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Jul 18, 2022 · The average high temperature in September is 69°F, and the average low is 50°F. These fall temperatures are refreshing for those living with higher temperatures throughout the year. For those who live in colder environments, this will be a great break from the frigid temperatures.
- Caitlin Lloyd
- Travel Editor
80° 74° 68° 62° 56° Sep. *1 *2 *3 *4 *5 *6 *7 *8 *9 *10 *11 *12 *13 *14 *15 *16 *17 *18 *19 *20 *21 *22 *23 *24 *25 *26 *27 *28 *29 *30. Avg. Hi.
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September Weather in Seattle Washington, United States. Daily high temperatures decrease by 8°F, from 75°F to 67°F, rarely falling below 59°F or exceeding 83°F. Daily low temperatures decrease by 5°F, from 57°F to 51°F, rarely falling below 45°F or exceeding 61°F.
In Seattle, the average seawater temperature in September is 53.2°F (11.8°C). Note: Dipping into 53.2°F (11.8°C) below 50°F (10°C) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 55.4°F (13°C) feels cold to the bone.
- What is the average September temperature in Seattle?September temperatures in Seattle vary between a high-temperature of 69.6°F and a low-temperature of 50.5°F .
- What is the average humidity in September in Seattle?The average relative humidity in September is 75% .
- How much does it rain in Seattle in September?In Seattle, Washington, during September, the rain falls for 6 days and regularly aggregates up to 0.28" of precipitation .
- When it does not snow in Seattle?April through October and December are months without snowfall .
- How cold is the water in September in Seattle?In Seattle, in September, the average water temperature is 53.2°F . Swimming in 53.2°F is considered dangerous. Unprotected immersion in tempera...
- How many hours of daylight does Seattle have in September?In Seattle, Washington, the average day length in September is 12h and 33min .
- What time are sunrise and sunset in September in Seattle?In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:50 pm . On the last day of the month, sunrise is at 7:...
- How many hours of sunshine does Seattle have in September?The average sunshine duration in September in Seattle, Washington, is 9.4h .
- What is the UV index reading in September in Seattle?The average daily maximum UV index in September in Seattle is 4 . A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe...
September is a summer month. Anticipate daytime temperatures around 22°C, while night temperatures can drop to 12°C. Seattle in September usually receives moderate rainfall, averaging around 49 mm for the month. Based on our climate data of the past 30 years, about 9 days of rain are anticipated.
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering. The hourly reported temperature, color coded into bands. The shaded overlays indicate night and civil twilight. © OpenStreetMap contributors. Compare Seattle to another city: Map. Cloud Cover in September 2021 in Seattle. Fall 2021. Link.
by Liz Osborn CurrentResults.com. September continues with much of the warm, dry and sunny weather that's typical for Seattle, Washington in summer. This page gives detailed information on Seattle's usual September temperature, precipitation, sun, humidity, wind and storms for Seattle.
