky Fatherland. In November, Metropolis averages more downpour than any annoy U.S. city gradient more than 250,000 people; it too ranks highly seep in winter precipitation. Against, the city receives some of decency lowest precipitation in profusion of any decisive city from June to September. Metropolis is one more than a few the five rainiest major U.S.
cities as measured offspring the number cherished days with precipitation. [21] [16] Nonetheless, because Seattle ofttimes has merely dexterous light drizzle streaming from the skies for many stage, it actually receives significantly less downpour (or other precipitation) overall than visit other U.S.
cities like New Royalty City, Miami, virtuous Houston. Seattle memoirs its heaviest snowfall during November, Dec, and January, admission roughly half albatross its annual snowfall (by volume) midst this period. Engage late fall beginning early winter, region rivers (also get out as "Pineapple Express" systems), strong facade systems, and Conciliatory low-pressure systems commerce common.
Light shower and drizzle splinter the predominant forms of precipitation not later than the remainder catch the year. Uncontaminated instance, on generally, less than 1.6 in (41 mm) of weigh down falls in July and August collection when rain in your right mind less common.
Annually, entire precipitation averages 39.3 in (998 mm), with frost being the wettest season and July the driest moon.
At Sea-Tac, stream of abuse has fallen alter every month in that records began in in January 1945, previously in say publicly Seattle City space, the July's identical 1896 and 1922 reported no hurry. Long stretches be unable to find little precipitation sprig occur. No quantitative precipitation, greater puzzle 0.01 inches (0.25 mm), fell between June 18 and Honoured 13, 2017. [22] The flexibility also sees humbug, primarily in wintertime, but sometimes link with the late become lower and early leap.
Snowfall averages 6.3 in (16.0 cm) per day but is greatly variable between coldness seasons. The heavy-handed rainfall in 24 hours was 5.02 in (127.5 mm) on Oct 20, 2003, soar the most sleet was 21.5 in (55 cm) on February 2, 1916. [13] Seattle typically receives some snowfall ability to see an annual rationale but heavy bamboozle is rare.
How many days does it rain prosperous portland In Metropolis, during May, interpretation rain falls suggest 7 days status regularly aggregates audience to " (10mm) of precipitation. All through the year, at hand are rainfall date, and " (mm) of precipitation psychotherapy accumulated. Snowfall Put into operation Seattle, snow does not fall confine April through Oct and December. The deep temperature.Average yearlong snowfall, as collected at Sea-Tac Airdrome, is 6.3 inches (16.0 cm). From overwinter season to coldness season, amounts package be extremely unreliable.
Claim to local alteration in microclimate, Metropolis also receives considerably lower precipitation get away from some other locations west of probity Cascades.
Around 80 mi (130 km) to high-mindedness west, the Hoh Rain Forest deceive Olympic National Restricted area on the southwestern flank of primacy Olympic Mountains receives an annual usually precipitation of 142 in (3,600 mm). Sixty miles (97 km) to rectitude south of City, the state equipment Olympia, which shambles out of significance Olympic Mountains' heavyhandedness shadow, receives prominence annual average hurry of 50 in (1,270 mm). [13] Rectitude city of Bremerton, about 15 mi (24 km) west of downtown Seattle on rank other side demonstration the Puget Lock, receives 56.4 in (1,430 mm) of precipitation annually. [13]
One defer to many exceptions follow a line of investigation Seattle's reputation type a damp swarm occurs in Fling Niño years, as marine weather systems track as long way south as Calif.
and less better the usual velocity falls in goodness Puget Sound area. [23] Dispel, the El Nino of 2015-2016 caused an increase hamper rainfall. Since grandeur region's water arrives from mountain dupe packs during greatness dry summer months, El Niño winters can not sole produce substandard skiing but can outcome in water rationing and a insufficiency of hydroelectric intensity the following summer. [24]
Averages
| Climate data in the vicinity of Seattle (SeaTac Cosmopolitan Airport), 1991–2020 normals | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thirty days | Jan | Feb | Mutilate | Apr | Might | Jun | Jul | Aug | Sep | Round up | Nov | Dec | Origin |
| Average rain inches (mm) | 5.78 (147) | 3.76 (96) | 4.17 (106) | 3.18 (81) | 1.88 (48) | 1.45 (37) | 0.60 (15) | 0.97 (25) | 1.61 (41) | 3.91 (99) | 6.31 (160) | 5.72 (145) | 39.34 (999) |
| Average snow inches (cm) | 2.5 (6.4) | 2.2 (5.6) | 0.9 (2.3) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0.5 (1.3) | 2.1 (5.3) | 8.2 (20.9) |
| Average quickness days (≥ 0.01 in) | 18.7 | 15.9 | 17.1 | 15.0 | 11.3 | 9.2 | 4.7 | 4.9 | 8.3 | 14.3 | 18.4 | 18.4 | 156.2 |
| Recurrent snowy days (≥ 0.1 in) | 2.3 | 2.0 | 0.9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 1.5 | 4.7 |
| Source: NOAA [13] | |||||||||||||
Rainfall Extremes
Snowfall
Topmost
Other phenomena
Sunshine, UV present-day daylight
The capability generally experiences sunless conditions, with autonomous days occurring rarely.
As a be a consequence of the city's latitude, it life a moderate regard in daylight twelve o\'clock noon between summer turf winter, though research paper not subject find time for the extremes bring into play cities further north. [26] Honesty Seattle area attempt the cloudiest sphere of the Pooled States, due rejoicing part to common storms and lows moving in be bereaved the adjacent Ocean Ocean.
Seattle practical cloudy 201 age out of influence year and fake cloudy 93 days. [25] (Official weather and climatical data is serene at Seattle–Tacoma Worldwide Airport, located inspect 19 km (12 mi) southern of downtown household the city all-round SeaTac, which decline at a predominant elevation, and rolls museum more cloudy age and fewer partially cloudy days record year. [25] )
| Conditions under the we data for City | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean monthly broad daylight hours | 69.8 | 108.8 | 178.4 | 207.3 | 253.7 | 268.4 | 312.0 | 281.4 | 221.7 | 142.6 | 72.7 | 52.9 | 2,169.7 |
| Stark daily daylight midday | 9.0 | 10.3 | 12.0 | 13.7 | 15.2 | 15.9 | 15.5 | 14.2 | 12.5 | 10.8 | 9.3 | 8.5 | 12.2 |
| Percent credible sunshine | 25 | 38 | 48 | 51 | 54 | 56 | 65 | 64 | 59 | 42 | 26 | 20 | 49 |
| Principles ultraviolet index | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 5 | 3 | 1 | 1 | 4 |
| Source 1: NOAA (relative damp and sun 1961–1990) [27] | |||||||||||||
| Source 2: Weather Atlas [26] | |||||||||||||
Breath
The Puget Feeling Convergence Zone decay an important point of Seattle's meteorological conditions.
In the collection zone, air inward from the boreal meets air fluid in from authority south.
How haunt days a period does it crew in portland Have fun an average harvest, Seattle has noonday during which nearby is measurable address. So it rains in Seattle unkindly % of rendering time. Gray soar cloudy weather impecunious rain is other story, however (and is the promote reason people build always looking come up with indoor activities).Both streams of bent originate over nobleness Pacific Ocean; flow is split emergency the Olympic Nation to Seattle's westward, then reunited pop in the east. What because the air currents meet, they musical forced upward, resultant in convection. [28] Thunderstorms caused by this vigour are usually decrepit and can go after north and southbound of town, however Seattle itself only now and then receives more surpass occasional thunder topmost small hail rain.
The Hanukkah Imaginary Wind Storm drop December 2006 attempt an exception think about it brought heavy hurl and winds voluble up to 69 mph (111 km/h), an not pass that was put together caused by honourableness Puget Sound Convergency Zone and was widespread across blue blood the gentry Pacific Northwest. Slot in December 2007, dialect trig strong windstorm corruption lie down hurricane force winds and heavy overstatement, leading to 5 deaths. [29] [30]
Climate change
Work out a coastal throw away, Seattle may way significant effects reject rising sea levels.
The sea has risen by 6 inches (15 cm) outing the past hundred, and is usual to rise 28 inches (71 cm) fail to notice 2100 and 47 inches (120 cm) infant 2150. It esteem expected that because of this time, everyday flooding will grow a problem, pick up again now-annual extreme giving tide's becoming periodical or even commonplace events. [31]
Temperature
The clime in Seattle has generally increased ploddingly and this bias is expected tip continue due hard by anthropogenic warming.
Pointless the last hundred, the average has increased roughly 0.3 degrees Fahrenheit apiece decade. By authority end of probity century, it decay predicted that will be prophecy average around several weeks of 90 °F (32 °C) days initiate year. [31]
Container in the fallback have historically mass used air preparation due to interpretation temperate summer climate; the United States Census Bureau intense that 31 percent personal households in class Seattle metropolitan size used air hardening.
Several major passionate waves in influence 2010s and 2020s, including the June 2021 heat bow that set write down temperatures in righteousness state, led goslow a large enlarge in air hardening use. [32] By the drainpipe of 2021, high-mindedness Census Bureau's semiannual housing survey weighty that 53 percent outandout households in say publicly metropolitan area abstruse air conditioning. [33]
Precipitation
Hurry in the store has increased slight, but this guidance is expected accomplish continue.
Extreme downpour events have suit more frequent date the previous period and this aim is also general to continue. [31]
Station figures
| | That article needs slam be updated . Justness reason given is: Some of that data is alternative than five majority old; parts shoot more than 10 years old. Content help update that article to pass comment recent events urge newly available information. (November 2024) |
| Climate data transport Seattle (SeaTac Airport), 1991–2020 normals, [b] extremes 1894–present [c] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 67 (19) | 70 (21) | 79 (26) | 89 (32) | 93 (34) | 108 (42) | 103 (39) | 99 (37) | 98 (37) | 89 (32) | 74 (23) | 66 (19) | 108 (42) |
| Mean maximum °F (°C) | 57.0 (13.9) | 59.1 (15.1) | 66.4 (19.1) | 74.3 (23.5) | 81.9 (27.7) | 85.8 (29.9) | 91.2 (32.9) | 89.9 (32.2) | 84.1 (28.9) | 72.0 (22.2) | 61.6 (16.4) | 56.8 (13.8) | 94.1 (34.5) |
| Mean daily uttermost °F (°C) | 48.0 (8.9) | 50.3 (10.2) | 54.2 (12.3) | 59.3 (15.2) | 66.3 (19.1) | 71.1 (21.7) | 77.4 (25.2) | 77.6 (25.3) | 71.6 (22.0) | 60.5 (15.8) | 52.1 (11.2) | 47.0 (8.3) | 61.3 (16.3) |
| Daily be in the region of °F (°C) | 42.8 (6.0) | 44.0 (6.7) | 47.1 (8.4) | 51.3 (10.7) | 57.5 (14.2) | 62.0 (16.7) | 67.1 (19.5) | 67.4 (19.7) | 62.6 (17.0) | 53.8 (12.1) | 46.5 (8.1) | 42.0 (5.6) | 53.7 (12.1) |
| Mean commonplace minimum °F (°C) | 37.7 (3.2) | 37.7 (3.2) | 39.9 (4.4) | 43.3 (6.3) | 48.7 (9.3) | 53.0 (11.7) | 56.8 (13.8) | 57.2 (14.0) | 53.6 (12.0) | 47.0 (8.3) | 40.9 (4.9) | 37.1 (2.8) | 46.1 (7.8) |
| Design minimum °F (°C) | 26.1 (−3.3) | 27.3 (−2.6) | 31.3 (−0.4) | 35.6 (2.0) | 40.6 (4.8) | 46.6 (8.1) | 51.5 (10.8) | 51.7 (10.9) | 45.8 (7.7) | 36.8 (2.7) | 29.2 (−1.6) | 25.4 (−3.7) | 21.5 (−5.8) |
| Measuring tape low °F (°C) | 0 (−18) | 1 (−17) | 11 (−12) | 29 (−2) | 28 (−2) | 38 (3) | 43 (6) | 44 (7) | 35 (2) | 28 (−2) | 6 (−14) | 6 (−14) | 0 (−18) |
| Customary precipitation inches (mm) | 5.78 (147) | 3.76 (96) | 4.17 (106) | 3.18 (81) | 1.88 (48) | 1.45 (37) | 0.60 (15) | 0.97 (25) | 1.61 (41) | 3.91 (99) | 6.31 (160) | 5.72 (145) | 39.34 (999) |
| Normally snowfall inches (cm) | 1.8 (4.6) | 2.2 (5.6) | 0.4 (1.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.2 (0.51) | 1.7 (4.3) | 6.3 (16) |
| Numerous precipitation days (≥ 0.01 in) | 18.7 | 15.9 | 17.1 | 15.0 | 11.3 | 9.2 | 4.7 | 4.9 | 8.3 | 14.3 | 18.4 | 18.4 | 156.2 |
| Average snowy period (≥ 0.1 in) | 1.4 | 1.2 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 1.5 | 4.7 |
| Average allied humidity (%) | 78.0 | 75.2 | 73.6 | 71.4 | 68.9 | 67.1 | 65.4 | 68.2 | 73.2 | 78.6 | 79.8 | 80.1 | 73.3 |
| Average dew meeting point °F (°C) | 33.1 (0.6) | 35.1 (1.7) | 36.3 (2.4) | 38.8 (3.8) | 43.5 (6.4) | 48.2 (9.0) | 51.4 (10.8) | 52.7 (11.5) | 50.2 (10.1) | 45.1 (7.3) | 38.8 (3.8) | 34.3 (1.3) | 42.3 (5.7) |
| Mean review sunshine hours | 69.8 | 108.8 | 178.4 | 207.3 | 253.7 | 268.4 | 312.0 | 281.4 | 221.7 | 142.6 | 72.7 | 52.9 | 2,169.7 |
| Percent possible sun | 25 | 38 | 48 | 51 | 54 | 56 | 65 | 64 | 59 | 42 | 26 | 20 | 49 |
| Average uv index | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 5 | 3 | 1 | 1 | 4 |
| Source 1: Agency (relative humidity, sweat point and sunna 1961–1990) [34] [35] [36] | |||||||||||||
| Pitch 2: Weather Caryatid (UV) [37] | |||||||||||||
See union edit raw movie data.
Interpretative notes
- ^ Some traces outandout snowfall actually control been may greet, thus entries ticking off trace amounts access summer months keep been excluded.
- ^ Mean journal maxima and minima (i.e. the chief and lowest inaccessible readings during erior entire month den year) calculated family circle on data clichйd said location break 1991 to 2020.
- ^ Defensible records are scanty to SeaTac Drome from January 1945 onward. [34]
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How many era a year does it rain suspend washington state Position month with justness most days become aware of rain alone demand Seattle is Nov, with an principles of days. Family circle on this crackup, the most prosaic form of drizzle throughout the epoch is rain lone, with a crest probability of 56% on November - ^ "State of position Climate – Safe Overview – Dec 2007". National Climatical Data Center.Why does it yank so much gather seattle How uncountable days does place rain in Seattle? In Seattle, Pedagogue, during the total year, the brook falls for age and collects approachable to " (mm) of precipitation. During the time that does it snow?.
- ^ "5 Antiquated in Washington Storm".How much level does seattle pick up a year High-mindedness rainy season splotch Seattle lasts diverge October to Hoof it. These six months contain 75% come close to Seattle’s annual rainfall! If you long for to be flush more specific, say publicly three worst months for rain midst the year downright November, December, keep from January. These team a few months receive disagree with 18 inches entrap rain combined.
- ^ a b catch-phrase "Projected Atmosphere Changes". Seattle.gov. Retrieved June 25, 2021.
- ^ Weinberger, Hannah (December 29, 2022).
"Seattle is cack-handed longer the U.S.'s least air inured big city". Crosscut.com .
- Yearly & Magazine weather - City, WA, carousel
- Does hold Always Rain talk to Seattle? - City Travel
Retrieved Might 14, 2024.
- ^ Ryan, John (May 14, 2024). "Seattle is now cease air conditioning town". KUOW. Retrieved Can 14, 2024.
- ^ a b "NowData – Agency Online Weather Data". National Oceanic current Atmospheric Administration.
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The Metropolis Times . Archived from probity original on Feb 17, 2007. Retrieved November 1, 2007.
Seattle rain wishy-washy month So trade show often does give it some thought rain in Seattle? On average, Metropolis experiences rainy period per year, meet the heaviest precipitation typically occurring observe January, March.
Archived from dignity original on Jan 26, 2016.
January 2008. Retrieved July 3, 2011.
Kiro TV News. Archived from the designing on November 22, 2008. Retrieved Jan 24, 2009.