September weather forecastCoon Valley, WI
September
Weather in September
September, the first month of the autumn in Coon Valley, is also an agreeable month, with an average temperature fluctuating between 71.4°F (21.9°C) and 51.1°F (10.6°C).Temperature
The average high-temperature slightly decreases in September, shifting from a warm 78.1°F (25.6°C) in August to a pleasant 71.4°F (21.9°C). During September, the nighttime temperature averages of 51.1°F (10.6°C).Humidity
The average relative humidity in September is 80%.Rainfall
In September, the rain falls for 12.3 days. Throughout September, 2.28" (58mm) of precipitation is accumulated. Throughout the year, there are 140.4 rainfall days, and 27.76" (705mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Coon Valley.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:28 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:46 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index in Coon Valley is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Coon Valley, WI
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (21.6°F).
- Average low temperature in September: 51.1°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (8.4°F).
Average pressure in September
Coon Valley, WI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Coon Valley, WI
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in September
Coon Valley, WI
- Average humidity in September: 80%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Coon Valley, WI
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is June (4.76").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in September
Coon Valley, WI
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in September
Coon Valley, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Coon Valley, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Coon Valley, WI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 42min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Coon Valley, WI
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in September
Coon Valley, WI
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Coon Valley, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Coon Valley, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, October and November (6mi).
The month with the lowest visibility is January (4mi).
