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July Weather in Petersburg, United States

Last updated: June 24, 2025

In July, the average temperature in Petersburg, United States is a delightful 25°C (78°F). Expect a range where it can dip to a minimum of 15°C (60°F) and soar to a maximum of 35°C (95°F). During this month, you'll experience 113 mm (4.5 in) of precipitation spread over approximately 12 days, contributing to an average humidity of 81%.

July Temperature in Petersburg

In July in Petersburg, the average temperature is 25°C (78°F). Maximums can reach 35°C (95°F) and minimums can be as low as 15°C (60°F). This pleasant climate makes Petersburg an ideal destination for travelers seeking mild weather and 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 25°C (78°F), with highs reaching up to 35°C (95°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec333745546673777570594439
Data source: Temperature data for Petersburg generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in Petersburg

In Petersburg in July, the precipitation amount is 113 mm (4.5 in) over the course of 12 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 113 mm (4.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec8011013512512614611395879893109
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Petersburg

In Petersburg in July humidity is 81%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities less comfortable and requiring frequent breaks to stay hydrated.

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 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
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.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)80 mm (3.1 inches)88%moderate
February Weather3°C (38°F)110 mm (4.3 inches)88%moderate
March Weather7°C (46°F)135 mm (5.3 inches)87%high
April Weather12°C (55°F)125 mm (4.9 inches)85%very high
May Weather19°C (66°F)126 mm (4.9 inches)81%very high
June Weather23°C (74°F)146 mm (5.7 inches)82%very high
July Weather25°C (78°F)113 mm (4.5 inches)81%very high
August Weather24°C (75°F)95 mm (3.7 inches)73%very high
September Weather21°C (71°F)87 mm (3.4 inches)73%very high
October Weather15°C (59°F)98 mm (3.9 inches)78%high
November Weather7°C (44°F)93 mm (3.7 inches)89%moderate
December Weather4°C (39°F)109 mm (4.3 inches)87%moderate

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