What is the hottest month in Champaign?

July is the warmest month in Champaign, with an average high of 85.2°F.

What is the coldest month in Champaign?

January is the coldest month in Champaign, with an average low of 17.9°F.

What month does Champaign get the most rain?

May is typically the wettest month in Champaign, with about 4.78 inches of precipitation.

What plant hardiness zone is Champaign in?

Champaign is approximately in USDA plant hardiness Zone 7a, based on the average annual extreme minimum temperature.

Has the climate in Champaign changed recently?

10.4% of Champaign's all-time daily heat records were set in the last decade (since 2015), compared to roughly 5% if records were evenly distributed over time.

Champaign, IL

Climate overview — based on NOAA 1991-2020 normals from CHAMPAIGN 3S, IL US.

Dfa Hot-summer humid continental climate 7a USDA hardiness Zone 7a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Champaign has an annual average temperature of 52.3°F with about 40.9 inches of precipitation per year and 20.8 inches of snow. The warmest month is July (average high 85.2°F), and the coldest is January (average low 17.9°F). May is typically the wettest month (4.78 in) and February the driest (2.18 in). Snow typically falls from November through April.

Pleasant months

2 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

49.5°F

warmest to coldest month

Heating need

5,424

HDD/yr

Cooling need

858

CDD/yr

Best time to visit Champaign

Full guide →

Climate change signal

All-time records →

38 of 366 (10.4%) of Champaign's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.

1900s		16
1910s		35
1920s		19
1930s		70
1940s		19
1950s		53
1960s		19
1970s		13
1980s		30
1990s		14
2000s		20
2010s		39
2020s		19

Bars: number of all-time daily heat records still standing that were set in each decade.

Monthly averages

Month	Avg High	Avg Low	Avg Temp	Precipitation	Snow	Rainy days
January	33.5°F	17.9°F	25.7°F	2.31 in	6.5 in	10
February	38.4°F	21.2°F	29.8°F	2.18 in	5.8 in	9
March	50.4°F	31.2°F	40.8°F	2.77 in	2.5 in	11
April	63.1°F	41.6°F	52.4°F	3.94 in	0.3 in	12
May	73.8°F	52.7°F	63.2°F	4.78 in	—	13
June	82.7°F	62.1°F	72.4°F	4.58 in	—	11
July	85.2°F	65.2°F	75.2°F	4.49 in	—	10
August	84.0°F	63.6°F	73.8°F	3.54 in	—	9
September	78.8°F	55.6°F	67.2°F	3.37 in	—	8
October	65.8°F	43.9°F	54.8°F	3.35 in	—	10
November	50.7°F	32.2°F	41.4°F	3.21 in	0.9 in	10
December	38.5°F	23.6°F	31.1°F	2.40 in	4.8 in	10