Williamstown Weather in December
Average highs run from 39°F on December 1 to 30°F on December 31, and lows from 20°F to 9°F. Normal precipitation for the month is 3.70 in over about 11 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
- 35°F
- Average low
- 15°F
- Precipitation
- 3.70 in
- Snowfall
- 21.3 in
- Record high
- 67°FDec 6, 2001
- Record low
- -27°FDec 26, 1980
- Chance of a freeze
- 100%
- Daylight
- 9 h 08 min to 8 h 56 min
- Cloud cover
- 77%
- Humidity
- 92%
- Dew point
- 20°F
- Wind
- 5.8 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 | 20°F | 61°F 1998 | -7°F 1958 | 36% | 15% |
| Dec 2 | 39°F | 20°F | 54°F 1970 | -12°F 1989 | 36% | 16% |
| Dec 3 | 39°F | 20°F | 59°F 2009 | -8°F 1976 | 36% | 16% |
| Dec 4 | 38°F | 19°F | 64°F 1982 | -7°F 1966 | 36% | 16% |
| Dec 5 | 38°F | 19°F | 60°F 1973 | -8°F 2025 | 36% | 17% |
| Dec 6 | 38°F | 18°F | 67°F 2001 | -4°F 1954 | 36% | 17% |
| Dec 7 | 37°F | 18°F | 67°F 1998 | -6°F 1964 | 36% | 18% |
| Dec 8 | 37°F | 18°F | 61°F 1951 | -10°F 1989 | 36% | 18% |
| Dec 9 | 37°F | 17°F | 60°F 1966 | -16°F 1989 | 36% | 19% |
| Dec 10 | 36°F | 17°F | 55°F 1966 | -14°F 1949 | 36% | 19% |
| Dec 11 | 36°F | 16°F | 58°F 1966 | -20°F 1958 | 36% | 20% |
| Dec 12 | 36°F | 16°F | 60°F 1979 | -13°F 1977 | 36% | 20% |
| Dec 13 | 35°F | 16°F | 55°F 1984 | -12°F 1962 | 36% | 20% |
| Dec 14 | 35°F | 15°F | 57°F 1975 | -16°F 1976 | 36% | 21% |
| Dec 15 | 35°F | 15°F | 57°F 1975 | -13°F 1989 | 36% | 21% |
| Dec 16 | 34°F | 14°F | 63°F 2021 | -19°F 1951 | 36% | 21% |
| Dec 17 | 34°F | 14°F | 63°F 2021 | -20°F 2013 | 37% | 22% |
| Dec 18 | 34°F | 14°F | 59°F 2023 | -10°F 1988 | 37% | 22% |
| Dec 19 | 33°F | 13°F | 52°F 2025 | -19°F 1985 | 37% | 22% |
| Dec 20 | 33°F | 13°F | 56°F 1957 | -19°F 1951 | 37% | 22% |
| Dec 21 | 33°F | 13°F | 56°F 1957 | -22°F 1955 | 37% | 23% |
| Dec 22 | 33°F | 12°F | 58°F 1949 | -23°F 1955 | 37% | 23% |
| Dec 23 | 32°F | 12°F | 57°F 1949 | -21°F 1955 | 37% | 23% |
| Dec 24 | 32°F | 11°F | 66°F 2015 | -23°F 1989 | 37% | 23% |
| Dec 25 | 32°F | 11°F | 63°F 1982 | -25°F 1980 | 37% | 24% |
| Dec 26 | 32°F | 11°F | 63°F 1982 | -27°F 1980 | 36% | 24% |
| Dec 27 | 31°F | 11°F | 56°F 1949 | -24°F 1968 | 36% | 24% |
| Dec 28 | 31°F | 10°F | 63°F 1982 | -19°F 1960 | 36% | 24% |
| Dec 29 | 31°F | 10°F | 61°F 1982 | -19°F 2017 | 36% | 24% |
| Dec 30 | 31°F | 10°F | 58°F 2022 | -17°F 2017 | 36% | 25% |
| Dec 31 | 30°F | 9°F | 61°F 2022 | -19°F 1963 | 36% | 25% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:05 AM, sunset 4:13 PM
- December 31
- sunrise 7:25 AM, sunset 4:21 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00435733 (Northfield), public domain. Records: NOAA GHCN-Daily, station USW00094705, 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.