June Weather in Groton, United States

Last updated: June 24, 2025

In June, the average temperature in Groton, United States is a pleasant 22°C (71°F). Expect a range from a cool 6°C (43°F) at night to a sweltering 38°C (101°F) during the day. With about 65 mm (2.6 in) of precipitation over 8 days, you'll want to keep an eye on the weather. Humidity is relatively high at 81%, adding to the tropical feel of the season.

June Temperature in Groton

In June in Groton, the average temperature is 22°C (71°F). Maximum temperatures can reach 38°C (101°F), while the minimum can drop as low as 6°C (43°F). It's a perfect time for travelers to enjoy a mix of warm days and cooler evenings in Groton.

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

The chart illustrates June 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, June typically has an average temperature of 22°C (71°F), with highs reaching up to 38°C (101°F) and lows dropping to around 6°C (43°F).

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

June Precipitation in Groton

In Groton in June, the total precipitation amount is 65 mm (2.6 in) spread over the course of 8 days.

June Precipitation Trends in Groton

The chart displays monthly precipitation patterns in Groton, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Groton, June typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

June Humidity in Groton

In Groton in June humidity is 81%. With an average temperature of 22°C (71°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities somewhat challenging but offering a tropical ambiance perfect for exploring shaded areas and enjoying refreshing drinks.

June Average Humidity in Groton

This chart illustrates the average monthly humidity levels in Groton, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Groton is approximately 81%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Groton

In Groton in June, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Groton.

Maximum UV Index Levels in Groton for June

The chart shows the monthly maximum UV Index (UVI) for Groton in June, 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 June, the maximum UV index in Groton typically reaches 10, which falls under the very high exposure category.

Data source: Groton June 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 June 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 June’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 June’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