September weather forecastWashougal, WA
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Washougal, Washington, with an average temperature fluctuating between 72.5°F (22.5°C) and 49.5°F (9.7°C).Temperature
A minor decrease in the average high-temperature is observed during September, shifting from a warm 79.7°F (26.5°C) in August to a pleasant 72.5°F (22.5°C). Washougal registers a pronounced decline from daytime peak temperatures, averaging a chilly 49.5°F (9.7°C) lows in September.Humidity
The average relative humidity in September in Washougal is 70%.Rainfall
In Washougal, during September, the rain falls for 10.1 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Washougal, during the entire year, the rain falls for 171 days and collects up to 37.2" (945mm) of precipitation.Snowfall
In Washougal, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 6:31 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:50 pm PDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In Washougal, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Exercise prevention - Protecting skin and eyes from harm is required. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Washougal, WA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is August (52.7°F).
The coldest month (with the lowest average low temperature) is December (33.3°F).
Average pressure in September
Washougal, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Washougal, WA
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Washougal, WA
- Average humidity in September: 70%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (65%).
Average rainfall in September
Washougal, WA
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is December (5.63").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Washougal, WA
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is August (4.1 days).
Average snowfall in September
Washougal, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Washougal, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Washougal, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Washougal, WA
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in September
Washougal, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Washougal, WA
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Washougal, WA
- Average visibility in September: 6mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
