September weather forecastKooskia, ID
September
Weather in September
September marks the transition of weather in Kooskia from summer to fall. The temperatures begin to cool down, and rainfall increases slightly. The city experiences a maximum temperature of 73.4°F (23°C), indicating that fall is knocking on the door. The wind speed and the chill factor experience a nominal increase. Yellow and orange hues start to adorn the landscape, signaling the arrival of the autumn season.Temperature
As September commences, the average high-temperature shows a reduction, transitioning from 82.6°F (28.1°C) in August to a still warm 73.4°F (23°C). Despite a significant disparity with daytime temperatures, an average low-temperature of 47.3°F (8.5°C) is recorded during September.Humidity
The average relative humidity in September in Kooskia is 54%.Rainfall
In Kooskia, in September, it is raining for 7.8 days, with typically 0.87" (22mm) of accumulated precipitation. In Kooskia, during the entire year, the rain falls for 156.5 days and collects up to 21.38" (543mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:05 am and sunset at 7:21 pm. On the last day of September, in Kooskia, sunrise is at 6:42 am and sunset at 6:25 pm PDT.
Sunshine
In September, the average sunshine is 10h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. To avoid the Sun's strongest rays, limit exposure around the mid-day period. 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
Kooskia, ID
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is December (34°F).
- Average low temperature in September: 47.3°F
The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).
Average pressure in September
Kooskia, ID
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).
Average wind speed in September
Kooskia, ID
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is March (4.4mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Kooskia, ID
- Average humidity in September: 54%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (48%).
Average rainfall in September
Kooskia, ID
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is March (2.56").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Kooskia, ID
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in September
Kooskia, ID
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Kooskia, ID
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Kooskia, ID
- 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: 10h and 0min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 54min).
Average sunshine days in September
Kooskia, ID
- Average sunshine days in September: 20.3 days
The month with the most sunshine days is July (23.2 days).
The month with the least sunshine days is April (9.1 days).
Average UV index in September
Kooskia, ID
- 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 February (UV index 1).
Average cloud cover in September
Kooskia, ID
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Kooskia, ID
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
