Grundy Weather in December
Average highs run from 50°F on December 1 to 43°F on December 31, and lows from 30°F to 26°F. Normal precipitation for the month is 3.70 in over about 13 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
- 46°F
- Average low
- 28°F
- Precipitation
- 3.70 in
- Snowfall
- 2.4 in
- Record high
- 79°FDec 6, 2001
- Record low
- -15°FDec 24, 1989
- Chance of a freeze
- 100%
- Daylight
- 9 h 47 min to 9 h 39 min
- Cloud cover
- 72%
- Humidity
- 83%
- Dew point
- 30°F
- Wind
- 5.1 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 | 50°F | 30°F | 72°F 1991 | 14°F 1999 | 37% | 5% |
| Dec 2 | 50°F | 30°F | 67°F 2006 | 14°F 1999 | 38% | 6% |
| Dec 3 | 49°F | 30°F | 70°F 1991 | 16°F 2008 | 38% | 6% |
| Dec 4 | 49°F | 29°F | 68°F 2012 | 11°F 2000 | 38% | 6% |
| Dec 5 | 49°F | 29°F | 67°F 1998 | 12°F 1989 | 39% | 7% |
| Dec 6 | 48°F | 29°F | 79°F 2001 | 12°F 1992 | 39% | 7% |
| Dec 7 | 48°F | 29°F | 67°F 1998 | 11°F 2024 | 40% | 7% |
| Dec 8 | 48°F | 29°F | 70°F 2004 | 2°F 1995 | 40% | 7% |
| Dec 9 | 48°F | 29°F | 66°F 1999 | 2°F 2010 | 40% | 8% |
| Dec 10 | 47°F | 29°F | 67°F 2012 | 2°F 1995 | 40% | 8% |
| Dec 11 | 47°F | 29°F | 64°F 2024 | 1°F 1995 | 41% | 8% |
| Dec 12 | 47°F | 29°F | 69°F 2007 | 7°F 1995 | 41% | 8% |
| Dec 13 | 46°F | 28°F | 66°F 2015 | 11°F 2009 | 41% | 9% |
| Dec 14 | 46°F | 28°F | 71°F 2015 | 10°F 2010 | 41% | 9% |
| Dec 15 | 46°F | 28°F | 72°F 2015 | 4°F 2025 | 41% | 9% |
| Dec 16 | 46°F | 28°F | 73°F 2015 | 3°F 1989 | 42% | 9% |
| Dec 17 | 45°F | 28°F | 68°F 2015 | -3°F 1989 | 42% | 10% |
| Dec 18 | 45°F | 28°F | 67°F 2016 | -1°F 1989 | 42% | 10% |
| Dec 19 | 45°F | 28°F | 65°F 2006 | 10°F 1991 | 42% | 10% |
| Dec 20 | 45°F | 27°F | 63°F 2002 | -3°F 2004 | 42% | 11% |
| Dec 21 | 45°F | 27°F | 59°F 2025 | -3°F 2004 | 42% | 11% |
| Dec 22 | 44°F | 27°F | 71°F 2013 | -4°F 1989 | 42% | 11% |
| Dec 23 | 44°F | 27°F | 70°F 2013 | -14°F 1989 | 42% | 11% |
| Dec 24 | 44°F | 27°F | 65°F 1996 | -15°F 1989 | 43% | 12% |
| Dec 25 | 44°F | 27°F | 68°F 2019 | -2°F 1989 | 43% | 12% |
| Dec 26 | 44°F | 27°F | 66°F 2019 | 5°F 2000 | 43% | 12% |
| Dec 27 | 44°F | 26°F | 70°F 2019 | -1°F 1989 | 43% | 13% |
| Dec 28 | 44°F | 26°F | 74°F 2015 | 5°F 1989 | 43% | 13% |
| Dec 29 | 43°F | 26°F | 69°F 2021 | 5°F 2010 | 43% | 13% |
| Dec 30 | 43°F | 26°F | 70°F 2019 | 10°F 1995 | 43% | 13% |
| Dec 31 | 43°F | 26°F | 64°F 1992 | 9°F 2001 | 43% | 13% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:24 AM, sunset 5:11 PM
- December 31
- sunrise 7:42 AM, sunset 5:21 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00443640 (Grundy), public domain. Records: NOAA GHCN-Daily, station USC00447174, 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.