September weather forecastBellevue, WI
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Bellevue, Wisconsin, with an average temperature ranging between min 54°F (12.2°C) and max 68.9°F (20.5°C).Temperature
With the arrival of September, Bellevue notices a mild change in the average high-temperature, sliding from August's warm 75.9°F (24.4°C) to an agreeable 68.9°F (20.5°C). During September, an average low-temperature of 54°F (12.2°C) is observed in Bellevue.Humidity
The average relative humidity in September in Bellevue is 79%.Rainfall
In September, the rain falls for 12.5 days. Throughout September, 1.46" (37mm) of precipitation is accumulated. Throughout the year, there are 131.1 rainfall days, and 19.88" (505mm) of precipitation is accumulated.Snowfall
In Bellevue, Wisconsin, 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 6:15 am and sunset at 7:27 pm. On the last day of September, in Bellevue, sunrise is at 6:49 am and sunset at 6:33 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In Bellevue, Wisconsin, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Around midday, solar radiation is most harmful; hence, exposure should be limited. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bellevue, WI
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (23.5°F).
- Average low temperature in September: 54°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 (14°F).
Average pressure in September
Bellevue, WI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Bellevue, WI
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in September
Bellevue, WI
- Average humidity in September: 79%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
Bellevue, WI
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Bellevue, WI
- Average rainfall days in September: 12.5 days
The months with the highest number of rainy days are May and July (14.9 days).
The month with the least rainy days is January (3.9 days).
Average snowfall in September
Bellevue, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.9").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bellevue, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bellevue, 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 48min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in September
Bellevue, WI
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is February (11.7 days).
Average UV index in September
Bellevue, WI
- Average UV index in September: 4
The months with the highest UV index are 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
Bellevue, WI
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in September
Bellevue, WI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
