McLean County Weather in December
Average highs run from 31°F on December 1 to 20°F on December 31, and lows from 14°F to 4°F. Normal precipitation for the month is 0.45 in over about 5 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
- 25°F
- Average low
- 9°F
- Precipitation
- 0.45 in
- Snowfall
- 9.9 in
- Record high
- 60°FDec 1, 2021
- Record low
- -32°FDec 23, 2013
- Chance of a freeze
- 100%
- Daylight
- 8 h 43 min to 8 h 29 min
- Cloud cover
- 67%
- Humidity
- 86%
- Dew point
- 13°F
- Wind
- 11.9 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 | 31°F | 14°F | 60°F 2021 | -23°F 2014 | 14% | 11% |
| Dec 2 | 30°F | 14°F | 50°F 2001 | -12°F 2006 | 14% | 11% |
| Dec 3 | 30°F | 13°F | 48°F 1999 | -16°F 2006 | 14% | 11% |
| Dec 4 | 29°F | 13°F | 49°F 2015 | -15°F 2002 | 14% | 11% |
| Dec 5 | 29°F | 12°F | 49°F 2015 | -13°F 2005 | 14% | 11% |
| Dec 6 | 29°F | 12°F | 60°F 2023 | -16°F 2025 | 14% | 11% |
| Dec 7 | 28°F | 12°F | 52°F 2015 | -21°F 2013 | 14% | 12% |
| Dec 8 | 28°F | 11°F | 53°F 2020 | -15°F 2007 | 14% | 12% |
| Dec 9 | 27°F | 11°F | 59°F 2015 | -21°F 2016 | 14% | 12% |
| Dec 10 | 27°F | 11°F | 47°F 2015 | -20°F 2016 | 14% | 12% |
| Dec 11 | 27°F | 10°F | 52°F 2004 | -20°F 2013 | 14% | 12% |
| Dec 12 | 26°F | 10°F | 50°F 2017 | -15°F 2000 | 14% | 12% |
| Dec 13 | 26°F | 9°F | 48°F 2002 | -15°F 2009 | 14% | 13% |
| Dec 14 | 25°F | 9°F | 50°F 1998 | -19°F 2008 | 14% | 13% |
| Dec 15 | 25°F | 9°F | 49°F 2018 | -23°F 2008 | 14% | 13% |
| Dec 16 | 25°F | 8°F | 44°F 2025 | -20°F 2008 | 14% | 13% |
| Dec 17 | 24°F | 8°F | 49°F 2004 | -23°F 2016 | 14% | 13% |
| Dec 18 | 24°F | 8°F | 51°F 2011 | -21°F 2022 | 14% | 13% |
| Dec 19 | 24°F | 7°F | 51°F 2004 | -18°F 2022 | 14% | 14% |
| Dec 20 | 23°F | 7°F | 51°F 2004 | -24°F 2022 | 14% | 14% |
| Dec 21 | 23°F | 7°F | 43°F 2023 | -24°F 2022 | 15% | 14% |
| Dec 22 | 23°F | 6°F | 45°F 2020 | -25°F 2008 | 15% | 14% |
| Dec 23 | 22°F | 6°F | 42°F 2005 | -32°F 2013 | 15% | 14% |
| Dec 24 | 22°F | 6°F | 42°F 2005 | -22°F 2000 | 15% | 14% |
| Dec 25 | 22°F | 5°F | 42°F 2011 | -16°F 2017 | 15% | 14% |
| Dec 26 | 22°F | 5°F | 50°F 2005 | -22°F 2017 | 15% | 14% |
| Dec 27 | 21°F | 5°F | 43°F 1999 | -24°F 2017 | 15% | 15% |
| Dec 28 | 21°F | 5°F | 47°F 1999 | -23°F 2021 | 15% | 15% |
| Dec 29 | 21°F | 4°F | 49°F 1999 | -23°F 2021 | 15% | 15% |
| Dec 30 | 21°F | 4°F | 37°F 2011 | -30°F 2008 | 15% | 15% |
| Dec 31 | 20°F | 4°F | 39°F 1999 | -27°F 2017 | 15% | 15% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 8:13 AM, sunset 4:56 PM
- December 31
- sunrise 8:34 AM, sunset 5:03 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00323376 (Garrison), public domain. Records: NOAA GHCN-Daily, station USW00094041, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.