March Weather in Watertown, United States

Last updated: June 24, 2025

In March, the average temperature in Watertown, United States is a comfortable 18°C (65°F). However, be prepared for a wide range, as temperatures can dip to a chilly -2°C (29°F) or soar up to a sizzling 34°C (94°F). Expect about 36 mm (1.4 in) of precipitation spread over 6 days, and keep in mind that the average humidity sits at a high 80%, adding a touch of mugginess to the air.

March Temperature in Watertown

In March in Watertown, the average temperature is 18°C (65°F), with maximums reaching 34°C (94°F) and minimums dropping as low as -2°C (29°F). This variety in temperatures makes it essential to pack layers to stay comfortable while exploring.

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

The chart illustrates March 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, March typically has an average temperature of 18°C (65°F), with highs reaching up to 34°C (94°F) and lows dropping to around -2°C (29°F).

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

March Precipitation in Watertown

In Watertown in March, the total precipitation amount is 36 mm (1.4 in), which falls over the course of 6 days.

March Precipitation Trends in Watertown

The chart displays monthly precipitation patterns in Watertown, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Watertown, March typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 6 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Watertown

In Watertown in March, humidity is 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

March Average Humidity in Watertown

This chart illustrates the average monthly humidity levels in Watertown, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Watertown is approximately 80%, offering insight into how humid the weather typically is during this month.

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

March UV Index in Watertown

In Watertown in March, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Watertown.

Maximum UV Index Levels in Watertown for March

The chart shows the monthly maximum UV Index (UVI) for Watertown in March, 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 March, the maximum UV index in Watertown typically reaches 9, which falls under the very high exposure category.

Data source: Watertown March 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 March 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 March’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 March’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