Seattle September Weather Averages

Washington, United States of America

September Weather Averages for Seattle

High Temp22°C71°F
Low Temp12°C53°F
Avg Temp16°C61°F
Sunshine Hours201 hours 
Rainfall73.43 mm2.89 In
Rain days6 days 
Pressure1016 mb30 In

 

Seattle September Averages Year by Year

YearHigh TempLow TempAvg TempSunshine HoursRainfallRain daysPressure
200922°C / 72°F11°C / 53°F16°C / 61°F271 hours79.20 mm / 3.12 In5 days1017 mb / 31 In
201020°C / 68°F11°C / 53°F15°C / 59°F141 hours123.50 mm / 4.86 In12 days1015 mb / 30 In
201124°C / 75°F12°C / 54°F17°C / 63°F280 hours46.70 mm / 1.84 In5 days1017 mb / 31 In
201223°C / 74°F11°C / 52°F16°C / 62°F320 hours9.20 mm / 0.36 In1 days1019 mb / 31 In
201321°C / 70°F12°C / 54°F16°C / 61°F210 hours187.50 mm / 7.38 In10 days1012 mb / 30 In
201423°C / 73°F12°C / 54°F17°C / 63°F232 hours67.30 mm / 2.65 In5 days1015 mb / 30 In
201520°C / 68°F11°C / 51°F15°C / 59°F187 hours50.60 mm / 1.99 In8 days1016 mb / 30 In
201620°C / 68°F11°C / 51°F15°C / 59°F212 hours73.50 mm / 2.89 In5 days1019 mb / 31 In
201723°C / 74°F13°C / 55°F18°C / 64°F226 hours73.30 mm / 2.89 In7 days1016 mb / 30 In
201821°C / 70°F11°C / 52°F16°C / 60°F196 hours59.70 mm / 2.35 In4 days1017 mb / 30 In
201920°C / 68°F12°C / 53°F16°C / 60°F132 hours141.00 mm / 5.55 In11 days1015 mb / 30 In
202025°C / 77°F14°C / 57°F19°C / 67°F226 hours110.40 mm / 4.35 In6 days1017 mb / 30 In
202121°C / 70°F11°C / 52°F16°C / 60°F161 hours112.98 mm / 4.45 In9 days1016 mb / 30 In
202224°C / 76°F12°C / 54°F18°C / 64°F234 hours7.90 mm / 0.31 In0 days1015 mb / 30 In
202322°C / 71°F10°C / 50°F15°C / 59°F164 hours79.95 mm / 3.15 In5 days1016 mb / 30 In
202421°C / 70°F12°C / 54°F16°C / 61°F138 hours20.04 mm / 0.79 In2 days1016 mb / 30 In
202522°C / 72°F14°C / 57°F17°C / 63°F141 hours31.10 mm / 1.22 In4 days1016 mb / 30 In
202620°C / 68°F12°C / 53°F15°C / 60°F140 hours47.80 mm / 1.88 In7 days1016 mb / 30 In

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Weather history near Seattle

Region

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Seattle weather history: common questions

How far back does Seattle weather history go?

Hourly historical weather is available from 1 January 2009. Choose a date above, or pick a month at the top of the page for long-term averages.

Can I download Seattle historical weather as a file?

Yes. Buy historical weather data as daily or hourly CSV, yearly monthly averages or monthly climate averages. A free sample download is available.

Is there an API for historical weather?

Yes. The WeatherAPI.com History API returns hourly weather for any past date from 2010, as JSON or XML. Get a free API key.

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