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Rainfall/ Precipitation in Seattle, Washington, Usa

  • Seattle, Washington bags an average of 965.4 mm (38 in) of rainfall per year, or 80.5 mm (3.2 in) per month.
  • On average there are 150 days per year with more than 0.1 mm (0.004 in) of rainfall (precipitation) or 12.5 days with a quantity of rain, sleet, snow etc. per month.
  • The driest weather is in July when an average of 21.6 mm (0.9 in) of rainfall (precipitation) occurs.
  • The wettest weather is in December when an average of 152.4 mm (6 in) of rainfall (precipitation) occurs.

Precipitation Table

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
rainfall iconAverage Precipitation mm (in) 135.9 (5.35) 102.4 (4) 95.8 (3.8) 63.8 (2.5) 46.7 (1.8) 40.4 (1.6) 21.6 (0.9) 31 (1.2) 49.3 (1.9) 82.6 (3.3) 143.5 (5.6) 152.4 (6) 965.4 (38)
rainwater catchment iconPrecipitation Litres/m (Gallons/ft) 135.9 (3.33) 102.4 (2.51) 95.8 (2.35) 63.8 (1.56) 46.7 (1.15) 40.4 (0.99) 21.6 (0.53) 31 (0.76) 49.3 (1.21) 82.6 (2.03) 143.5 (3.52) 152.4 (3.74) 965.4 (23.68)
rain days iconNumber of Wet Days (probability of rain on a day) 19 (61%) 15 (53%) 16 (52%) 12 (40%) 11 (35%) 9 (30%) 5 (16%) 5 (16%) 8 (27%) 14 (45%) 17 (57%) 19 (61%)   150 (41%)
sunny or cloudy iconPercentage of Sunny (Cloudy) Daylight Hours 23 (77) 33 (67) 45 (55) 50 (50) 51 (49) 48 (52) 66 (34) 58 (42) 51 (49) 42 (58) 30 (70) 23 (77)   47 (53)





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Precipitation Nearby Seattle, Washington, Usa

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