Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The average high-temperature decreases in September, shifting from a warm 83.1°F (28.4°C) in August to an agreeable 71.6°F (22°C). Despite the hot September days, Chewelah's nights see an average temperature plunge to a frosty 44.6°F (7°C).Humidity
In September, the average relative humidity is 57%.Rainfall
In Chewelah, during September, the rain falls for 7.8 days and regularly aggregates up to 0.83" (21mm) of precipitation. Throughout the year, in Chewelah, there are 141.6 rainfall days, and 17.56" (446mm) of precipitation is accumulated.Snowfall
January through April, September through December are months with snowfall in Chewelah. September is the first month it typically snows in Chewelah, Washington. Throughout September, in the average 0.2 snowfall days, it receives 0.63" (16mm) of snow. In Chewelah, Washington, during the entire year, snow falls for 57.8 days and aggregates up to 34.09" (866mm) of snow.Daylight
In September, the average length of the day is 12h and 34min.On the first day of September in Chewelah, sunrise is at 6:09 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:31 pm PDT.
Sunshine
In Chewelah, the average sunshine in September is 10.3h.UV index
In September, the average daily maximum UV index in Chewelah 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: A daily maximum UV index of 3 in September translates into the following instructions:
Make use of precautions - It is urged to ward off sun damage. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
What is the temperature in September in Chewelah?
What is the average humidity in September in Chewelah?
How much does it rain in Chewelah in September?
When does it start to snow in Chewelah?
How many hours of daylight does Chewelah have in September?
When are sunrise and sunset in September in Chewelah?
How long on average sun shines in September in Chewelah?
How high is the UV index in September in Chewelah?
Average temperature in September
Chewelah, WA
- Average high temperature in September: 71.6°F
The warmest month (with the highest average high temperature) is August (83.1°F).
The month with the lowest average high temperature is December (29.8°F).
- Average low temperature in September: 44.6°F
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).
Average pressure in September
Chewelah, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in September
Chewelah, WA
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest months (with the lowest average wind speed) are January and December (3.5mph).
Average humidity in September
Chewelah, WA
- Average humidity in September: 57%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (47%).
Average rainfall in September
Chewelah, WA
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is January (2.2").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in September
Chewelah, WA
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is March (17.1 days).
The month with the least rainy days is August (5.6 days).
Average snowfall in September
Chewelah, WA
- Average snowfall in September: 0.63"
The month with the highest snowfall is January (10.47").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
Chewelah, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (15.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Chewelah, WA
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 10h and 2min
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 36min).
Average sunshine days in September
Chewelah, WA
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is August (22.9 days).
The month with the least sunshine days is March (9.3 days).
Average UV index in September
Chewelah, 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
Chewelah, WA
- Average cloud cover in September: 21
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Chewelah, WA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Chewelah, Washington, USA
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