July Weather in Petersburg, United States

Last updated: June 24, 2025

In July, the average temperature in Petersburg, United States hovers around 15°C (59°F). You can expect temperatures to range from a cool 9°C (49°F) to a warm 27°C (81°F). This month also brings about 195 mm (7.7 in) of precipitation over 18 days, while the humidity levels are notably high at 110%. Prepare accordingly for a mix of conditions!

July Temperature in Petersburg

In July, in Petersburg, the average temperature is 15°C (59°F). The maximum can reach 27°C (81°F), while the minimum can drop to as low as 9°C (49°F). This makes Petersburg an ideal destination for travelers seeking pleasant weather coupled with the opportunity for outdoor activities.

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 15°C (59°F), with highs reaching up to 27°C (81°F) and lows dropping to around 9°C (49°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 precipitation amount reaches 195 mm (7.7 in) over a span of 18 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 195 mm (7.7 inches) of precipitation spread over approximately 18 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 110%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket enveloping you, making each step feel like a slog and leaving you drenched in sweat, which can make traveling quite uncomfortable.

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 110%, 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 is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. 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 7, which falls under the 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 (30°F)	225 mm (8.9 inches)	88%	low
February Weather	-2°C (29°F)	176 mm (6.9 inches)	84%	low
March Weather	1°C (35°F)	177 mm (7.0 inches)	86%	moderate
April Weather	5°C (42°F)	190 mm (7.5 inches)	88%	moderate
May Weather	10°C (50°F)	160 mm (6.3 inches)	88%	high
June Weather	13°C (55°F)	206 mm (8.1 inches)	96%	high
July Weather	15°C (59°F)	195 mm (7.7 inches)	110%	high
August Weather	15°C (59°F)	297 mm (11.7 inches)	111%	high
September Weather	12°C (54°F)	288 mm (11.3 inches)	104%	moderate
October Weather	6°C (44°F)	276 mm (10.9 inches)	96%	moderate
November Weather	3°C (38°F)	309 mm (12.2 inches)	92%	low
December Weather	0°C (33°F)	258 mm (10.2 inches)	91%	low