January Weather in Brookhaven, United States

Last updated: June 24, 2025

In January, the average temperature in Brookhaven, United States hovers around 0°C (33°F). Temperatures can vary significantly, with a minimum of -23°C (-9°F) and a maximum reaching 21°C (71°F). Expect 93 mm (3.7 in) of precipitation spread over 13 days, and be prepared for the high average humidity of 88%, making the air feel cool and crisp.

January Temperature in Brookhaven

In January in Brookhaven, the average temperature is 0°C (33°F), with maximums reaching 21°C (71°F) and minimums dropping as low as -23°C (-9°F). Make sure to pack a range of clothing to enjoy your trip comfortably!

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

The chart illustrates January temperature patterns in Brookhaven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brookhaven, January typically has an average temperature of 0°C (33°F), with highs reaching up to 21°C (71°F) and lows dropping to around -23°C (-9°F).

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

January Precipitation in Brookhaven

In Brookhaven in January, the total precipitation amount is 93 mm (3.7 in), which falls over the course of 13 days.

January Precipitation Trends in Brookhaven

The chart displays monthly precipitation patterns in Brookhaven, 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 Brookhaven, January typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 13 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 Brookhaven

In Brookhaven in January, humidity is 88%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring extra layers to stay warm and dry.

January Average Humidity in Brookhaven

This chart illustrates the average monthly humidity levels in Brookhaven, 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 Brookhaven is approximately 88%, 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 Brookhaven

In Brookhaven 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 Brookhaven, you can check the information here.

Maximum UV Index Levels in Brookhaven for January

The chart shows the monthly maximum UV Index (UVI) for Brookhaven 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 Brookhaven typically reaches 3, which falls under the moderate exposure category.

Data source: Brookhaven 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 Brookhaven Compares to Other Months

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

This table compares monthly weather conditions in Brookhaven, 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 (33°F)	93 mm (3.7 inches)	88%	moderate
February Weather	3°C (38°F)	150 mm (5.9 inches)	88%	moderate
March Weather	6°C (44°F)	118 mm (4.7 inches)	88%	high
April Weather	11°C (53°F)	145 mm (5.7 inches)	86%	very high
May Weather	17°C (63°F)	156 mm (6.1 inches)	82%	very high
June Weather	21°C (70°F)	161 mm (6.3 inches)	84%	very high
July Weather	23°C (74°F)	130 mm (5.1 inches)	82%	very high
August Weather	22°C (72°F)	117 mm (4.6 inches)	73%	very high
September Weather	20°C (68°F)	114 mm (4.5 inches)	73%	very high
October Weather	14°C (58°F)	117 mm (4.6 inches)	81%	high
November Weather	6°C (43°F)	90 mm (3.5 inches)	89%	moderate
December Weather	3°C (38°F)	130 mm (5.1 inches)	86%	moderate