September weather forecast and climate
Champaign, IL

What is the temperature in September in Champaign?

In Champaign, Illinois, in September, the average high-temperature is 77.9°F (25.5°C), and the average low-temperature is 55.4°F (13°C).
Average temperature in September - Champaign, IL
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (33.8°F).

  • Average low temperature in September: 55.4°F

The month with the highest average low temperature is July (64.7°F).
The coldest month (with the lowest average low temperature) is January (18.2°F).

Average rainfall in September - Champaign, IL
  • Average rainfall in September: 3.2"

The wettest month (with the highest rainfall) is May (4.8").
The driest month (with the lowest rainfall) is January (1.9").

Average rainfall days in September - Champaign, IL
  • Average rainfall days in September: 8 days

Months with the highest number of rainy days are March, April and December (12 days).
Months with the lowest number of rainy days are September and October (8 days).

Average snowfall in September - Champaign, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (6.1").
Months with the lowest snowfall are May, June, July, August and September (0").

Average daylight in September / Average sunshine in September - Champaign, IL
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in September: 8h

Months with most sunshine are June and July (Average sunshine: 10h).
Months with least sunshine are November and December (Average sunshine: 4).

Average UV index in September - Champaign, IL
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 9).
The month with the lowest UV index is December (UV index 1).

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