July Weather in Groton, United States

Last updated: June 24, 2025

In July, the average temperature in Groton, United States hovers around 24°C (75°F), with a minimum dip to 10°C (50°F) and a peak reaching 37°C (98°F). Expect 76 mm (3.0 in) of precipitation spread over 9 days, and prepare for high humidity levels averaging 82%. Whether you're looking to enjoy the warmth or brace for some rain, this month offers a dynamic climate!

July Temperature in Groton

In July in Groton, the average temperature is 24°C (75°F). Maximum temperatures can reach 37°C (98°F), while minimums can drop to as low as 10°C (50°F). Be sure to pack both lightweight clothing for the heat and a warmer layer for cool evenings while traveling.

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

The chart illustrates July 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, July typically has an average temperature of 24°C (75°F), with highs reaching up to 37°C (98°F) and lows dropping to around 10°C (50°F).

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

July Precipitation in Groton

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

July Precipitation Trends in Groton

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

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Groton

In Groton in July, humidity is 82%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making travel feel sticky and heavy on the skin, often requiring more frequent breaks and hydration.

July Average Humidity in Groton

This chart illustrates the average monthly humidity levels in Groton, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Groton is approximately 82%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Groton

In Groton in July, 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 Groton.

Maximum UV Index Levels in Groton for July

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

Data source: Groton July 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 July 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 July’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 July’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