September weather forecastBlue River, WI
September
Weather in September
September, the first month of the autumn in Blue River, is still a pleasant month, with an average temperature fluctuating between 51.4°F (10.8°C) and 71.8°F (22.1°C).Temperature
In Blue River, the average high-temperature in September gently drops from a moderately hot 79.2°F (26.2°C) in August to an agreeable 71.8°F (22.1°C). In the month of September, the temperature generally rests at an average low of 51.4°F (10.8°C).Humidity
The average relative humidity in September is 80%.Rainfall
In Blue River, in September, during 11.8 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, there are 142.4 rainfall days, and 28.66" (728mm) of precipitation is accumulated.Snowfall
In Blue River, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 6:27 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:44 pm CDT.
Sunshine
In September, the average sunshine in Blue River is 8.9h.UV index
The average daily maximum UV index in September in Blue River is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 suggests this advice:
Guard yourself - Precautionary measures against sun damage are advocated. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blue River, WI
- Average high temperature in September: 71.8°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in September
Blue River, WI
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Blue River, WI
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in September
Blue River, WI
- Average humidity in September: 80%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Blue River, WI
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in September
Blue River, WI
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Blue River, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Blue River, 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 May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Blue River, WI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Blue River, WI
- Average sunshine days in September: 16.4 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
Blue River, 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, November and December (UV index 1).
Average cloud cover in September
Blue River, WI
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Blue River, 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).
