September weather forecastWilbern, IL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Wilbern, Illinois, with an average temperature ranging between max 75.4°F (24.1°C) and min 56.7°F (13.7°C).Temperature
The initiation of September sees an average high-temperature of a still moderately hot 75.4°F (24.1°C), showing minor variations from the previous month. In the month of September, Wilbern records a consistent average low-temperature of 56.7°F (13.7°C).Humidity
The average relative humidity in September is 77%.Rainfall
In Wilbern, in September, it is raining for 11.8 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, in Wilbern, Illinois, there are 148.8 rainfall days, and 30.94" (786mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Wilbern is 12h and 27min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:40 pm CDT.
Sunshine
In Wilbern, the average sunshine in September is 8.9h.UV index
In Wilbern, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 4 in September leads to these guidelines:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Wilbern, IL
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in September
Wilbern, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Wilbern, IL
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Wilbern, IL
- Average humidity in September: 77%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Wilbern, IL
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is January (1.57").
Average rainfall days in September
Wilbern, IL
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Wilbern, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Wilbern, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.4 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
Wilbern, IL
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Wilbern, IL
- Average sunshine days in September: 16 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in September
Wilbern, IL
- 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 and December (UV index 1).
Average cloud cover in September
Wilbern, IL
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in September
Wilbern, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
