September weather forecastBlair, WI
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Blair, Wisconsin, with an average temperature fluctuating between 70.5°F (21.4°C) and 50.7°F (10.4°C).Temperature
In Blair, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's moderately hot 76.6°F (24.8°C) to an agreeable 70.5°F (21.4°C). Blair, during the nights of September, experiences an average temperature drop to a fresh 50.7°F (10.4°C).Humidity
The average relative humidity in September is 80%.Rainfall
In September, the rain falls for 13.1 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. In Blair, during the entire year, the rain falls for 142.8 days and collects up to 28.78" (731mm) of precipitation.Snowfall
In Blair, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:40 pm. On the last day of September, in Blair, sunrise is at 7:02 am and sunset at 6:46 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The UV index of 4 during September translates into the following guidance:
Heed the precautions - It is counselled to guard against solar damage. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blair, WI
- Average high temperature in September: 70.5°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (20.3°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (7°F).
Average pressure in September
Blair, WI
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Blair, WI
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Blair, WI
- Average humidity in September: 80%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Blair, WI
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is June (4.69").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in September
Blair, WI
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is June (19 days).
The months with the least rainy days are January and February (3.6 days).
Average snowfall in September
Blair, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Blair, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Blair, WI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 36min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Blair, WI
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is November (15.6 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in September
Blair, WI
- 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 1).
Average cloud cover in September
Blair, WI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Blair, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, August, October and November (6mi).
The month with the lowest visibility is January (4mi).
