Union County Weather in December
Average highs run from 50°F on December 1 to 46°F on December 31, and lows from 22°F to 20°F. Normal precipitation for the month is 0.46 in over about 2 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
- 20°F
- Precipitation
- 0.46 in
- Snowfall
- 5.1 in
- Record high
- 83°FDec 23, 1955
- Record low
- -14°FDec 21, 1983
- Chance of a freeze
- 100%
- Daylight
- 9 h 52 min to 9 h 43 min
- Cloud cover
- 51%
- Humidity
- 55%
- Dew point
- 17°F
- Wind
- 12.1 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 | 22°F | 75°F 1926 | 6°F 1985 | 8% | 4% |
| Dec 2 | 50°F | 22°F | 76°F 1926 | 2°F 1985 | 8% | 4% |
| Dec 3 | 49°F | 22°F | 74°F 1926 | 4°F 1899 | 8% | 4% |
| Dec 4 | 49°F | 22°F | 76°F 2007 | 4°F 1964 | 7% | 4% |
| Dec 5 | 49°F | 21°F | 75°F 2021 | -2°F 1972 | 7% | 4% |
| Dec 6 | 48°F | 21°F | 76°F 1939 | -6°F 1972 | 7% | 4% |
| Dec 7 | 48°F | 21°F | 76°F 1987 | -5°F 2005 | 7% | 4% |
| Dec 8 | 48°F | 21°F | 74°F 1897 | -7°F 1978 | 7% | 4% |
| Dec 9 | 47°F | 21°F | 75°F 1938 | -12°F 1919 | 7% | 4% |
| Dec 10 | 47°F | 20°F | 74°F 1929 | -2°F 1932 | 7% | 4% |
| Dec 11 | 47°F | 20°F | 82°F 2025 | -1°F 1917 | 7% | 4% |
| Dec 12 | 47°F | 20°F | 74°F 1921 | -5°F 1899 | 7% | 4% |
| Dec 13 | 47°F | 20°F | 81°F 1921 | 1°F 1919 | 7% | 4% |
| Dec 14 | 46°F | 20°F | 73°F 2010 | -3°F 1987 | 7% | 4% |
| Dec 15 | 46°F | 20°F | 76°F 1929 | 3°F 1926 | 7% | 5% |
| Dec 16 | 46°F | 20°F | 75°F 1929 | 4°F 1983 | 7% | 5% |
| Dec 17 | 46°F | 20°F | 80°F 1980 | -5°F 2016 | 7% | 5% |
| Dec 18 | 46°F | 20°F | 72°F 1980 | -4°F 1996 | 7% | 5% |
| Dec 19 | 46°F | 20°F | 72°F 1917 | -8°F 1924 | 7% | 5% |
| Dec 20 | 46°F | 20°F | 75°F 1917 | -6°F 1924 | 7% | 5% |
| Dec 21 | 46°F | 20°F | 73°F 1915 | -14°F 1983 | 8% | 5% |
| Dec 22 | 46°F | 20°F | 80°F 2025 | -12°F 1983 | 8% | 5% |
| Dec 23 | 46°F | 20°F | 83°F 1955 | -13°F 1990 | 8% | 5% |
| Dec 24 | 46°F | 20°F | 77°F 1955 | -12°F 1924 | 8% | 5% |
| Dec 25 | 46°F | 20°F | 75°F 2025 | -2°F 1962 | 8% | 5% |
| Dec 26 | 46°F | 20°F | 74°F 2005 | -2°F 1962 | 8% | 5% |
| Dec 27 | 46°F | 20°F | 74°F 1928 | 1°F 1924 | 8% | 5% |
| Dec 28 | 46°F | 20°F | 74°F 1920 | -3°F 1983 | 8% | 5% |
| Dec 29 | 46°F | 20°F | 74°F 2017 | -4°F 1983 | 8% | 5% |
| Dec 30 | 46°F | 20°F | 76°F 1919 | -4°F 1990 | 8% | 5% |
| Dec 31 | 46°F | 20°F | 70°F 1942 | -8°F 1923 | 8% | 5% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 6:47 AM, sunset 4:39 PM
- December 31
- sunrise 7:06 AM, sunset 4:49 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00293706 (Grenville), public domain. Records: NOAA GHCN-Daily, station USW00023051, 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.