Dorchester Weather in December
Average highs run from 42°F on December 1 to 33°F on December 31, and lows from 21°F to 13°F. Normal precipitation for the month is 1.10 in over about 6 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
- 36°F
- Average low
- 17°F
- Precipitation
- 1.10 in
- Snowfall
- 5.1 in
- Record high
- 74°FDec 15, 2021
- Record low
- -27°FDec 22, 1983
- Chance of a freeze
- 100%
- Daylight
- 9 h 29 min to 9 h 19 min
- Cloud cover
- 58%
- Humidity
- 79%
- Dew point
- 22°F
- Wind
- 11.2 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 | 42°F | 21°F | 70°F 1998 | 0°F 1985 | 18% | 8% |
| Dec 2 | 42°F | 21°F | 71°F 2021 | -2°F 1985 | 19% | 8% |
| Dec 3 | 41°F | 21°F | 66°F 1998 | 4°F 1989 | 19% | 8% |
| Dec 4 | 41°F | 20°F | 66°F 2001 | -2°F 2005 | 19% | 8% |
| Dec 5 | 40°F | 20°F | 69°F 1989 | -3°F 1950 | 19% | 9% |
| Dec 6 | 40°F | 20°F | 59°F 1988 | -8°F 1950 | 19% | 9% |
| Dec 7 | 39°F | 19°F | 68°F 2024 | -6°F 2005 | 19% | 9% |
| Dec 8 | 39°F | 19°F | 64°F 2020 | -5°F 1976 | 19% | 9% |
| Dec 9 | 38°F | 19°F | 66°F 2020 | -10°F 2005 | 19% | 9% |
| Dec 10 | 38°F | 18°F | 65°F 1990 | -13°F 2009 | 19% | 10% |
| Dec 11 | 37°F | 18°F | 66°F 1990 | -8°F 2000 | 19% | 10% |
| Dec 12 | 37°F | 18°F | 61°F 1980 | -14°F 2000 | 19% | 10% |
| Dec 13 | 37°F | 17°F | 60°F 2006 | -10°F 1972 | 20% | 10% |
| Dec 14 | 36°F | 17°F | 59°F 2006 | -12°F 1989 | 20% | 10% |
| Dec 15 | 36°F | 17°F | 74°F 2021 | -15°F 1989 | 20% | 10% |
| Dec 16 | 36°F | 17°F | 61°F 1976 | -16°F 1989 | 20% | 10% |
| Dec 17 | 35°F | 16°F | 67°F 1980 | -17°F 1981 | 20% | 11% |
| Dec 18 | 35°F | 16°F | 68°F 1976 | -18°F 1983 | 20% | 11% |
| Dec 19 | 35°F | 16°F | 59°F 1979 | -20°F 1989 | 20% | 11% |
| Dec 20 | 34°F | 16°F | 56°F 1979 | -16°F 1973 | 20% | 11% |
| Dec 21 | 34°F | 15°F | 55°F 2019 | -19°F 1989 | 20% | 11% |
| Dec 22 | 34°F | 15°F | 63°F 2020 | -27°F 1983 | 20% | 11% |
| Dec 23 | 34°F | 15°F | 60°F 2021 | -23°F 1989 | 20% | 11% |
| Dec 24 | 34°F | 15°F | 65°F 2021 | -18°F 1983 | 20% | 11% |
| Dec 25 | 33°F | 14°F | 60°F 2016 | -16°F 1983 | 20% | 11% |
| Dec 26 | 33°F | 14°F | 62°F 2025 | -16°F 1948 | 20% | 11% |
| Dec 27 | 33°F | 14°F | 62°F 2013 | -17°F 2017 | 20% | 11% |
| Dec 28 | 33°F | 14°F | 66°F 1984 | -4°F 1983 | 20% | 11% |
| Dec 29 | 33°F | 14°F | 64°F 1999 | -8°F 1990 | 20% | 11% |
| Dec 30 | 33°F | 13°F | 65°F 2004 | -13°F 1976 | 20% | 12% |
| Dec 31 | 33°F | 13°F | 58°F 2025 | -20°F 1973 | 20% | 12% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:33 AM, sunset 5:02 PM
- December 31
- sunrise 7:52 AM, sunset 5:11 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00253065 (Friend 3E), public domain. Records: NOAA GHCN-Daily, station USW00014939, 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.