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

A small league field in Brookline, Massachusetts, overlooking bright yellow trees in the fall, behind the cityscape of Boston

Weather in January

Brookline, Massachusetts greets the new year with cold, often snowy conditions. The stretch from December to January exhibits an increment in the average lowest temperature, transitioning to 22.5°F (-5.3°C) from a chilling 29.3°F (-1.5°C) in December. The potential for snowfall stays a constant, making a Winter Wonderland a relatively common sight, especially with visibility maintained consistently at 6 miles. Despite the shorter days of 9.5 daylight hours, the town manages to bask in 5.2 hours of sunshine. A robust winter jacket becomes a necessity during this month, given the biting cold and bouts of snowfall.

Temperature

During the coldest month, January, temperatures average a high 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 Brookline, 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

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

Daylight

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

Sunshine

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 threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 2 during January translates into the following directions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.

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

Frequently asked questions

What part of the year is the coldest?

January is the month when Brookline experiences its coldest temperatures, averaging a high of 33.8°F (1°C) and a low of 22.5°F (-5.3°C).

How cold is January?

The average high-temperature and low-temperature during January are 33.8°F (1°C) and 22.5°F (-5.3°C) respectively.

What is the most humid month?

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

What is the average humidity in January?

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

How much does it rain in January?

In Brookline, during January, the rain falls for 4.3 days and regularly aggregates up to 0.39" (10mm) of precipitation.

How much does it snow in January?

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

How many hours of daylight does Brookline have in January?

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

When 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 long on average sun shines in January?

The average sunshine duration in January is 5.2h.

What are the months with the lowest UV index?

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

What is the UV index reading in January?

In January, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.

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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, 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
Brookline, MA

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