Mercer Weather in December
Average highs run from 29°F on December 1 to 21°F on December 31, and lows from 15°F to 4°F. Normal precipitation for the month is 1.42 in over about 10 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
- 1.42 in
- Snowfall
- 15.3 in
- Record high
- 58°FDec 2, 1998
- Record low
- -41°FDec 9, 1927
- Chance of a freeze
- 100%
- Daylight
- 8 h 54 min to 8 h 41 min
- Cloud cover
- 76%
- Humidity
- 94%
- Dew point
- 14°F
- Wind
- 9.4 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 | 29°F | 15°F | 53°F 1962 | -25°F 1919 | 32% | 23% |
| Dec 2 | 29°F | 14°F | 58°F 1998 | -21°F 1976 | 32% | 24% |
| Dec 3 | 29°F | 14°F | 58°F 1998 | -25°F 1919 | 32% | 24% |
| Dec 4 | 28°F | 13°F | 53°F 1951 | -19°F 1972 | 32% | 24% |
| Dec 5 | 28°F | 13°F | 55°F 1941 | -21°F 1991 | 32% | 25% |
| Dec 6 | 28°F | 12°F | 54°F 1939 | -25°F 1926 | 32% | 25% |
| Dec 7 | 27°F | 12°F | 43°F 1939 | -30°F 1936 | 32% | 25% |
| Dec 8 | 27°F | 12°F | 48°F 1915 | -24°F 1976 | 32% | 25% |
| Dec 9 | 27°F | 11°F | 53°F 1946 | -41°F 1927 | 32% | 25% |
| Dec 10 | 26°F | 11°F | 47°F 1928 | -30°F 1919 | 32% | 25% |
| Dec 11 | 26°F | 10°F | 55°F 1913 | -30°F 1977 | 32% | 26% |
| Dec 12 | 26°F | 10°F | 47°F 1913 | -27°F 1989 | 32% | 26% |
| Dec 13 | 25°F | 10°F | 48°F 1913 | -27°F 1989 | 32% | 26% |
| Dec 14 | 25°F | 9°F | 48°F 1998 | -21°F 1950 | 32% | 26% |
| Dec 15 | 25°F | 9°F | 45°F 1939 | -28°F 1917 | 32% | 26% |
| Dec 16 | 25°F | 9°F | 48°F 1952 | -27°F 1919 | 32% | 26% |
| Dec 17 | 24°F | 8°F | 43°F 1913 | -28°F 1919 | 32% | 26% |
| Dec 18 | 24°F | 8°F | 43°F 1997 | -28°F 1926 | 32% | 26% |
| Dec 19 | 24°F | 8°F | 48°F 1923 | -34°F 1983 | 32% | 26% |
| Dec 20 | 24°F | 7°F | 42°F 1956 | -34°F 1983 | 32% | 26% |
| Dec 21 | 23°F | 7°F | 48°F 1923 | -36°F 1989 | 32% | 26% |
| Dec 22 | 23°F | 7°F | 40°F 1957 | -30°F 1916 | 32% | 26% |
| Dec 23 | 23°F | 6°F | 48°F 1923 | -33°F 1983 | 32% | 27% |
| Dec 24 | 23°F | 6°F | 45°F 1994 | -31°F 1924 | 32% | 27% |
| Dec 25 | 22°F | 6°F | 47°F 1940 | -32°F 1920 | 32% | 27% |
| Dec 26 | 22°F | 5°F | 45°F 1936 | -32°F 1996 | 32% | 27% |
| Dec 27 | 22°F | 5°F | 43°F 1936 | -25°F 1924 | 32% | 27% |
| Dec 28 | 22°F | 5°F | 43°F 2011 | -40°F 1933 | 32% | 27% |
| Dec 29 | 22°F | 4°F | 38°F 1979 | -34°F 1917 | 32% | 27% |
| Dec 30 | 22°F | 4°F | 41°F 1929 | -31°F 1938 | 32% | 27% |
| Dec 31 | 21°F | 4°F | 48°F 1933 | -31°F 1946 | 32% | 27% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:22 AM, sunset 4:16 PM
- December 31
- sunrise 7:43 AM, sunset 4:24 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00477092 (Rest Lake), public domain. Records: NOAA GHCN-Daily, station USC00477092, 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.