January Weather in Watertown, United States

Last updated: June 24, 2025

In Watertown, United States, the average temperature in January hovers around 13°C (55°F). Expect a minimum of -5°C (23°F) and a potential maximum of 28°C (83°F). The month sees 54 mm (2.1 in) of precipitation over about 6 days, accompanied by a notable average humidity of 85%. Perfect for a cozy day indoors or a refreshing outing!

January Temperature in Watertown

In January in Watertown, the average temperature is 13°C (55°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop as low as -5°C (23°F). This makes Watertown a destination that offers a diverse range of weather conditions, perfect for travelers seeking both warmth and a touch of winter chill.

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

The chart illustrates January temperature patterns in Watertown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Watertown, January typically has an average temperature of 13°C (55°F), with highs reaching up to 28°C (83°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Watertown

In Watertown in January, the total precipitation amount is 54 mm (2.1 in) over the course of 6 days.

January Precipitation Trends in Watertown

The chart displays monthly precipitation patterns in Watertown, 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 Watertown, January typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 6 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 Watertown

In Watertown in January, humidity is 85%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making even short walks feel exhausting and urging travelers to seek shade and refreshment frequently.

January Average Humidity in Watertown

This chart illustrates the average monthly humidity levels in Watertown, 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 Watertown is approximately 85%, 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 Watertown

In Watertown in January, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Watertown.

Maximum UV Index Levels in Watertown for January

The chart shows the monthly maximum UV Index (UVI) for Watertown 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 Watertown typically reaches 5, which falls under the moderate exposure category.

Data source: Watertown 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 Watertown Compares to Other Months

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

This table compares monthly weather conditions in Watertown, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	54 mm (2.1 inches)	85%	moderate
February Weather	16°C (61°F)	73 mm (2.9 inches)	82%	high
March Weather	18°C (65°F)	36 mm (1.4 inches)	80%	very high
April Weather	21°C (70°F)	75 mm (3.0 inches)	76%	very high
May Weather	24°C (76°F)	76 mm (3.0 inches)	73%	extreme
June Weather	26°C (80°F)	158 mm (6.2 inches)	74%	extreme
July Weather	27°C (81°F)	175 mm (6.9 inches)	80%	extreme
August Weather	27°C (81°F)	184 mm (7.2 inches)	79%	extreme
September Weather	26°C (80°F)	140 mm (5.5 inches)	83%	very high
October Weather	23°C (74°F)	65 mm (2.6 inches)	77%	very high
November Weather	17°C (62°F)	64 mm (2.5 inches)	84%	high
December Weather	14°C (58°F)	103 mm (4.1 inches)	88%	moderate