July Weather in Heidelberg, United States

Last updated: June 24, 2025

In Heidelberg, United States, the average temperature in July is a warm 27°C (81°F). The temperature can vary, with a minimum of 19°C (66°F) and a maximum reaching 37°C (99°F). During this month, residents can expect approximately 137 mm (5.4 in) of rainfall spread over 17 days, resulting in an average humidity level of 79%.

July Temperature in Heidelberg

In July in Heidelberg, the average temperature is 27°C (81°F). Maximums can reach 37°C (99°F), and minimums can be as low as 19°C (66°F). This makes it an ideal month for travelers who enjoy warm weather and outdoor activities.

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

The chart illustrates July temperature patterns in Heidelberg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heidelberg, July typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 19°C (66°F).

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

July Precipitation in Heidelberg

In Heidelberg in July, the total precipitation amount is 137 mm (5.4 in), occurring over a span of 17 days.

July Precipitation Trends in Heidelberg

The chart displays monthly precipitation patterns in Heidelberg, 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 Heidelberg, July typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 17 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 Heidelberg

In Heidelberg in July, humidity is 79%. With an average temperature of 27°C (81°F), this humidity feels like a warm and sticky embrace, making travel both challenging and invigorating as the air clings to your skin, urging you to seek shade or a refreshing drink.

July Average Humidity in Heidelberg

This chart illustrates the average monthly humidity levels in Heidelberg, 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 Heidelberg is approximately 79%, 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 Heidelberg

In Heidelberg in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Heidelberg.

Maximum UV Index Levels in Heidelberg for July

The chart shows the monthly maximum UV Index (UVI) for Heidelberg 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 Heidelberg typically reaches 11, which falls under the extreme exposure category.

Data source: Heidelberg 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 Heidelberg Compares to Other Months

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

This table compares monthly weather conditions in Heidelberg, 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 (50°F)	110 mm (4.3 inches)	82%	moderate
February Weather	13°C (55°F)	140 mm (5.5 inches)	80%	high
March Weather	16°C (61°F)	121 mm (4.7 inches)	80%	very high
April Weather	18°C (65°F)	127 mm (5.0 inches)	78%	extreme
May Weather	23°C (74°F)	137 mm (5.4 inches)	73%	extreme
June Weather	26°C (79°F)	168 mm (6.6 inches)	71%	extreme
July Weather	27°C (81°F)	137 mm (5.4 inches)	79%	extreme
August Weather	27°C (81°F)	132 mm (5.2 inches)	78%	extreme
September Weather	26°C (78°F)	97 mm (3.8 inches)	80%	very high
October Weather	21°C (70°F)	99 mm (3.9 inches)	76%	very high
November Weather	13°C (56°F)	72 mm (2.8 inches)	83%	high
December Weather	11°C (53°F)	133 mm (5.3 inches)	87%	moderate