July Weather in Petersburg, United States

Last updated: June 24, 2025

In July, the average temperature in Petersburg, United States hovers around a warm 26°C (80°F), with a minimum of 15°C (59°F) and a maximum reaching 37°C (99°F). Visitors can expect about 77 mm (3.0 in) of precipitation spread over 10 days, paired with an average humidity of 79%, creating a tropical vibe that’s both inviting and invigorating.

July Temperature in Petersburg

In July in Petersburg, the average temperature is 26°C (80°F). Maximums can reach 37°C (99°F) and minimums can be as low as 15°C (59°F). This pleasant weather makes it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates July temperature patterns in Petersburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Petersburg, July typically has an average temperature of 26°C (80°F), with highs reaching up to 37°C (99°F) and lows dropping to around 15°C (59°F).

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

July Precipitation in Petersburg

In Petersburg in July, the total precipitation amount is 77 mm (3.0 in) spread over a duration of 10 days.

July Precipitation Trends in Petersburg

The chart displays monthly precipitation patterns in Petersburg, 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 Petersburg, July typically receives around 77 mm (3.0 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 Petersburg

In Petersburg in July, humidity is 79%. With an average temperature of 26°C (80°F), this humidity feels like an enveloping warm blanket, making travel feel slightly sluggish and prompting frequent hydration breaks to stay comfortable while exploring the sights.

July Average Humidity in Petersburg

This chart illustrates the average monthly humidity levels in Petersburg, 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 Petersburg 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 Petersburg

In Petersburg 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 Petersburg.

Maximum UV Index Levels in Petersburg for July

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

Data source: Petersburg 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 Petersburg Compares to Other Months

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

This table compares monthly weather conditions in Petersburg, 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)	91 mm (3.6 inches)	87%	moderate
February Weather	3°C (38°F)	117 mm (4.6 inches)	85%	moderate
March Weather	8°C (48°F)	147 mm (5.8 inches)	86%	high
April Weather	13°C (56°F)	124 mm (4.9 inches)	84%	very high
May Weather	20°C (68°F)	137 mm (5.4 inches)	79%	very high
June Weather	25°C (76°F)	125 mm (4.9 inches)	82%	extreme
July Weather	26°C (80°F)	77 mm (3.0 inches)	79%	very high
August Weather	25°C (77°F)	89 mm (3.5 inches)	70%	very high
September Weather	22°C (73°F)	77 mm (3.0 inches)	69%	very high
October Weather	16°C (61°F)	105 mm (4.1 inches)	76%	high
November Weather	7°C (45°F)	98 mm (3.8 inches)	88%	moderate
December Weather	4°C (40°F)	104 mm (4.1 inches)	87%	moderate