September weather forecastFort Rains, WA
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Fort Rains, Washington, with an average temperature fluctuating between 67.5°F (19.7°C) and 45.7°F (7.6°C).Temperature
Setting in of September comes with a decrease in the average high-temperature, moving from a warm 76.5°F (24.7°C) in August to an enjoyable 67.5°F (19.7°C). September nights see a notable contrast from daytime highs, with the nighttime temperature averaging at a chilly 45.7°F (7.6°C).Humidity
In September, the average relative humidity is 72%.Rainfall
In September, the rain falls for 8.4 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. Throughout the year, there are 158.4 rainfall days, and 30.31" (770mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 6:29 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:48 pm PDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In Fort Rains, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The UV index of 3 in September translates into these instructions:
Adopt protective measures - It is advised to guard against sun damage. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fort Rains, WA
- Average high temperature in September: 67.5°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (37.9°F).
- Average low temperature in September: 45.7°F
The month with the highest average low temperature is August (48.7°F).
The coldest month (with the lowest average low temperature) is December (28.2°F).
Average pressure in September
Fort Rains, WA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in September
Fort Rains, WA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Fort Rains, WA
- Average humidity in September: 72%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are July and August (67%).
Average rainfall in September
Fort Rains, WA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is January (5.35").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Fort Rains, WA
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is March (18.9 days).
The month with the least rainy days is July (4.4 days).
Average snowfall in September
Fort Rains, WA
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Fort Rains, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 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
Fort Rains, 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: 8h and 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in September
Fort Rains, WA
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is July (24.5 days).
The month with the least sunshine days is February (9.4 days).
Average UV index in September
Fort Rains, WA
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Fort Rains, WA
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in September
Fort Rains, WA
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
