Boston weather in January
January in Boston: freezing, rainy, with clean air — one of the weakest months to visit.
#12 of 12 months in Boston · #504 of 604 destinations to visit in January · comfort 46/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Boston climate normals — January
| Daytime high | 3°C / 38°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -4°C / 25°F | |
| Feels like (high) | -1°C / 30°F | |
| Rainfall | 98 mm / 3.9 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 71% | 💧 humid |
| Dew point | -6°C / 22°F | |
| Sunshine | 5.8 h/day | |
| Daylight | 9.5 h | |
| Wind | 23 km/h / 14 mph | |
| Snowfall | 17.9 cm / 7 in | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Boston in January — FAQ
- Is January a good time to visit Boston?
- January in Boston: freezing, rainy, with clean air — one of the weakest months to visit. It ranks #12 of 12 months for Boston on SeasonMap's comfort score (46/100).
- What is the weather like in Boston in January?
- In January, Boston averages a daily high of 3.3°C and a low of -4°C, with about 98.2 mm of rain over roughly 10.8 rainy days.
- What is the air quality in Boston in January?
- Boston has a mean US Air Quality Index of about 41 in January.
- Does it snow in Boston in January?
- Boston sees roughly 17.9 cm of snowfall in January.