September weather forecastElvaston, IL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Elvaston, Illinois, with an average temperature ranging between min 57.7°F (14.3°C) and max 77.5°F (25.3°C).Temperature
With the start of September, Elvaston measures an average high-temperature of a still moderately hot 77.5°F (25.3°C), not significantly differing from August's 82.8°F (28.2°C). During September, an average low-temperature of 57.7°F (14.3°C) is observed in Elvaston.Humidity
The average relative humidity in September in Elvaston is 74%.Rainfall
In September, the rain falls for 11.1 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. In Elvaston, during the entire year, the rain falls for 129.9 days and collects up to 20.71" (526mm) of precipitation.Snowfall
In Elvaston, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:33 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:48 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Undertake precautions - Guarding against sun damage is counselled. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Elvaston, IL
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in September
Elvaston, 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 (29.9"Hg).
Average wind speed in September
Elvaston, IL
- Average wind speed in September: 7.5mph
The windiest months (with the highest average wind speed) are January and February (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in September
Elvaston, IL
- Average humidity in September: 74%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Elvaston, IL
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in September
Elvaston, IL
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in September
Elvaston, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Elvaston, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.9 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
Elvaston, 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 18min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Elvaston, IL
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in September
Elvaston, 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
Elvaston, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
Elvaston, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
