Wheaton Weather in December
Average highs run from 51°F on December 1 to 44°F on December 31, and lows from 31°F to 25°F. Normal precipitation for the month is 2.85 in over about 7 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 47°F
- Average low
- 28°F
- Precipitation
- 2.85 in
- Snowfall
- 1.1 in
- Record high
- 79°FDec 28, 2025
- Record low
- -17°FDec 23, 1989
- Chance of a freeze
- 100%
- Daylight
- 9 h 50 min to 9 h 41 min
- Cloud cover
- 63%
- Humidity
- 84%
- Dew point
- 30°F
- Wind
- 9.6 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 |
|---|---|---|---|---|---|---|
| Dec 1 | 51°F | 31°F | 73°F 1982 | 10°F 1985 | 24% | 2% |
| Dec 2 | 51°F | 31°F | 69°F 1982 | 6°F 1985 | 24% | 2% |
| Dec 3 | 51°F | 31°F | 74°F 2021 | 11°F 1989 | 24% | 2% |
| Dec 4 | 50°F | 31°F | 72°F 2012 | 12°F 2006 | 24% | 2% |
| Dec 5 | 50°F | 30°F | 71°F 1989 | 12°F 2002 | 24% | 2% |
| Dec 6 | 50°F | 30°F | 74°F 1998 | 4°F 1972 | 23% | 2% |
| Dec 7 | 49°F | 30°F | 64°F 1980 | -1°F 2013 | 23% | 2% |
| Dec 8 | 49°F | 30°F | 75°F 1991 | 7°F 2013 | 23% | 2% |
| Dec 9 | 49°F | 29°F | 66°F 1993 | 1°F 1995 | 23% | 3% |
| Dec 10 | 49°F | 29°F | 69°F 2020 | 2°F 1995 | 23% | 3% |
| Dec 11 | 48°F | 29°F | 73°F 2020 | 9°F 1989 | 23% | 3% |
| Dec 12 | 48°F | 29°F | 71°F 2015 | 3°F 1989 | 23% | 3% |
| Dec 13 | 48°F | 28°F | 70°F 1975 | 1°F 1985 | 23% | 3% |
| Dec 14 | 47°F | 28°F | 69°F 1975 | -3°F 1985 | 23% | 3% |
| Dec 15 | 47°F | 28°F | 69°F 2021 | -7°F 1989 | 23% | 3% |
| Dec 16 | 47°F | 28°F | 74°F 2021 | -9°F 1989 | 23% | 3% |
| Dec 17 | 47°F | 27°F | 68°F 2006 | -1°F 2000 | 23% | 3% |
| Dec 18 | 47°F | 27°F | 70°F 2006 | -2°F 2016 | 23% | 3% |
| Dec 19 | 46°F | 27°F | 74°F 1978 | -2°F 1983 | 23% | 3% |
| Dec 20 | 46°F | 27°F | 67°F 1997 | 2°F 1983 | 22% | 3% |
| Dec 21 | 46°F | 27°F | 63°F 1979 | -8°F 1989 | 22% | 3% |
| Dec 22 | 46°F | 26°F | 69°F 1982 | -15°F 1989 | 22% | 3% |
| Dec 23 | 45°F | 26°F | 71°F 1982 | -17°F 1989 | 22% | 4% |
| Dec 24 | 45°F | 26°F | 72°F 2025 | -11°F 1983 | 22% | 4% |
| Dec 25 | 45°F | 26°F | 76°F 2025 | -13°F 1983 | 22% | 4% |
| Dec 26 | 45°F | 26°F | 76°F 2025 | -3°F 1983 | 22% | 4% |
| Dec 27 | 45°F | 26°F | 77°F 2025 | 10°F 2022 | 22% | 4% |
| Dec 28 | 45°F | 25°F | 79°F 2025 | 4°F 1983 | 22% | 4% |
| Dec 29 | 45°F | 25°F | 72°F 2025 | -9°F 1983 | 22% | 4% |
| Dec 30 | 44°F | 25°F | 69°F 2022 | -7°F 1983 | 22% | 4% |
| Dec 31 | 44°F | 25°F | 67°F 1999 | -6°F 1976 | 22% | 4% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:10 AM, sunset 5:00 PM
- December 31
- sunrise 7:29 AM, sunset 5:10 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00235704 (Monett 4SW), public domain. Records: NOAA GHCN-Daily, station USC00235704, 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.