September weather forecastDeer Creek, IL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Deer Creek, Illinois, with an average temperature varying between 76.1°F (24.5°C) and 57.2°F (14°C).Temperature
The arrival of September coincides with an average high-temperature of a still warm 76.1°F (24.5°C), indicating a minimal shift from August's 80.6°F (27°C). Deer Creek experiences an average nighttime temperature of 57.2°F (14°C) in the month of September.Humidity
In September, the average relative humidity is 76%.Rainfall
In Deer Creek, during September, the rain falls for 7.7 days and regularly aggregates up to 0.71" (18mm) of precipitation. In Deer Creek, during the entire year, the rain falls for 99.2 days and collects up to 8.43" (214mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:25 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm CDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 during September leads to these advisories:
Ensure safety - Sun damage prevention is strongly urged. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Deer Creek, IL
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Deer Creek, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Deer Creek, IL
- Average wind speed in September: 7.6mph
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
Deer Creek, IL
- Average humidity in September: 76%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Deer Creek, IL
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is May (1.14").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days in September
Deer Creek, IL
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in September
Deer Creek, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Deer Creek, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 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
Deer Creek, 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 6min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Deer Creek, IL
- Average sunshine days in September: 19.7 days
The month with the most sunshine days is January (23 days).
The month with the least sunshine days is May (14.7 days).
Average UV index in September
Deer Creek, 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
Deer Creek, IL
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in September
Deer Creek, 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).
