Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Champaign commences September with an average high-temperature of a still moderately hot 76.1°F (24.5°C), maintaining a close resemblance to the previous month. September brings with it a nighttime average temperature of 58.3°F (14.6°C).Humidity
In September, the average relative humidity is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.4 days and typically collects 0.94" (24mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of September in Champaign, sunrise is at 6:21 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm CDT.
Sunshine
In Champaign, the average sunshine in September is 8.9h.UV index
In Champaign, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 5 during September translates into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Champaign have in September?
What time are sunrise and sunset in September in Champaign?
How many hours of sunshine does Champaign have in September?
What is the UV index intensity in September?
Average temperature in September
Champaign, 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 (31.8°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in September
Champaign, 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 (29.92"Hg).
Average wind speed in September
Champaign, IL
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Champaign, 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 (70%).
Average rainfall in September
Champaign, IL
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is April (2.24").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in September
Champaign, IL
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (6 days).
Average snowfall in September
Champaign, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Champaign, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.7 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
Champaign, IL
- Average daylight in September: 12h and 2min
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: 8h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Champaign, IL
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in September
Champaign, 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
Champaign, IL
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in September
Champaign, 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).
Champaign, Illinois, USA
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