September weather forecastRidgefield, WA
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Ridgefield, Washington, with an average temperature fluctuating between 48.6°F (9.2°C) and 71.2°F (21.8°C).Temperature
September indicates a minor shift in the average high-temperature, from August's moderately hot 79.2°F (26.2°C) to a pleasant 71.2°F (21.8°C). In Ridgefield, following the steep rise of daytime temperatures, an average nighttime low of 48.6°F (9.2°C) is anticipated during September.Humidity
In Ridgefield, the average relative humidity in September is 74%.Rainfall
In Ridgefield, during September, the rain falls for 10.8 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, in Ridgefield, there are 180.9 rainfall days, and 39.41" (1001mm) of precipitation is accumulated.Snowfall
In Ridgefield, snow does not fall in April through October.Daylight
In Ridgefield, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September in Ridgefield is 8.9h.UV index
The average daily maximum UV index in September in Ridgefield, Washington, is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 4 during September translates into the following guidance:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ridgefield, WA
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is August (79.2°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).
Average pressure in September
Ridgefield, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Ridgefield, WA
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (5.4mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in September
Ridgefield, WA
- Average humidity in September: 74%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are July and August (69%).
Average rainfall in September
Ridgefield, WA
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is December (5.71").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Ridgefield, WA
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is March (21.3 days).
The month with the least rainy days is July (5.3 days).
Average snowfall in September
Ridgefield, WA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Ridgefield, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Ridgefield, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Ridgefield, WA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is July (23.5 days).
The months with the least sunshine days are February and March (8.3 days).
Average UV index in September
Ridgefield, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Ridgefield, WA
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Ridgefield, WA
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
