Simpson Weather in December
Average highs run from 39°F on December 1 to 30°F on December 31, and lows from 22°F to 15°F. Normal precipitation for the month is 3.97 in over about 13 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
- 34°F
- Average low
- 19°F
- Precipitation
- 3.97 in
- Snowfall
- 14.6 in
- Record high
- 71°FDec 1, 2006
- Record low
- -9°FDec 24, 1989
- Chance of a freeze
- 100%
- Daylight
- 9 h 24 min to 9 h 13 min
- Cloud cover
- 73%
- Humidity
- 89%
- Dew point
- 25°F
- Wind
- 6.0 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 | 39°F | 22°F | 71°F 2006 | 8°F 1976 | 41% | 15% |
| Dec 2 | 38°F | 22°F | 62°F 1980 | 6°F 1976 | 41% | 16% |
| Dec 3 | 38°F | 22°F | 65°F 1998 | 3°F 1976 | 42% | 16% |
| Dec 4 | 37°F | 22°F | 69°F 1998 | 5°F 2002 | 42% | 16% |
| Dec 5 | 37°F | 21°F | 67°F 2001 | 6°F 2025 | 42% | 17% |
| Dec 6 | 37°F | 21°F | 66°F 1998 | 8°F 2007 | 42% | 17% |
| Dec 7 | 36°F | 21°F | 69°F 1998 | 9°F 1970 | 42% | 18% |
| Dec 8 | 36°F | 21°F | 61°F 1980 | 8°F 1976 | 42% | 18% |
| Dec 9 | 36°F | 20°F | 64°F 1966 | 3°F 2025 | 42% | 18% |
| Dec 10 | 35°F | 20°F | 65°F 1966 | 4°F 1958 | 43% | 18% |
| Dec 11 | 35°F | 20°F | 65°F 2021 | -1°F 1958 | 43% | 19% |
| Dec 12 | 35°F | 20°F | 64°F 1979 | -5°F 1988 | 43% | 19% |
| Dec 13 | 35°F | 19°F | 66°F 2015 | 2°F 1960 | 43% | 19% |
| Dec 14 | 34°F | 19°F | 66°F 2015 | -5°F 2005 | 43% | 19% |
| Dec 15 | 34°F | 19°F | 60°F 1971 | 6°F 1962 | 43% | 20% |
| Dec 16 | 34°F | 19°F | 65°F 2021 | 3°F 1951 | 43% | 20% |
| Dec 17 | 33°F | 18°F | 61°F 2000 | -4°F 1951 | 43% | 20% |
| Dec 18 | 33°F | 18°F | 53°F 2006 | 2°F 1989 | 43% | 20% |
| Dec 19 | 33°F | 18°F | 57°F 1957 | 2°F 1989 | 43% | 20% |
| Dec 20 | 33°F | 18°F | 63°F 1988 | -2°F 2004 | 43% | 20% |
| Dec 21 | 32°F | 17°F | 65°F 2018 | -1°F 1955 | 43% | 20% |
| Dec 22 | 32°F | 17°F | 66°F 2013 | -1°F 1989 | 43% | 21% |
| Dec 23 | 32°F | 17°F | 64°F 1990 | -2°F 1960 | 43% | 21% |
| Dec 24 | 32°F | 17°F | 68°F 2015 | -9°F 1989 | 43% | 21% |
| Dec 25 | 31°F | 16°F | 64°F 2020 | -7°F 1969 | 43% | 21% |
| Dec 26 | 31°F | 16°F | 60°F 1964 | -2°F 1983 | 43% | 21% |
| Dec 27 | 31°F | 16°F | 55°F 1949 | -1°F 1950 | 43% | 21% |
| Dec 28 | 31°F | 16°F | 63°F 2008 | -4°F 1960 | 43% | 22% |
| Dec 29 | 31°F | 15°F | 67°F 1984 | 1°F 1993 | 43% | 22% |
| Dec 30 | 31°F | 15°F | 58°F 2022 | -2°F 1962 | 43% | 22% |
| Dec 31 | 30°F | 15°F | 63°F 1965 | -4°F 1962 | 43% | 22% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:09 AM, sunset 4:33 PM
- December 31
- sunrise 7:29 AM, sunset 4:42 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00367029 (Pleasant Mt 1 W), public domain. Records: NOAA GHCN-Daily, station USW00014777, 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.