July Weather in Herculaneum, United States

Last updated: June 24, 2025

The average temperature in Herculaneum, United States during July is a warm 26°C (80°F). Temperatures can fluctuate, with a minimum of 16°C (60°F) and reaching up to a sizzling 39°C (102°F). This month also sees 89 mm (3.5 in) of precipitation spread over about 10 days, resulting in a high average humidity of 81%.

July Temperature in Herculaneum

In July in Herculaneum, the average temperature is 26°C (80°F), with maximums reaching 39°C (102°F) and minimums dropping to as low as 16°C (60°F). It's a perfect time for travelers to enjoy warm weather while also being prepared for cooler evenings.

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

The chart illustrates July temperature patterns in Herculaneum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Herculaneum, July typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 16°C (60°F).

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

July Precipitation in Herculaneum

In Herculaneum in July, the precipitation amount is 89 mm (3.5 in) over a period of 10 days.

July Precipitation Trends in Herculaneum

The chart displays monthly precipitation patterns in Herculaneum, 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 Herculaneum, July typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 10 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 Herculaneum

In Herculaneum in July, humidity is 81%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that clings to the skin, making outdoor activities feel more strenuous and requiring frequent breaks to stay refreshed and hydrated.

July Average Humidity in Herculaneum

This chart illustrates the average monthly humidity levels in Herculaneum, 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 Herculaneum is approximately 81%, 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 Herculaneum

In Herculaneum 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 Herculaneum.

Maximum UV Index Levels in Herculaneum for July

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

Data source: Herculaneum 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 Herculaneum Compares to Other Months

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

This table compares monthly weather conditions in Herculaneum, 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 (34°F)	77 mm (3.0 inches)	82%	moderate
February Weather	2°C (37°F)	84 mm (3.3 inches)	80%	moderate
March Weather	9°C (48°F)	132 mm (5.2 inches)	80%	high
April Weather	13°C (56°F)	137 mm (5.4 inches)	80%	very high
May Weather	19°C (67°F)	143 mm (5.6 inches)	82%	very high
June Weather	24°C (76°F)	88 mm (3.5 inches)	83%	extreme
July Weather	26°C (80°F)	89 mm (3.5 inches)	81%	very high
August Weather	25°C (76°F)	124 mm (4.9 inches)	80%	very high
September Weather	22°C (72°F)	68 mm (2.7 inches)	76%	very high
October Weather	15°C (59°F)	104 mm (4.1 inches)	76%	high
November Weather	7°C (45°F)	71 mm (2.8 inches)	85%	moderate
December Weather	4°C (40°F)	62 mm (2.5 inches)	86%	moderate