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August Weather in Petersburg, United States

Last updated: June 24, 2025

In August, the average temperature in Petersburg, United States hovers around 26°C (79°F), making it a pleasant time to visit. Expect minimum temperatures to drop to 15°C (60°F), while the mercury can rise to a sweltering 35°C (96°F). Rainy days offer a refreshing contrast, with a total precipitation of 115 mm (4.5 in) spread over approximately 14 days. With an average humidity level of 67%, the air carries a comfortable warmth that enhances the charm of your surroundings.

August Temperature in Petersburg

In August in Petersburg, the average temperature is 26°C (79°F), with maximums reaching 35°C (96°F) and minimums dipping to as low as 15°C (60°F). This mild climate makes Petersburg an ideal destination for travelers seeking pleasant weather and enjoyable outdoor activities.

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

The chart illustrates August 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, August typically has an average temperature of 26°C (79°F), with highs reaching up to 35°C (96°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec424754607077807874644946
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.

August Precipitation in Petersburg

In Petersburg in August, the precipitation amount is 115 mm (4.5 in) over the course of 14 days.

August Precipitation Trends in Petersburg

The chart displays monthly precipitation patterns in Petersburg, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Petersburg, August typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec11418218515211013414211510911471144
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Petersburg

In Petersburg in August, humidity is 67%. With an average temperature of 26°C (79°F), this humidity feels like a warm embrace, making outdoor activities somewhat sticky but manageable; it's best to plan sightseeing for the cooler mornings or late afternoons to fully enjoy your travels.

August Average Humidity in Petersburg

This chart illustrates the average monthly humidity levels in Petersburg, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Petersburg is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Petersburg

In Petersburg in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Petersburg in August, 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 August, the maximum UV index in Petersburg typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111109753
Data source: Petersburg August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)114 mm (4.5 inches)87%moderate
February Weather8°C (47°F)182 mm (7.2 inches)87%high
March Weather12°C (54°F)185 mm (7.3 inches)85%very high
April Weather16°C (60°F)152 mm (6.0 inches)82%very high
May Weather21°C (71°F)110 mm (4.3 inches)83%very high
June Weather25°C (77°F)134 mm (5.3 inches)82%extreme
July Weather26°C (80°F)142 mm (5.6 inches)78%extreme
August Weather26°C (79°F)115 mm (4.5 inches)67%very high
September Weather23°C (75°F)109 mm (4.3 inches)64%very high
October Weather18°C (64°F)114 mm (4.5 inches)74%high
November Weather10°C (50°F)71 mm (2.8 inches)87%moderate
December Weather8°C (47°F)144 mm (5.7 inches)88%moderate

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