Custer County Weather in December
Average highs run from 55°F on December 1 to 50°F on December 31, and lows from 31°F to 25°F. Normal precipitation for the month is 1.46 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
- 51°F
- Average low
- 27°F
- Precipitation
- 1.46 in
- Snowfall
- 1.4 in
- Record high
- 89°FDec 24, 1955
- Record low
- -11°FDec 23, 1989
- Chance of a freeze
- 100%
- Daylight
- 9 h 56 min to 9 h 48 min
- Cloud cover
- 53%
- Humidity
- 70%
- Dew point
- 28°F
- Wind
- 10.7 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 | 55°F | 31°F | 79°F 1950 | 10°F 1985 | 16% | 2% |
| Dec 2 | 54°F | 30°F | 76°F 1975 | 7°F 1985 | 16% | 2% |
| Dec 3 | 54°F | 30°F | 73°F 1954 | 12°F 1950 | 16% | 2% |
| Dec 4 | 54°F | 30°F | 79°F 1954 | 15°F 1955 | 16% | 2% |
| Dec 5 | 53°F | 29°F | 80°F 1956 | 16°F 1950 | 16% | 3% |
| Dec 6 | 53°F | 29°F | 80°F 1939 | 4°F 1950 | 15% | 3% |
| Dec 7 | 53°F | 29°F | 80°F 1966 | -1°F 1950 | 15% | 3% |
| Dec 8 | 52°F | 29°F | 73°F 1966 | 11°F 1950 | 15% | 3% |
| Dec 9 | 52°F | 28°F | 74°F 1993 | 8°F 1978 | 15% | 3% |
| Dec 10 | 52°F | 28°F | 79°F 1939 | 11°F 1977 | 15% | 3% |
| Dec 11 | 52°F | 28°F | 79°F 1939 | 10°F 1966 | 14% | 3% |
| Dec 12 | 51°F | 28°F | 75°F 1939 | 5°F 1961 | 14% | 3% |
| Dec 13 | 51°F | 27°F | 72°F 1995 | 7°F 1961 | 14% | 3% |
| Dec 14 | 51°F | 27°F | 75°F 1948 | 4°F 1958 | 14% | 3% |
| Dec 15 | 51°F | 27°F | 75°F 1939 | 1°F 1989 | 14% | 3% |
| Dec 16 | 51°F | 27°F | 77°F 1948 | -5°F 1972 | 14% | 3% |
| Dec 17 | 51°F | 27°F | 77°F 1939 | 5°F 1964 | 14% | 3% |
| Dec 18 | 50°F | 27°F | 74°F 1978 | 3°F 1964 | 14% | 3% |
| Dec 19 | 50°F | 26°F | 73°F 1978 | 3°F 1983 | 14% | 3% |
| Dec 20 | 50°F | 26°F | 71°F 1954 | 3°F 1983 | 14% | 3% |
| Dec 21 | 50°F | 26°F | 67°F 1946 | -3°F 1989 | 14% | 3% |
| Dec 22 | 50°F | 26°F | 80°F 1969 | -5°F 1983 | 14% | 3% |
| Dec 23 | 50°F | 26°F | 76°F 1955 | -11°F 1989 | 14% | 3% |
| Dec 24 | 50°F | 26°F | 89°F 1955 | 2°F 1983 | 14% | 3% |
| Dec 25 | 50°F | 26°F | 74°F 1950 | 3°F 1983 | 14% | 3% |
| Dec 26 | 50°F | 26°F | 70°F 1988 | 8°F 1983 | 14% | 3% |
| Dec 27 | 50°F | 26°F | 77°F 1946 | 11°F 1951 | 14% | 3% |
| Dec 28 | 50°F | 26°F | 76°F 1947 | 6°F 1950 | 14% | 3% |
| Dec 29 | 50°F | 26°F | 78°F 1951 | -1°F 1983 | 14% | 3% |
| Dec 30 | 50°F | 25°F | 74°F 1951 | 2°F 1983 | 14% | 3% |
| Dec 31 | 50°F | 25°F | 79°F 1951 | 2°F 1968 | 14% | 3% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:27 AM, sunset 5:23 PM
- December 31
- sunrise 7:45 AM, sunset 5:33 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00341909 (Clinton), public domain. Records: NOAA GHCN-Daily, station USC00341909, 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.