Boston
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast
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January weather forecast and Climate
Boston, MA

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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.
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  • The average high temperature in January: 2.1°C

The warmest month (with the highest average high temperature) is July (27.4°C).
The month with the lowest average high temperature is January (2.1°C).

  • The average low temperature in January: -5.4°C

The month with the highest average low temperature is July (18.6°C).
The coldest month (with the lowest average low temperature) is January (-5.4°C).

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  • The 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%).

  • The average rainfall in January: 85.3mm

The wettest month (with the highest rainfall) is March (109.7mm).
The driest month (with the lowest rainfall) is February (82.6mm).

  • The 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).

  • The average snowfall in January: 327.7mm

The month with the highest snowfall is January (327.7mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

  • The 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).

  • The average sea temperature in January: 5.2°C

The best month for swimming (with the highest average sea temperature) is August (20°C).
The coldest month (with the lowest average sea temperature) is February (3.4°C).

  • The average daylight in January: 9h

Months with the longest days are May, June and July (Average daylight: 15h).
Months with shortest days are January and December (Average daylight: 9h).

  • The 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).

  • The 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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