Champaign climate

Champaign Weather in September

NOAA 1991-2020 normals for Champaign 3S, 3.6 km from Champaign

Average highs run from 83°F on September 1 to 74°F on September 30, and lows from 61°F to 50°F. Normal precipitation for the month is 3.37 in over about 8 wet days.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Champaign, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
79°F
Average low
56°F
Precipitation
3.37 in
Record high
99°FSep 1, 2011
Record low
33°FSep 25, 2001
Chance of a freeze
1%
Days of 90°F or more
3.3
Daylight
13 h 03 min to 11 h 49 min
Cloud cover
48%
Humidity
70%
Dew point
55°F
Wind
8.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 183°F61°F99°F 201150°F 200928%0%
Sep 283°F61°F98°F 201145°F 201728%0%
Sep 382°F60°F97°F 201149°F 202527%0%
Sep 482°F60°F96°F 200747°F 199727%0%
Sep 582°F60°F97°F 201843°F 199727%0%
Sep 682°F59°F95°F 201543°F 202527%0%
Sep 782°F59°F94°F 201539°F 202527%0%
Sep 881°F59°F92°F 201542°F 202427%0%
Sep 981°F58°F96°F 201345°F 202427%0%
Sep 1081°F58°F98°F 201344°F 199927%0%
Sep 1181°F57°F95°F 201348°F 199827%0%
Sep 1280°F57°F91°F 199844°F 200727%0%
Sep 1380°F57°F96°F 202539°F 201427%0%
Sep 1480°F56°F95°F 202542°F 201427%0%
Sep 1579°F56°F97°F 202637°F 200727%0%
Sep 1679°F56°F93°F 201839°F 200027%0%
Sep 1779°F55°F94°F 201841°F 199927%0%
Sep 1878°F55°F94°F 201841°F 201227%0%
Sep 1978°F54°F94°F 200538°F 201227%0%
Sep 2078°F54°F95°F 201737°F 200627%0%
Sep 2177°F54°F97°F 201038°F 199927%0%
Sep 2277°F53°F95°F 200535°F 199927%0%
Sep 2377°F53°F94°F 201737°F 201227%0%
Sep 2476°F52°F94°F 201734°F 201227%0%
Sep 2576°F52°F93°F 201733°F 200127%0%
Sep 2675°F52°F93°F 201734°F 200027%0%
Sep 2775°F51°F92°F 199837°F 202227%0%
Sep 2874°F51°F91°F 202535°F 202227%0%
Sep 2974°F50°F92°F 202535°F 200328%0%
Sep 3074°F50°F91°F 201935°F 200328%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Champaign, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:21 AM, sunset 7:24 PM
September 30
sunrise 6:48 AM, sunset 6:37 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00118740 (Champaign 3S), public domain. Records: NOAA GHCN-Daily, station USW00094870, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.