January weather - Winter 2025

Weather in January
Frequently asked questions
Average temperature in January
Average pressure in January
Average wind speed in January
Average humidity in January
Average rainfall in January
Average rainfall days in January
Average snowfall in January
Average snowfall days in January
Average daylight in January
Average sunshine in January
Average sunshine days in January
Average UV index in January
Average cloud cover in January
Average visibility in January

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

January, marked by an average high-temperature of 33.8°F (1°C) and a low-temperature of 22.5°F (-5.3°C), is the coldest month.

Humidity

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

Rainfall

In Cambridge, in January, it is raining for 4.3 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, there are 81.8 rainfall days, and 5.51" (140mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Cambridge are January through May, November and December. In Cambridge, during January, snow falls for 4.8 days and regularly aggregates up to 0.35" (9mm) of snow. In Cambridge, during the entire year, snow falls for 16.8 days and aggregates up to 2.4" (61mm) of snow.

Daylight

In January, the average length of the day 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

In Cambridge, the average sunshine in January is 5.2h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In January, the maximum UV index of 2 translates into these guidelines:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

Cambridge records the coldest temperatures in January, averaging a high of 33.8°F (1°C) and a low of 22.5°F (-5.3°C).

How cold is it in January?

The high-temperature during January is 33.8°F (1°C) and the low-temperature is 22.5°F (-5.3°C).

What are the most humid months?

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

What is the average humidity in January?

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

How many days does it rain in January?

In Cambridge, in January, it is raining for 4.3 days, with typically 0.39" (10mm) of accumulated precipitation.

How many days does it snow in January?

In Cambridge, during January, snow falls for 4.8 days and regularly aggregates up to 0.35" (9mm) of snow.

What is the average length of the day in January in Cambridge?

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

What time are sunrise and sunset in January?

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.

How many hours of sunshine does Cambridge have in January?

In Cambridge, Massachusetts, the average sunshine duration in January is 5.2h.

What are the months with the lowest UV index?

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

How high is the UV index in January?

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

39.6°F 4.2°C

33.8°F 1°C

36.5°F 2.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.6mph 15.4km/h

10.1mph 16.3km/h

9.9mph 15.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

23.5

21.4

Average UV index

Average cloud cover

Average visibility

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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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).

January weather forecast
Cambridge, MA

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