September weather forecastPlain, WI
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Plain, Wisconsin, with an average temperature varying between 71.4°F (21.9°C) and 51.3°F (10.7°C).Temperature
The shift from August to September includes a small decrease in the average high-temperature, from a warm 78.4°F (25.8°C) to a pleasant 71.4°F (21.9°C). Plain's average low-temperature in September is measured at a cool 51.3°F (10.7°C).Humidity
In September, the average relative humidity is 80%.Rainfall
In Plain, Wisconsin, in September, during 10.9 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. Throughout the year, in Plain, there are 122.9 rainfall days, and 17.76" (451mm) of precipitation is accumulated.Snowfall
In Plain, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:25 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:42 pm CDT.
Sunshine
In September, the average sunshine in Plain is 8.8h.UV index
In Plain, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a regular UV index of 3 translates into these guidelines:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Plain, WI
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (23.4°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 (10°F).
Average pressure in September
Plain, WI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Plain, WI
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Plain, WI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Plain, WI
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is July (2.32").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in September
Plain, WI
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in September
Plain, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Plain, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Plain, 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 48min
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 12min).
Average sunshine days in September
Plain, WI
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Plain, WI
- Average UV index in September: 3
The months with the highest UV index are 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
Plain, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Plain, WI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
