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August Weather in Petersburg, United States

Last updated: June 24, 2025

In Petersburg, United States, the average temperature in August hovers around 27°C (80°F), making it a warm getaway. However, be prepared for temperature fluctuations, with a minimum of 14°C (57°F) and a maximum soaring up to 41°C (106°F). Expect some rain as well, with precipitation reaching around 35 mm (1.4 in) over 7 days, and humidity levels averaging at 71%, adding to the tropical feel of the region.

August Temperature in Petersburg

In August in Petersburg, the average temperature is 27°C (80°F), with maximums reaching up to 41°C (106°F) and minimums dropping as low as 14°C (57°F). It's advisable to pack light clothing for the daytime heat while also including layers for 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 27°C (80°F), with highs reaching up to 41°C (106°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec404354607078818073615044
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 35 mm (1.4 in) over the course of 7 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 35 mm (1.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec181348366855303558461619
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 71%. With an average temperature of 27°C (80°F), this humidity feels like a warm, thick blanket enveloping you, making outdoor activities more challenging and requiring frequent breaks to stay hydrated.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%74%66%70%75%79%78%71%69%70%82%82%
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 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. 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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121210864
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 Weather5°C (41°F)18 mm (0.7 inches)75%moderate
February Weather6°C (43°F)13 mm (0.5 inches)74%high
March Weather12°C (54°F)48 mm (1.9 inches)66%very high
April Weather16°C (60°F)36 mm (1.4 inches)70%extreme
May Weather21°C (71°F)68 mm (2.7 inches)75%extreme
June Weather26°C (78°F)55 mm (2.2 inches)79%extreme
July Weather27°C (81°F)30 mm (1.2 inches)78%extreme
August Weather27°C (80°F)35 mm (1.4 inches)71%extreme
September Weather23°C (74°F)57 mm (2.3 inches)69%very high
October Weather16°C (61°F)46 mm (1.8 inches)70%very high
November Weather10°C (51°F)16 mm (0.6 inches)82%high
December Weather7°C (44°F)19 mm (0.7 inches)82%moderate

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