Mandan Weather in December
Average highs run from 33°F on December 1 to 23°F on December 31, and lows from 13°F to 4°F. Normal precipitation for the month is 0.52 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
- 27°F
- Average low
- 8°F
- Precipitation
- 0.52 in
- Snowfall
- 10.1 in
- Record high
- 66°FDec 5, 1979
- Record low
- -46°FDec 28, 1916
- Chance of a freeze
- 100%
- Daylight
- 8 h 49 min to 8 h 36 min
- Cloud cover
- 67%
- Humidity
- 84%
- Dew point
- 14°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 | 33°F | 13°F | 64°F 2021 | -16°F 2014 | 13% | 25% |
| Dec 2 | 33°F | 13°F | 63°F 1969 | -22°F 1985 | 14% | 25% |
| Dec 3 | 32°F | 13°F | 60°F 1916 | -21°F 1985 | 14% | 26% |
| Dec 4 | 32°F | 12°F | 58°F 1939 | -19°F 1927 | 14% | 26% |
| Dec 5 | 31°F | 12°F | 66°F 1979 | -16°F 1972 | 14% | 26% |
| Dec 6 | 31°F | 12°F | 66°F 1939 | -28°F 1972 | 14% | 27% |
| Dec 7 | 31°F | 11°F | 57°F 1918 | -27°F 1972 | 14% | 27% |
| Dec 8 | 30°F | 11°F | 60°F 1939 | -30°F 1927 | 14% | 27% |
| Dec 9 | 30°F | 11°F | 63°F 1939 | -30°F 1927 | 14% | 28% |
| Dec 10 | 29°F | 10°F | 61°F 2015 | -29°F 1917 | 14% | 28% |
| Dec 11 | 29°F | 10°F | 64°F 1939 | -28°F 1917 | 15% | 28% |
| Dec 12 | 29°F | 10°F | 61°F 2004 | -25°F 1917 | 15% | 29% |
| Dec 13 | 28°F | 9°F | 51°F 1913 | -37°F 1917 | 15% | 29% |
| Dec 14 | 28°F | 9°F | 52°F 1939 | -27°F 1917 | 15% | 29% |
| Dec 15 | 27°F | 9°F | 61°F 1998 | -27°F 1989 | 15% | 30% |
| Dec 16 | 27°F | 8°F | 54°F 1939 | -27°F 1989 | 15% | 30% |
| Dec 17 | 27°F | 8°F | 59°F 1997 | -24°F 1924 | 16% | 30% |
| Dec 18 | 26°F | 8°F | 56°F 1997 | -32°F 1951 | 16% | 31% |
| Dec 19 | 26°F | 7°F | 57°F 1979 | -35°F 1983 | 16% | 31% |
| Dec 20 | 26°F | 7°F | 55°F 1979 | -40°F 1916 | 16% | 31% |
| Dec 21 | 25°F | 7°F | 53°F 1957 | -41°F 1916 | 16% | 31% |
| Dec 22 | 25°F | 6°F | 51°F 1991 | -33°F 1989 | 16% | 32% |
| Dec 23 | 25°F | 6°F | 56°F 1954 | -38°F 1983 | 16% | 32% |
| Dec 24 | 25°F | 6°F | 47°F 1943 | -38°F 1983 | 16% | 32% |
| Dec 25 | 24°F | 6°F | 47°F 2005 | -27°F 1996 | 16% | 32% |
| Dec 26 | 24°F | 5°F | 49°F 1963 | -33°F 1990 | 16% | 32% |
| Dec 27 | 24°F | 5°F | 54°F 2005 | -33°F 1990 | 16% | 32% |
| Dec 28 | 24°F | 5°F | 52°F 1980 | -46°F 1916 | 16% | 33% |
| Dec 29 | 24°F | 5°F | 51°F 1999 | -36°F 1917 | 17% | 33% |
| Dec 30 | 23°F | 5°F | 54°F 1999 | -33°F 1990 | 17% | 33% |
| Dec 31 | 23°F | 4°F | 47°F 1956 | -36°F 1967 | 17% | 33% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 8:08 AM, sunset 4:57 PM
- December 31
- sunrise 8:29 AM, sunset 5:05 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00325479 (Mandan Exp Stn), public domain. Records: NOAA GHCN-Daily, station USC00325479, 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.