January Weather in Water Mill, United States

Last updated: June 24, 2025

In January, the average temperature in Water Mill, United States hovers around 2°C (37°F), with nightly lows potentially dropping to a brisk -13°C (8°F) and daytime highs reaching a mild 13°C (56°F). Expect about 89 mm (3.5 in) of precipitation spread over 9 days, contributing to an average humidity level of 84%, creating that characteristic chilly yet refreshing atmosphere.

January Temperature in Water Mill

In January in Water Mill, the average temperature is 2°C (37°F). The maximum can reach 13°C (56°F), and the minimum can be as low as -13°C (8°F). Be sure to pack warmly and prepare for a mix of chilly and mild days if you plan to travel during this time.

January Weather in Water Mill: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Water Mill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Water Mill, January typically has an average temperature of 2°C (37°F), with highs reaching up to 13°C (56°F) and lows dropping to around -13°C (8°F).

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

January Precipitation in Water Mill

In Water Mill in January, the precipitation amount is 89 mm (3.5 in) during a span of 9 days.

January Precipitation Trends in Water Mill

The chart displays monthly precipitation patterns in Water Mill, 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 Water Mill, January typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Water Mill

In Water Mill in January, humidity is 84%. With an average temperature of 2°C (37°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and prompting the need for layered clothing to stay warm and dry.

January Average Humidity in Water Mill

This chart illustrates the average monthly humidity levels in Water Mill, 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 Water Mill is approximately 84%, 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 Water Mill

In Water Mill 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 Water Mill, you can check the information here.

Maximum UV Index Levels in Water Mill for January

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

Data source: Water Mill 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 Water Mill Compares to Other Months

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

This table compares monthly weather conditions in Water Mill, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (37°F)	89 mm (3.5 inches)	84%	moderate
February Weather	3°C (37°F)	123 mm (4.8 inches)	84%	moderate
March Weather	4°C (39°F)	113 mm (4.5 inches)	82%	high
April Weather	8°C (47°F)	137 mm (5.4 inches)	79%	very high
May Weather	12°C (54°F)	129 mm (5.1 inches)	75%	very high
June Weather	18°C (64°F)	72 mm (2.9 inches)	78%	very high
July Weather	22°C (72°F)	99 mm (3.9 inches)	76%	very high
August Weather	23°C (73°F)	103 mm (4.0 inches)	76%	very high
September Weather	20°C (69°F)	99 mm (3.9 inches)	75%	very high
October Weather	16°C (61°F)	160 mm (6.3 inches)	75%	high
November Weather	10°C (50°F)	113 mm (4.4 inches)	80%	moderate
December Weather	5°C (42°F)	147 mm (5.8 inches)	80%	low