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 shift from August to September includes a small decrease in the average high-temperature, from a warm 76.6°F (24.8°C) to a pleasant 70.2°F (21.2°C). In September, River Falls experiences an average nighttime temperature of 51.3°F (10.7°C).Humidity
The average relative humidity in September in River Falls, Wisconsin, is 79%.Rainfall
In River Falls, in September, during 11.9 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, there are 123.7 rainfall days, and 20.43" (519mm) of precipitation is accumulated.Snowfall
In River Falls, snow does not fall in June through September.Daylight
The average length of the day in September in River Falls, Wisconsin, is 12h and 31min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:46 pm. On the last day of September, in River Falls, sunrise is at 7:08 am and sunset at 6:52 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Guard yourself - Precautionary measures against sun damage are advocated. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in River Falls?
What is the average humidity in September in River Falls?
How much does it rain in River Falls in September?
When it does not snow in River Falls?
Does it snow in River Falls in September?
What is the average length of the day in September in River Falls?
When are sunrise and sunset in September in River Falls?
How many hours of sunshine does River Falls have in September?
What is the UV index intensity in September in River Falls?
Average temperature in September
River Falls, WI
- Average high temperature in September: 70.2°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 (19.2°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in September
River Falls, WI
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
River Falls, WI
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
River Falls, WI
- Average humidity in September: 79%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
River Falls, WI
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is June (3.78").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
River Falls, WI
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
River Falls, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
River Falls, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
River Falls, WI
- Average daylight in September: 12h and 3min
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 4min
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
River Falls, WI
- Average sunshine days in September: 15.8 days
The months with the most sunshine days are October and December (17.6 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
River Falls, 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
River Falls, WI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 69).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
River Falls, WI
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
River Falls, Wisconsin, USA
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