January Weather in Brookline, United States

Last updated: June 24, 2025

In January, the average temperature in Brookline, United States hovers around 0°C (32°F), with a potential minimum of -19°C (-3°F) and a peak maximum of 19°C (67°F). Expect around 79 mm (3.1 in) of precipitation over approximately 9 days, contributing to an average humidity of 86%. Stay prepared for chilly and damp conditions!

January Temperature in Brookline

In January in Brookline, the average temperature is 0°C (32°F). The maximum can reach 19°C (67°F), while the minimum can drop as low as -19°C (-3°F). Be sure to pack both warm clothing and lighter layers to accommodate the range of temperatures during your travels.

January Weather in Brookline: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Brookline, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brookline, January typically has an average temperature of 0°C (32°F), with highs reaching up to 19°C (67°F) and lows dropping to around -19°C (-3°F).

Data source: Temperature data for Brookline generated using information from the Copernicus Climate Change Service.

January Precipitation in Brookline

In Brookline in January, the precipitation amount is 79 mm (3.1 in) spread over 9 days.

January Precipitation Trends in Brookline

The chart displays monthly precipitation patterns in Brookline, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Brookline, January typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Brookline

In Brookline in January humidity is 86%. With an average temperature of 0°C (32°F), this humidity feels like a biting chill that seeps into your bones, making travel feel uncomfortable and damp, as the cold air combines with the moisture to create a brisk sensation that may deter outdoor exploration.

January Average Humidity in Brookline

This chart illustrates the average monthly humidity levels in Brookline, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Brookline is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Brookline

In Brookline in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Brookline, you can check the information here.

Maximum UV Index Levels in Brookline for January

The chart shows the monthly maximum UV Index (UVI) for Brookline in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Brookline typically reaches 3, which falls under the moderate exposure category.

Data source: Brookline January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Brookline Compares to Other Months

Weather in Brookline varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Brookline, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Brookline, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	79 mm (3.1 inches)	86%	moderate
February Weather	1°C (34°F)	97 mm (3.8 inches)	84%	moderate
March Weather	3°C (38°F)	102 mm (4.0 inches)	82%	moderate
April Weather	9°C (48°F)	135 mm (5.3 inches)	80%	very high
May Weather	14°C (58°F)	94 mm (3.7 inches)	72%	very high
June Weather	19°C (67°F)	86 mm (3.4 inches)	72%	very high
July Weather	23°C (73°F)	115 mm (4.5 inches)	67%	very high
August Weather	23°C (73°F)	76 mm (3.0 inches)	66%	very high
September Weather	19°C (67°F)	92 mm (3.6 inches)	71%	high
October Weather	14°C (57°F)	149 mm (5.9 inches)	78%	high
November Weather	7°C (44°F)	100 mm (3.9 inches)	84%	moderate
December Weather	2°C (36°F)	124 mm (4.9 inches)	81%	low