September weather forecastPlainfield, WI
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Plainfield, Wisconsin, with an average temperature ranging between max 69.6°F (20.9°C) and min 51.6°F (10.9°C).Temperature
The start of September comes with a small reduction in the average high-temperature, subtly receding from a warm 77.2°F (25.1°C) in August to an agreeable 69.6°F (20.9°C). Plainfield's temperature drops to an average low of 51.6°F (10.9°C) during the nights of September.Humidity
In September, the average relative humidity is 80%.Rainfall
In Plainfield, during September, the rain falls for 12 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Plainfield, during the entire year, the rain falls for 131 days and collects up to 26.42" (671mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Plainfield is 12h and 30min.On the first day of September, sunrise is at 6:21 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:39 pm CDT.
Sunshine
In Plainfield, the average sunshine in September is 8.6h.UV index
In Plainfield, the average daily maximum UV index in September 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 ordinary individuals.Note: A daily high UV index of 3 in September leads to these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Plainfield, WI
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (21.7°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (10.4°F).
Average pressure in September
Plainfield, WI
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Plainfield, WI
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Plainfield, 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 (75%).
Average rainfall in September
Plainfield, WI
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (3.43").
The driest months (with the least rainfall) are January and February (1.22").
Average rainfall days in September
Plainfield, WI
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (4 days).
Average snowfall in September
Plainfield, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Plainfield, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Plainfield, 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 36min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Plainfield, WI
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is November (16.6 days).
The months with the least sunshine days are April and June (11.9 days).
Average UV index in September
Plainfield, 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
Plainfield, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Plainfield, WI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
