September weather forecastVirginia, IL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Virginia, Illinois, with an average temperature fluctuating between 77.7°F (25.4°C) and 58.6°F (14.8°C).Temperature
Virginia's average high-temperature in September is a still moderately hot 77.7°F (25.4°C), marking an insignificant difference from the 82.4°F (28°C) of August. Virginia, during September nights, observes an average temperature of 58.6°F (14.8°C).Humidity
In September, the average relative humidity is 75%.Rainfall
In Virginia, in September, during 12.3 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. Throughout the year, there are 155 rainfall days, and 31.73" (806mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Virginia, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:44 pm CDT.
Sunshine
The average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September in Virginia is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Virginia, IL
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Virginia, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Virginia, IL
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in September
Virginia, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Virginia, IL
- Average rainfall in September: 2.95"
The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days in September
Virginia, IL
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (6.6 days).
Average snowfall in September
Virginia, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.9").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Virginia, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10 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
Virginia, IL
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Virginia, IL
- Average sunshine days in September: 15.1 days
The months with the most sunshine days are November and December (18.6 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in September
Virginia, IL
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Virginia, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).
Average visibility in September
Virginia, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
