April Weather in Watertown, United States

Last updated: June 24, 2025

In April, the average temperature in Watertown, United States hovers around 6°C (43°F). During this time, temperatures can swing dramatically, with a minimum of -14°C (7°F) and a maximum of 28°C (83°F). Expect 83 mm (3.3 in) of precipitation over approximately 9 days, complemented by an average humidity of 84%.

April Temperature in Watertown

In April in Watertown, the average temperature is 6°C (43°F). Maximums can reach 28°C (83°F) and minimums can be as low as -14°C (7°F). Travelers should be prepared for a wide range of temperatures during this month.

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

The chart illustrates April 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, April typically has an average temperature of 6°C (43°F), with highs reaching up to 28°C (83°F) and lows dropping to around -14°C (7°F).

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

April Precipitation in Watertown

In Watertown in April, the precipitation amount is 83 mm (3.3 in) over the course of 9 days.

April Precipitation Trends in Watertown

The chart displays monthly precipitation patterns in Watertown, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Watertown, April typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Watertown

In Watertown in April, humidity is 84%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor excursions uncomfortable and prompting travelers to seek refuge indoors or find warm, sheltered spots to enjoy their surroundings.

April Average Humidity in Watertown

This chart illustrates the average monthly humidity levels in Watertown, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Watertown is approximately 84%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Watertown

In Watertown in April, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Watertown.

Maximum UV Index Levels in Watertown for April

The chart shows the monthly maximum UV Index (UVI) for Watertown in April, 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 April, the maximum UV index in Watertown typically reaches 7, which falls under the high exposure category.

Data source: Watertown April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (16°F)	25 mm (1.0 inches)	87%	low
February Weather	-9°C (17°F)	29 mm (1.2 inches)	90%	moderate
March Weather	0°C (33°F)	54 mm (2.1 inches)	85%	moderate
April Weather	6°C (43°F)	83 mm (3.3 inches)	84%	high
May Weather	15°C (59°F)	112 mm (4.4 inches)	78%	very high
June Weather	22°C (72°F)	83 mm (3.3 inches)	80%	very high
July Weather	24°C (75°F)	96 mm (3.8 inches)	81%	very high
August Weather	21°C (71°F)	152 mm (6.0 inches)	81%	very high
September Weather	18°C (64°F)	113 mm (4.4 inches)	81%	high
October Weather	9°C (48°F)	98 mm (3.8 inches)	84%	moderate
November Weather	1°C (33°F)	32 mm (1.3 inches)	88%	moderate
December Weather	-5°C (23°F)	44 mm (1.7 inches)	84%	low