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August Weather in Petersburg, United States

Last updated: June 24, 2025

In August, the average temperature in Petersburg, United States reaches a pleasant 23°C (73°F). Expect a temperature range where the minimum dips to 9°C (49°F) and the maximum can soar up to 35°C (95°F). With an average precipitation of 73 mm (2.9 in) over 11 days, it's wise to prepare for occasional showers. Humidity levels sit at a comfortable 78%, making this a noteworthy time to visit!

August Temperature in Petersburg

In August in Petersburg, the average temperature is 23°C (73°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 9°C (49°F). This diverse weather makes it a perfect time for travelers to pack a variety of clothing for both warm days and cooler evenings.

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 23°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec272838486071757367554033
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 73 mm (2.9 in), spread over 11 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 73 mm (2.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec65677789126861057359998254
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 78%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor activities a little challenging but still enjoyable for travelers who appreciate a tropical atmosphere.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec25599101098642
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 Weather-3°C (28°F)65 mm (2.6 inches)88%low
February Weather-2°C (29°F)67 mm (2.6 inches)87%moderate
March Weather3°C (38°F)77 mm (3.0 inches)87%moderate
April Weather9°C (48°F)89 mm (3.5 inches)87%very high
May Weather16°C (60°F)126 mm (5.0 inches)81%very high
June Weather21°C (71°F)86 mm (3.4 inches)82%very high
July Weather24°C (75°F)105 mm (4.1 inches)81%very high
August Weather23°C (73°F)73 mm (2.9 inches)78%very high
September Weather19°C (67°F)59 mm (2.3 inches)78%very high
October Weather13°C (55°F)99 mm (3.9 inches)82%high
November Weather4°C (40°F)82 mm (3.2 inches)89%moderate
December Weather1°C (33°F)54 mm (2.1 inches)86%low

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