July Weather in Charlestown, United States

Last updated: June 24, 2025

In July, the average temperature in Charlestown, United States typically hovers around 27°C (80°F). Expect a range that varies from a comfortable minimum of 18°C (64°F) to a sweltering maximum of 36°C (97°F). This month also brings about 129 mm (5.1 in) of precipitation, spread across 12 days, resulting in an average humidity level of 74%, making it a time to be prepared for moisture in the air!

July Temperature in Charlestown

In July in Charlestown, the average temperature is 27°C (80°F). Maximums can reach 36°C (97°F) and minimums can be as low as 18°C (64°F). It's an ideal time to visit for warm-weather activities while still enjoying cooler evenings.

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

The chart illustrates July temperature patterns in Charlestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Charlestown, July typically has an average temperature of 27°C (80°F), with highs reaching up to 36°C (97°F) and lows dropping to around 18°C (64°F).

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

July Precipitation in Charlestown

In Charlestown in July, the total precipitation amount is 129 mm (5.1 in) over the course of 12 days.

July Precipitation Trends in Charlestown

The chart displays monthly precipitation patterns in Charlestown, 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 Charlestown, July typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Charlestown

In Charlestown in July, humidity is 74%. With an average temperature of 27°C (80°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.

July Average Humidity in Charlestown

This chart illustrates the average monthly humidity levels in Charlestown, 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 Charlestown is approximately 74%, 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 Charlestown

In Charlestown in July, 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 Charlestown.

Maximum UV Index Levels in Charlestown for July

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

Data source: Charlestown 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 Charlestown Compares to Other Months

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

This table compares monthly weather conditions in Charlestown, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	60 mm (2.4 inches)	84%	moderate
February Weather	4°C (40°F)	97 mm (3.8 inches)	83%	moderate
March Weather	7°C (45°F)	97 mm (3.8 inches)	83%	high
April Weather	13°C (56°F)	100 mm (3.9 inches)	81%	very high
May Weather	18°C (65°F)	134 mm (5.3 inches)	78%	very high
June Weather	24°C (75°F)	96 mm (3.8 inches)	79%	very high
July Weather	27°C (80°F)	129 mm (5.1 inches)	74%	very high
August Weather	25°C (78°F)	133 mm (5.2 inches)	72%	very high
September Weather	22°C (72°F)	94 mm (3.7 inches)	75%	very high
October Weather	17°C (62°F)	104 mm (4.1 inches)	81%	high
November Weather	9°C (48°F)	81 mm (3.2 inches)	85%	moderate
December Weather	5°C (41°F)	98 mm (3.9 inches)	84%	moderate