Weather in Boston in January 2025
- January is usually the coldest month of the year in Boston;
Average weather
Average temperature in Boston in January
The temperature in January is +6°C on average, with a range between a maximum of +15°C during the day and a minimum of -5°C at night.
The average maximum temperature goes down 40% by the end of the month, compared with the beginning of the month, from +13°C to +5°C.
Is Boston warm or cold in January?
Boston is typically cool in January.
Maximum temperatures go down compared to the previous month from +5°C to +3°C. The minimum temperature also goes down from -2°C to -5°C.
Pack a sweater and a jacket as there will be cooler temperatures.
January is the coldest month in Boston, here is the comparison with other months:
Water temperature in Boston in January
Water in Boston in January is Cold. It varies from +3°C to +7°C, with an average of +5°C. Note that the air temperature is lower than the water temperature, averaging around +3°C.
The water temperature in January is one of the coldest of the entire year:
Can you swim in Boston in January?
Climate in Boston in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +5°C | +3°C | +4°C | ||||
| Min. temperature | ||||||
| -20°C | -24°C | -23°C | ||||
| Max. temperature | ||||||
| +22°C | +22°C | +22°C | ||||
| Rainfall | ||||||
| 84 mm | 62 mm | 54 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +8°C | +5°C | +4°C | ||||
| Humidity | ||||||
| 65% | 64% | 62% | ||||
| Air pressure | ||||||
| 1016 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 4 | 5 | 5 | ||||
| Cloudy days | ||||||
| 12 | 11 | 10 | ||||
| Rainy days | ||||||
| 9 | 6 | 5 | ||||
| Snowy days | ||||||
| 6 | 9 | 8 | ||||
January weather is still as ok as in December. It’s getting colder in January. From +5°C in the day, the average maximum temperature lowers to +3°C. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 84 mm to 62 mm. It feels drier, as humidity decreases from 65% to 64%. The average wind speed doesn’t change much during January, staying around 4 m/s. The good news is there are likely to be more sunny days in January, from 4 to 5.
February brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Boston is gradually decreasing during January, going from 5 m/s to 4 m/s over the course of the month.
Rain
Snow
January is one of the snowiest months in Boston.
Here’s how January is compared with other months in the amount of snow, total mm:
How was the weather last January in Boston?
Climate Change over Years
The climate in Boston in January has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+14°C) and the highest in 2022 (+17°C). The driest year was 2016 with only 702 mm of rainfall, and the wettest year was 2021 with 2022 mm.
FAQ
Is January a good time to visit Boston?
Can you sunbathe in Boston in January?
Can you swim in Boston in January?
Is Boston rainy in January?
Is it sunny in Boston in January?
Other cities in USA
Monthly weather in Boston
Source of the data
For this page, we’ve looked at the typical weather in Boston, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.