May Weather in Watertown, United States

Last updated: June 24, 2025

In May in Watertown, United States, the average temperature hovers around 24°C (76°F), creating a pleasant climate. However, be prepared for fluctuations, as temperatures can dip to a cool 9°C (48°F) and soar to a scorching 39°C (102°F). Rainfall is moderate, with 76 mm (3.0 in) expected over approximately 9 days, while humidity maintains a steady average of 73%. Be ready for a mix of sunny spells and refreshing showers!

May Temperature in Watertown

In May in Watertown, the average temperature is 24°C (76°F). The maximum can reach 39°C (102°F), and the minimum can be as low as 9°C (48°F). Be prepared for a wide range of temperatures when planning your travel to Watertown this May.

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

The chart illustrates May 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, May typically has an average temperature of 24°C (76°F), with highs reaching up to 39°C (102°F) and lows dropping to around 9°C (48°F).

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

May Precipitation in Watertown

In Watertown in May, the precipitation amount is 76 mm (3.0 in) spread over a period of 9 days.

May Precipitation Trends in Watertown

The chart displays monthly precipitation patterns in Watertown, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Watertown, May typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Watertown

In Watertown in May humidity is 73%. With an average temperature of 24°C (76°F), this humidity feels like a warm and sticky embrace, making travel slightly uncomfortable as the air thickens around you, prompting you to seek shade and stay hydrated.

May Average Humidity in Watertown

This chart illustrates the average monthly humidity levels in Watertown, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Watertown is approximately 73%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Watertown

In Watertown in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Watertown.

Maximum UV Index Levels in Watertown for May

The chart shows the monthly maximum UV Index (UVI) for Watertown in May, 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 May, the maximum UV index in Watertown typically reaches 11, which falls under the extreme exposure category.

Data source: Watertown May 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 May 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 May’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 May’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