July Weather in Cornwall, United States

Last updated: June 24, 2025

In Cornwall, United States, the average temperature in July hovers around 24°C (75°F), with fluctuations between a cool 13°C (56°F) and a scorching 36°C (97°F). Visitors can expect 129 mm (5.1 in) of precipitation spread over 13 days, contributing to an average humidity level of 62%, which enhances the region's rich atmosphere.

July Temperature in Cornwall

In July in Cornwall, the average temperature is 24°C (75°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 13°C (56°F). It's a great time to explore Cornwall, so pack accordingly to enjoy both warm days and cooler evenings.

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

The chart illustrates July temperature patterns in Cornwall, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cornwall, July typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 13°C (56°F).

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

July Precipitation in Cornwall

In Cornwall in July, the precipitation amount is 129 mm (5.1 in) over the course of 13 days.

July Precipitation Trends in Cornwall

The chart displays monthly precipitation patterns in Cornwall, 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 Cornwall, July typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 13 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 Cornwall

In Cornwall in July, humidity is 62%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making for a sticky yet comfortable travel experience that invites you to explore but may require occasional breaks to rehydrate and cool down.

July Average Humidity in Cornwall

This chart illustrates the average monthly humidity levels in Cornwall, 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 Cornwall is approximately 62%, 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 Cornwall

In Cornwall 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 Cornwall.

Maximum UV Index Levels in Cornwall for July

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

Data source: Cornwall 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 Cornwall Compares to Other Months

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

This table compares monthly weather conditions in Cornwall, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	69 mm (2.7 inches)	84%	moderate
February Weather	1°C (33°F)	95 mm (3.7 inches)	82%	moderate
March Weather	4°C (39°F)	88 mm (3.5 inches)	81%	high
April Weather	10°C (50°F)	118 mm (4.6 inches)	78%	very high
May Weather	15°C (60°F)	119 mm (4.7 inches)	69%	very high
June Weather	20°C (69°F)	95 mm (3.7 inches)	69%	very high
July Weather	24°C (75°F)	129 mm (5.1 inches)	62%	very high
August Weather	23°C (73°F)	121 mm (4.8 inches)	65%	very high
September Weather	19°C (67°F)	115 mm (4.5 inches)	68%	very high
October Weather	14°C (57°F)	141 mm (5.5 inches)	74%	high
November Weather	6°C (42°F)	90 mm (3.5 inches)	82%	moderate
December Weather	1°C (35°F)	102 mm (4.0 inches)	80%	low