September weather forecastBlueslide, WA
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Blueslide, Washington, with an average temperature ranging between max 66°F (18.9°C) and min 39.4°F (4.1°C).Temperature
September ushers in a slight temperature change, with average high-temperatures reducing from August's moderately hot 76.8°F (24.9°C) to a refreshing 66°F (18.9°C). From significant daily highs, Blueslide's nights in September cool down to an average low-temperature of 39.4°F (4.1°C).Humidity
In September, the average relative humidity is 65%.Rainfall
In Blueslide, Washington, in September, during 11.1 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. In Blueslide, Washington, during the entire year, the rain falls for 147.3 days and collects up to 20.12" (511mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Blueslide. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.51" (13mm) of snow. Throughout the year, in Blueslide, Washington, there are 95.8 snowfall days, and 50.39" (1280mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:07 am and sunset at 7:30 pm. On the last day of September, in Blueslide, sunrise is at 6:48 am and sunset at 6:29 pm PDT.
Sunshine
In Blueslide, the average sunshine in September is 9.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 3 in September translates into these instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blueslide, WA
- Average high temperature in September: 66°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.6°F).
- Average low temperature in September: 39.4°F
The month with the highest average low temperature is August (46.6°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in September
Blueslide, WA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Blueslide, WA
- Average wind speed in September: 3.5mph
The windiest months (with the highest average wind speed) are April, May and June (3.9mph).
The calmest months (with the lowest average wind speed) are January and December (3.2mph).
Average humidity in September
Blueslide, WA
- Average humidity in September: 65%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Blueslide, WA
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is August (0.59").
Average rainfall days in September
Blueslide, WA
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is April (18.5 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in September
Blueslide, WA
- Average snowfall in September: 0.51"
The month with the highest snowfall is January (11.77").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Blueslide, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (20.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Blueslide, WA
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Blueslide, WA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is August (20.2 days).
The month with the least sunshine days is March (7.6 days).
Average UV index in September
Blueslide, WA
- Average UV index in September: 3
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 1).
Average cloud cover in September
Blueslide, WA
- Average cloud cover in September: 26
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Blueslide, WA
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
