Boston
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Boston, MA

A beautiful natural park with the George Washington Monument in Boston, Massachusetts, with a sneak view of the city skyscrapers
A beautiful natural park with the George Washington Monument in Boston, Massachusetts, with a sneak view of the city skyscrapers
January is the coldest month in Boston, with the temperature in the low range from 22.3°F (-5.4°C) to 35.8°F (2.1°C). Winter is at its peak, and blizzards are frequent, as are snowstorms. The nights are freezing, and occasionally, the temperature drops lower than 19.4°F (-7°C).
January receives the highest snowfall of the year accumulating to 12.9" (327.7mm), from an average of seven snowfall days. There is fairly minimal rainfall in January, falling for approximately eleven days to collect a mildly low 3.4" (86.4mm) in precipitation.
  • Average high temperature in January: 35.8°F

The warmest month (with the highest average high temperature) is July (81.4°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in January: 22.2°F

The month with the highest average low temperature is July (65.4°F).
The coldest month (with the lowest average low temperature) is January (22.2°F).

  • Average humidity in January: 62.3%

The month with the highest relative humidity is September (71.8%).
The month with the lowest relative humidity is February (62%).

  • Average rainfall in January: 3.4"

The wettest month (with the highest rainfall) is March (4.3").
The driest month (with the lowest rainfall) is February (3.3").

  • Average rainfall days in January: 11.3 days

The month with the highest number of rainy days is May (12 days).
The month with the lowest number of rainy days is September (8.6 days).

  • Average snowfall in January: 12.9"

The month with the highest snowfall is January (12.9").
Months with the lowest snowfall are May, June, July, August, September and October (0").

  • Average snowfall days in January: 6.7 days

The month with the highest number of snowfall days is January (6.7 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

  • Average sea temperature in January: 41.3°F

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).

  • Average daylight in January: 9.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in January: 5.3h

The month with most sunshine is July (Average sunshine: 9.7h).
The month with least sunshine is December (Average sunshine: 4.6h).

  • Average UV index in January: 1

Months with the highest UV index are June, July and August (UV index 8).
Months with the lowest UV index are January and December (UV index 1).

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