September weather forecastNelson, WI
September
Weather in September
September, the first month of the autumn in Nelson, is also an agreeable month, with an average temperature varying between 70.7°F (21.5°C) and 50.9°F (10.5°C).Temperature
A mild shift in the average high-temperature occurs in September, reducing from a warm 77.5°F (25.3°C) in August to an agreeable 70.7°F (21.5°C). Nelson's average low-temperature is measured at a cool 50.9°F (10.5°C) during September.Humidity
The average relative humidity in September is 80%.Rainfall
In Nelson, during September, the rain falls for 12 days and regularly aggregates up to 2.09" (53mm) of precipitation. Throughout the year, there are 135.6 rainfall days, and 25.79" (655mm) of precipitation is accumulated.Snowfall
In Nelson, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:49 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Adopt protective measures - It is advised to guard against sun damage. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Nelson, WI
- Average high temperature in September: 70.7°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 (20.5°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (7.2°F).
Average pressure in September
Nelson, WI
- Average pressure in September: 30.01"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
Nelson, WI
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in September
Nelson, WI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Nelson, WI
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in September
Nelson, WI
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is June (18.3 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in September
Nelson, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.01").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Nelson, 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
Nelson, 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 30min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Nelson, WI
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is October (17.4 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in September
Nelson, 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
Nelson, WI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Nelson, 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).
