Boston Weather in January
Average highs run from 63°F on January 1 to 64°F on January 31, and lows from 41°F to 41°F. Normal precipitation for the month is 4.81 in over about 9 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 63°F
- Average low
- 40°F
- Precipitation
- 4.81 in
- Record high
- 87°FJan 3, 2004
- Record low
- 0°FJan 21, 1985
- Chance of a freeze
- 96%
- Daylight
- 10 h 12 min to 10 h 43 min
- Cloud cover
- 56%
- Humidity
- 82%
- Dew point
- 43°F
- Wind
- 7.8 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Jan 1 | 63°F | 41°F | 81°F 2004 | 20°F 2001 | 29% |
| Jan 2 | 63°F | 41°F | 82°F 2022 | 16°F 1928 | 29% |
| Jan 3 | 63°F | 40°F | 87°F 2004 | 17°F 1979 | 30% |
| Jan 4 | 63°F | 40°F | 86°F 2004 | 20°F 1928 | 30% |
| Jan 5 | 63°F | 40°F | 87°F 2004 | 20°F 1928 | 30% |
| Jan 6 | 63°F | 40°F | 79°F 1934 | 18°F 1969 | 30% |
| Jan 7 | 62°F | 40°F | 78°F 1989 | 17°F 2014 | 30% |
| Jan 8 | 62°F | 40°F | 80°F 1933 | 15°F 1970 | 30% |
| Jan 9 | 62°F | 40°F | 83°F 1937 | 11°F 1970 | 30% |
| Jan 10 | 62°F | 40°F | 80°F 1937 | 15°F 1970 | 30% |
| Jan 11 | 62°F | 40°F | 84°F 1937 | 8°F 1982 | 30% |
| Jan 12 | 62°F | 40°F | 81°F 1937 | 16°F 1982 | 30% |
| Jan 13 | 62°F | 40°F | 80°F 1937 | 12°F 1962 | 30% |
| Jan 14 | 62°F | 40°F | 80°F 1937 | 19°F 1964 | 30% |
| Jan 15 | 62°F | 40°F | 85°F 1937 | 18°F 1964 | 30% |
| Jan 16 | 62°F | 40°F | 80°F 1950 | 12°F 1972 | 30% |
| Jan 17 | 62°F | 40°F | 81°F 1943 | 13°F 1977 | 29% |
| Jan 18 | 62°F | 40°F | 82°F 1937 | 19°F 1976 | 29% |
| Jan 19 | 62°F | 40°F | 82°F 1937 | 11°F 1977 | 29% |
| Jan 20 | 63°F | 40°F | 83°F 1937 | 16°F 1940 | 29% |
| Jan 21 | 63°F | 40°F | 83°F 1937 | 0°F 1985 | 28% |
| Jan 22 | 63°F | 40°F | 82°F 1937 | 15°F 1985 | 28% |
| Jan 23 | 63°F | 40°F | 80°F 1927 | 19°F 1960 | 28% |
| Jan 24 | 63°F | 40°F | 82°F 1929 | 12°F 1963 | 28% |
| Jan 25 | 63°F | 40°F | 84°F 2004 | 18°F 1963 | 28% |
| Jan 26 | 63°F | 41°F | 83°F 1950 | 18°F 1940 | 28% |
| Jan 27 | 63°F | 41°F | 81°F 1944 | 15°F 1940 | 28% |
| Jan 28 | 63°F | 41°F | 80°F 1944 | 14°F 1986 | 28% |
| Jan 29 | 64°F | 41°F | 83°F 1975 | 21°F 1940 | 28% |
| Jan 30 | 64°F | 41°F | 84°F 1974 | 21°F 1934 | 28% |
| Jan 31 | 64°F | 41°F | 82°F 1950 | 19°F 2026 | 27% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EST).
- January 1
- sunrise 7:33 AM, sunset 5:45 PM
- January 31
- sunrise 7:27 AM, sunset 6:10 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00085879 (Monticello 5 Se), public domain. Records: NOAA GHCN-Daily, station USC00096087, 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.