St. Petersburg Weather in August
In August, St. Petersburg averages a high of 21°C (70°F) and a low of 13°C (56°F), from 54 years of daily records (1971–2025).
21°C
Average high
70°F
13°C
Average low
56°F
37°C
Record high
99°F · August 7, 2010
3°C
Record low
37°F · August 27, 1973
What August Is Like in St. Petersburg
- 6 of the 10 warmest Augusts on record in St. Petersburg have come since 2010.
- August in St. Petersburg has become 1.6°C (2.9°F) warmer on average: the 2010–2024 average against 1970–1989.
- The coldest August reading, 3°C (37°F) on August 27, 1973, has not been matched in 52 years.
- August is the wettest month of the year in St. Petersburg, averaging 83 mm of rain.
At least 1 mm of rain falls on 35% of August days, and the month averages 83 mm in total.
Warmest: 2022 (26.2°C)Latest: 2024 (23.1°C)10-year averageLong-run average (21.0°C)
Look Up a Day in August
See the weather in St. Petersburg on any August date, year by year.
Source: NOAA GHCN-Daily, St. Petersburg (1971–2025); Petrokrepost (2019–2025). Averages cover 1971–2025. How we compute this