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
September brings a minor shift in the average high-temperature, adjusting from a warm 77.2°F (25.1°C) in August to a pleasant 68.7°F (20.4°C). The average low-temperature of 48.9°F (9.4°C) is witnessed during September.Humidity
The average relative humidity in September is 76%.Rainfall
In Willow River, in September, it is raining for 10.8 days, with typically 1.61" (41mm) of accumulated precipitation. In Willow River, during the entire year, the rain falls for 114 days and collects up to 20.08" (510mm) of precipitation.Snowfall
In Willow River, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 6:32 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:52 pm CDT.
Sunshine
The average sunshine in September in Willow River is 8.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Willow River in September?
What is the average humidity in September in Willow River?
How many days does it rain in September in Willow River?
When it does not snow in Willow River?
Does it snow in Willow River in September?
How many hours of daylight does Willow River have in September?
What time are sunrise and sunset in September in Willow River?
How many hours of sunshine does Willow River have in September?
What is the UV index reading in September in Willow River?
Average temperature in September
Willow River, MN
- Average high temperature in September: 68.7°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (17.1°F).
- Average low temperature in September: 48.9°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (3.2°F).
Average pressure in September
Willow River, MN
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Willow River, MN
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Willow River, MN
- Average humidity in September: 76%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Willow River, MN
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Willow River, MN
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is June (15.3 days).
The month with the least rainy days is January (2.1 days).
Average snowfall in September
Willow River, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Willow River, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Willow River, MN
- Average daylight in September: 12h and 3min
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: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Willow River, MN
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is September (16.9 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in September
Willow River, MN
- 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
Willow River, MN
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Willow River, MN
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Willow River, Minnesota, USA
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