Is Boston hot in January?
Days are typically cold at 2.9°C, while nights average -4.8°C.
United States · 1991–2020 normal
Boston in
January.
Typical January weather in Boston: 2.9°C by day, -4.8°C at night, 86 mm of rain over 8.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high2.9°C
Typical low-4.8°C
Rain86 mm
Wet days8.8
In the year-round weather comparison, January scores 5 out of 100 (September leads the year at 85). Daylight is calculated as 9 h 24 from latitude 42.36°. Open-water sea temperature is 4.9°C (15 km from the place centre).
January at a glance
What is Boston like in January?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 86 mm across about 9 wet days.
How much daylight is there?
There are about 9 h 24 between sunrise and sunset at mid-month, calculated from the place latitude.
Is January a good time to visit?
January ranks 9 of 12 in our weather comparison; September ranks first.
Event window
Frost-level nights in January
The measured night-time normal is -4.8°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4930956
- NOAA station
- USW00014739 · BOSTON
- Station distance
- 4.1 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Boston is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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