Williamstown Weather in December
Average highs run from 50°F on December 1 to 42°F on December 31, and lows from 32°F to 27°F. Normal precipitation for the month is 3.51 in over about 14 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
- 46°F
- Average low
- 29°F
- Precipitation
- 3.51 in
- Snowfall
- 2.8 in
- Record high
- 74°FDec 3, 1982
- Record low
- -22°FDec 22, 1989
- Chance of a freeze
- 100%
- Daylight
- 9 h 40 min to 9 h 31 min
- Cloud cover
- 72%
- Humidity
- 85%
- Dew point
- 30°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 | 50°F | 32°F | 68°F 1970 | 0°F 1958 | 42% | 6% |
| Dec 2 | 49°F | 32°F | 73°F 1982 | 10°F 1930 | 42% | 6% |
| Dec 3 | 49°F | 32°F | 74°F 1982 | -3°F 1929 | 42% | 6% |
| Dec 4 | 49°F | 32°F | 73°F 1998 | 10°F 1929 | 43% | 7% |
| Dec 5 | 48°F | 31°F | 72°F 2001 | 11°F 1991 | 43% | 7% |
| Dec 6 | 48°F | 31°F | 72°F 1998 | 7°F 1977 | 43% | 7% |
| Dec 7 | 48°F | 31°F | 70°F 1956 | -2°F 1977 | 44% | 7% |
| Dec 8 | 48°F | 31°F | 68°F 1916 | 7°F 1977 | 44% | 7% |
| Dec 9 | 47°F | 31°F | 66°F 1946 | -9°F 1917 | 44% | 8% |
| Dec 10 | 47°F | 30°F | 69°F 1971 | -10°F 1917 | 45% | 8% |
| Dec 11 | 47°F | 30°F | 68°F 1985 | -10°F 1917 | 45% | 8% |
| Dec 12 | 46°F | 30°F | 66°F 1931 | -6°F 1962 | 46% | 9% |
| Dec 13 | 46°F | 30°F | 67°F 1984 | -7°F 1962 | 46% | 9% |
| Dec 14 | 46°F | 29°F | 67°F 1927 | -4°F 1962 | 46% | 9% |
| Dec 15 | 46°F | 29°F | 67°F 1971 | -9°F 1914 | 47% | 10% |
| Dec 16 | 45°F | 29°F | 68°F 1984 | -9°F 1989 | 47% | 10% |
| Dec 17 | 45°F | 29°F | 65°F 1984 | -6°F 1989 | 47% | 10% |
| Dec 18 | 45°F | 29°F | 66°F 1967 | 0°F 1953 | 47% | 11% |
| Dec 19 | 45°F | 29°F | 65°F 1924 | -9°F 1963 | 47% | 11% |
| Dec 20 | 44°F | 28°F | 65°F 1931 | -9°F 1963 | 47% | 12% |
| Dec 21 | 44°F | 28°F | 69°F 1967 | -8°F 1963 | 47% | 12% |
| Dec 22 | 44°F | 28°F | 68°F 1967 | -22°F 1989 | 48% | 12% |
| Dec 23 | 44°F | 28°F | 68°F 1933 | -13°F 1989 | 48% | 13% |
| Dec 24 | 43°F | 28°F | 66°F 1932 | -8°F 1983 | 48% | 13% |
| Dec 25 | 43°F | 28°F | 69°F 1932 | -15°F 1983 | 48% | 14% |
| Dec 26 | 43°F | 27°F | 65°F 1922 | -2°F 1983 | 48% | 14% |
| Dec 27 | 43°F | 27°F | 68°F 1942 | -9°F 1935 | 48% | 14% |
| Dec 28 | 43°F | 27°F | 68°F 1959 | 0°F 1924 | 48% | 15% |
| Dec 29 | 43°F | 27°F | 66°F 1984 | -3°F 1961 | 48% | 15% |
| Dec 30 | 42°F | 27°F | 66°F 1984 | -7°F 1983 | 48% | 15% |
| Dec 31 | 42°F | 27°F | 69°F 1951 | -3°F 1909 | 48% | 16% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:37 AM, sunset 5:17 PM
- December 31
- sunrise 7:56 AM, sunset 5:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00158714 (Williamstown), public domain. Records: NOAA GHCN-Daily, station USC00158714, 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.