Fort Benton Weather in December
Average highs run from 41°F on December 1 to 34°F on December 31, and lows from 17°F to 10°F. Normal precipitation for the month is 0.47 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
- 37°F
- Average low
- 13°F
- Precipitation
- 0.47 in
- Snowfall
- 7.9 in
- Record high
- 73°FDec 5, 1939
- Record low
- -45°FDec 24, 1983
- Chance of a freeze
- 100%
- Daylight
- 8 h 41 min to 8 h 28 min
- Cloud cover
- 72%
- Humidity
- 76%
- Dew point
- 18°F
- Wind
- 11.6 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 | 41°F | 17°F | 66°F 1969 | -30°F 1897 | 16% | 13% |
| Dec 2 | 41°F | 17°F | 71°F 2021 | -32°F 1985 | 16% | 13% |
| Dec 3 | 40°F | 17°F | 66°F 1987 | -16°F 1970 | 16% | 13% |
| Dec 4 | 40°F | 16°F | 66°F 1939 | -21°F 1972 | 16% | 13% |
| Dec 5 | 40°F | 16°F | 73°F 1939 | -26°F 1950 | 16% | 13% |
| Dec 6 | 39°F | 16°F | 67°F 1987 | -28°F 1972 | 16% | 13% |
| Dec 7 | 39°F | 16°F | 66°F 2023 | -37°F 2013 | 16% | 14% |
| Dec 8 | 39°F | 15°F | 66°F 1940 | -36°F 2013 | 16% | 14% |
| Dec 9 | 38°F | 15°F | 67°F 1957 | -35°F 1977 | 16% | 14% |
| Dec 10 | 38°F | 15°F | 68°F 1939 | -20°F 1977 | 16% | 14% |
| Dec 11 | 38°F | 14°F | 62°F 1993 | -22°F 1961 | 16% | 14% |
| Dec 12 | 37°F | 14°F | 64°F 1895 | -22°F 1961 | 17% | 15% |
| Dec 13 | 37°F | 14°F | 64°F 1998 | -28°F 1963 | 17% | 15% |
| Dec 14 | 37°F | 13°F | 64°F 2002 | -24°F 2009 | 17% | 15% |
| Dec 15 | 37°F | 13°F | 67°F 1962 | -27°F 2008 | 17% | 15% |
| Dec 16 | 36°F | 13°F | 66°F 2025 | -30°F 1979 | 17% | 15% |
| Dec 17 | 36°F | 13°F | 64°F 1976 | -29°F 1964 | 17% | 15% |
| Dec 18 | 36°F | 12°F | 60°F 1988 | -30°F 1983 | 17% | 16% |
| Dec 19 | 36°F | 12°F | 63°F 1941 | -24°F 1983 | 17% | 16% |
| Dec 20 | 35°F | 12°F | 66°F 1894 | -28°F 1949 | 17% | 16% |
| Dec 21 | 35°F | 12°F | 63°F 1954 | -35°F 1990 | 17% | 16% |
| Dec 22 | 35°F | 11°F | 62°F 1954 | -40°F 1990 | 17% | 16% |
| Dec 23 | 35°F | 11°F | 63°F 1994 | -34°F 2022 | 17% | 16% |
| Dec 24 | 35°F | 11°F | 59°F 1950 | -45°F 1983 | 17% | 16% |
| Dec 25 | 35°F | 11°F | 58°F 1956 | -40°F 1983 | 17% | 16% |
| Dec 26 | 35°F | 11°F | 64°F 1980 | -26°F 1996 | 17% | 16% |
| Dec 27 | 34°F | 10°F | 67°F 1980 | -24°F 2021 | 18% | 17% |
| Dec 28 | 34°F | 10°F | 65°F 1999 | -28°F 1968 | 18% | 17% |
| Dec 29 | 34°F | 10°F | 67°F 1956 | -40°F 1968 | 18% | 17% |
| Dec 30 | 34°F | 10°F | 60°F 1956 | -30°F 1968 | 18% | 17% |
| Dec 31 | 34°F | 10°F | 63°F 1963 | -28°F 1992 | 18% | 17% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:51 AM, sunset 4:32 PM
- December 31
- sunrise 8:12 AM, sunset 4:40 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00243113 (Ft Benton), public domain. Records: NOAA GHCN-Daily, station USC00243113, 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.