April Weather in Groton, United States

Last updated: June 24, 2025

In April, the average temperature in Groton, United States hovers around 5°C (41°F). However, temperatures can be quite variable, with a minimum of -20°C (-4°F) and a maximum reaching 27°C (81°F). During this month, expect around 47 mm (1.9 in) of precipitation spread over approximately 8 days, accompanied by an average humidity of 79%.

April Temperature in Groton

In April in Groton, the average temperature is 5°C (41°F). Maximums can reach 27°C (81°F), while minimums can be as low as -20°C (-4°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates April temperature patterns in Groton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Groton, April typically has an average temperature of 5°C (41°F), with highs reaching up to 27°C (81°F) and lows dropping to around -20°C (-4°F).

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

April Precipitation in Groton

In Groton in April, the precipitation amount is 47 mm (1.9 in) over a span of 8 days.

April Precipitation Trends in Groton

The chart displays monthly precipitation patterns in Groton, 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 Groton, April typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Groton

In Groton in April, humidity is 79%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while traveling.

April Average Humidity in Groton

This chart illustrates the average monthly humidity levels in Groton, 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 Groton is approximately 79%, 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 Groton

In Groton 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 Groton.

Maximum UV Index Levels in Groton for April

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

Data source: Groton 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 Groton Compares to Other Months

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

This table compares monthly weather conditions in Groton, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (15°F)	18 mm (0.7 inches)	81%	moderate
February Weather	-10°C (14°F)	16 mm (0.6 inches)	85%	moderate
March Weather	-1°C (31°F)	35 mm (1.4 inches)	76%	moderate
April Weather	5°C (41°F)	47 mm (1.9 inches)	79%	high
May Weather	14°C (57°F)	64 mm (2.5 inches)	76%	very high
June Weather	22°C (71°F)	65 mm (2.6 inches)	81%	very high
July Weather	24°C (75°F)	76 mm (3.0 inches)	82%	very high
August Weather	21°C (71°F)	108 mm (4.2 inches)	82%	very high
September Weather	17°C (63°F)	88 mm (3.5 inches)	77%	high
October Weather	8°C (46°F)	76 mm (3.0 inches)	76%	moderate
November Weather	0°C (33°F)	17 mm (0.7 inches)	84%	moderate
December Weather	-5°C (23°F)	33 mm (1.3 inches)	81%	low