Rantoul Weather in September
Average highs run from 85°F on September 1 to 75°F on September 30, and lows from 59°F to 48°F. Normal precipitation for the month is 3.28 in over about 7 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 81°F
- Average low
- 54°F
- Precipitation
- 3.28 in
- Record high
- 103°FSep 5, 1899
- Record low
- 24°FSep 30, 1899
- Chance of a freeze
- 5%
- Days of 90°F or more
- 4.2
- Daylight
- 13 h 04 min to 11 h 48 min
- Cloud cover
- 48%
- Humidity
- 71%
- 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 85°F | 59°F | 100°F 1953 | 44°F 1987 | 24% | 0% |
| Sep 2 | 85°F | 59°F | 101°F 1953 | 42°F 1909 | 23% | 0% |
| Sep 3 | 84°F | 59°F | 99°F 2011 | 44°F 1908 | 23% | 0% |
| Sep 4 | 84°F | 59°F | 98°F 1954 | 40°F 1997 | 23% | 0% |
| Sep 5 | 84°F | 58°F | 103°F 1899 | 42°F 1997 | 23% | 0% |
| Sep 6 | 84°F | 58°F | 99°F 1954 | 41°F 2000 | 23% | 0% |
| Sep 7 | 84°F | 58°F | 101°F 1899 | 46°F 1956 | 23% | 0% |
| Sep 8 | 83°F | 57°F | 98°F 1897 | 38°F 1986 | 23% | 0% |
| Sep 9 | 83°F | 57°F | 98°F 1897 | 45°F 1969 | 23% | 0% |
| Sep 10 | 83°F | 57°F | 98°F 2013 | 41°F 1902 | 23% | 0% |
| Sep 11 | 83°F | 56°F | 99°F 1897 | 42°F 1967 | 22% | 0% |
| Sep 12 | 82°F | 56°F | 100°F 1897 | 42°F 1993 | 22% | 0% |
| Sep 13 | 82°F | 56°F | 99°F 1897 | 34°F 1902 | 22% | 0% |
| Sep 14 | 82°F | 55°F | 96°F 1897 | 34°F 1902 | 22% | 0% |
| Sep 15 | 81°F | 55°F | 97°F 1897 | 40°F 2014 | 22% | 0% |
| Sep 16 | 81°F | 54°F | 98°F 1982 | 36°F 2000 | 22% | 0% |
| Sep 17 | 81°F | 54°F | 92°F 1906 | 38°F 1900 | 22% | 0% |
| Sep 18 | 80°F | 54°F | 95°F 1908 | 34°F 1901 | 22% | 0% |
| Sep 19 | 80°F | 53°F | 94°F 1908 | 35°F 1991 | 22% | 0% |
| Sep 20 | 80°F | 53°F | 95°F 1908 | 36°F 1956 | 22% | 0% |
| Sep 21 | 79°F | 52°F | 95°F 1908 | 34°F 1897 | 23% | 0% |
| Sep 22 | 79°F | 52°F | 96°F 2017 | 34°F 1989 | 23% | 0% |
| Sep 23 | 78°F | 51°F | 96°F 2017 | 32°F 1989 | 23% | 0% |
| Sep 24 | 78°F | 51°F | 94°F 2017 | 33°F 1989 | 23% | 0% |
| Sep 25 | 78°F | 51°F | 94°F 2017 | 29°F 2001 | 23% | 0% |
| Sep 26 | 77°F | 50°F | 93°F 1908 | 30°F 2001 | 23% | 0% |
| Sep 27 | 77°F | 50°F | 93°F 1998 | 31°F 1899 | 23% | 0% |
| Sep 28 | 76°F | 49°F | 93°F 1953 | 36°F 2001 | 23% | 0% |
| Sep 29 | 76°F | 49°F | 99°F 1953 | 29°F 1899 | 23% | 0% |
| Sep 30 | 75°F | 48°F | 94°F 1897 | 24°F 1899 | 23% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- September 1
- sunrise 6:20 AM, sunset 7:24 PM
- September 30
- sunrise 6:48 AM, sunset 6:36 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014806 (Rantoul), public domain. Records: NOAA GHCN-Daily, station USW00014806, 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.