September weather forecastBlack River Falls, WI
September
Weather in September
September, the first month of the autumn in Black River Falls, is also an agreeable month, with temperature in the range of an average high of 70.3°F (21.3°C) and an average low of 50.5°F (10.3°C).Temperature
During the shift to September, Black River Falls records a mild decrease in average high-temperature, moving from a warm 77°F (25°C) in August to a pleasant 70.3°F (21.3°C). Throughout September, Black River Falls witnesses a consistent average low-temperature of 50.5°F (10.3°C).Humidity
The average relative humidity in September in Black River Falls is 80%.Rainfall
In September, the rain falls for 10.8 days. Throughout September, 1.42" (36mm) of precipitation is accumulated. In Black River Falls, during the entire year, the rain falls for 120.8 days and collects up to 16.34" (415mm) of precipitation.Snowfall
In Black River Falls, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:39 pm. On the last day of September, in Black River Falls, sunrise is at 7:00 am and sunset at 6:45 pm CDT.
Sunshine
The average sunshine in September in Black River Falls is 8.7h.UV index
The average daily maximum UV index in September in Black River Falls is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A typical high UV index of 3 in September suggests the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Black River Falls, WI
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (7.3°F).
Average pressure in September
Black River Falls, 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
Black River Falls, WI
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Black River Falls, WI
- Average humidity in September: 80%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Black River Falls, WI
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is June (2.91").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Black River Falls, WI
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is June (17.1 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Black River Falls, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.99").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Black River Falls, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Black River Falls, 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 42min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Black River Falls, WI
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
Black River Falls, 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
Black River Falls, 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
Black River Falls, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, March, July, August, September and December (5mi).
