January weather forecast
Cambridge, MA

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The John Weeks Memorial Footbridge in Cambridge, Massachusetts, over the Charles River calm waters, and a distant view of the Havard University student residence unit
The John Weeks Memorial Footbridge in Cambridge, Massachusetts, over the Charles River calm waters, and a distant view of the Havard University student residence unit

Weather in January

January in Cambridge, Massachusetts predominantly delivers snowfall, a common characteristic of weather in this area in winter. With a typical mix of snow-affected and dry days, the climate often alternates from snowy conditions to clear skies. Evocative frozen landscapes often come to mind when considering this month in the Massachusetts region. The peak of winter sees temperatures dipping to as low as 22.5°F (-5.3°C) and reaching no higher than 33.8°F (1°C). The occasional cold snap may make you pause before heading outside, yet the frost and snow enhance the city's scenic vistas.

Temperature

Cambridge, Massachusetts, notes the coldest temperatures in January, with a high average of 33.8°F (1°C) and a low of 22.5°F (-5.3°C).

Humidity

January and February, with an average relative humidity of 77%, are the most humid months.

Rainfall

In January, the rain falls for 4.3 days. Throughout January, 0.39" (10mm) of precipitation is accumulated. In Cambridge, Massachusetts, during the entire year, the rain falls for 81.8 days and collects up to 5.51" (140mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In Cambridge, in January, during 4.8 snowfall days, 0.35" (9mm) of snow is typically accumulated. Throughout the year, there are 16.8 snowfall days, and 2.4" (61mm) of snow is accumulated.

Daylight

The average length of the day in January is 9h and 30min.
On the first day of January, sunrise is at 7:13 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 4:56 pm EST.

Sunshine

The average sunshine in January is 5.2h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A daily high UV index of 2 in January leads to these guidelines:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.

Frequently asked questions

What is the coldest time of year?

Cambridge experiences its average lowest temperatures in January, reaching a peak of 33.8°F (1°C) and a minimum of 22.5°F (-5.3°C).

How cold is January?

An average high-temperature, in January, in Cambridge, is 33.8°F (1°C) and the average low-temperature is 22.5°F (-5.3°C).

What is the most humid month?

The months with the highest humidity are January and February, with an average relative humidity of 77%.

What is the average humidity in January?

In Cambridge, Massachusetts, the average relative humidity in January is 77%.

How many days does it rain in January?

In January, in Cambridge, the rain falls for 4.3 days. Throughout January, 0.39" (10mm) of precipitation is accumulated.

How many days does it snow in January?

In Cambridge, in January, snow falls for 4.8 days, with typically accumulated 0.35" (9mm) of snow.

What is the average length of the day in January?

In January, the average day length is 9h and 30min.

When is the sunrise / sunset in January?

In January, on the first day of the month, sunrise is at 7:13 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 4:56 pm EST.

How many hours of sunshine does Cambridge have in January?

The average sunshine duration in January is 5.2h.

What is the month with the lowest UV index?

The months with the lowest UV index in Cambridge are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in January?

In January, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Cambridge, MA

Average temperature in January - Cambridge, MA
  • Average high temperature in January: 33.8°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.8°F).

  • Average low temperature in January: 22.5°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in January
Cambridge, MA

Average pressure in January - Cambridge, MA
  • Average pressure in January: 30.01"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in January
Cambridge, MA

Average wind speed in January - Cambridge, MA
  • Average wind speed in January: 9.5mph

The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).

Average humidity in January
Cambridge, MA

Average humidity in January - Cambridge, MA
  • Average humidity in January: 77%

The months with the highest relative humidity are January and February (77%).
The month with the lowest relative humidity is April (69%).

Average rainfall in January
Cambridge, MA

Average rainfall in January - Cambridge, MA
  • Average rainfall in January: 0.39"

The wettest month (with the highest rainfall) is November (0.63").
The driest month (with the least rainfall) is September (0.2").

Average rainfall days in January
Cambridge, MA

Average rainfall days in January - Cambridge, MA
  • Average rainfall days in January: 4.3 days

The month with the highest number of rainy days is July (9.6 days).
The month with the least rainy days is January (4.3 days).

Average snowfall in January
Cambridge, MA

Average snowfall in January - Cambridge, MA
  • Average snowfall in January: 0.35"

The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in January
Cambridge, MA

Average snowfall days in January - Cambridge, MA
  • Average snowfall days in January: 4.8 days

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in January /
Average sunshine in January
Cambridge, MA

Average daylight in January / Average sunshine in January - Cambridge, MA
  • Average daylight in January: 9h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in January: 5h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in January
Cambridge, MA

Average sunshine days in January - Cambridge, MA
  • Average sunshine days in January: 23.5 days

The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is June (17.4 days).

Average UV index in January
Cambridge, MA

Average UV index in January - Cambridge, MA
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in January
Cambridge, MA

Average cloud cover in January - Cambridge, MA
  • Average cloud cover in January: 45

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in January
Cambridge, MA

Average visibility in January - Cambridge, MA
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Cambridge, Massachusetts, USA

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