August is one of the warmer months of the year in Saint Petersburg, with average highs near 30.6°C and lows around 25.3°C (mean 28°C). It is a relatively wet time of year, averaging 220 mm of rainfall and 81% relative humidity across the period.
August is one of the warmer months of the year in Saint Petersburg. Across 45 years of records, the warmest August in Saint Petersburg was 2023 — when the month averaged 30.4°C — while the coldest was 1994 at 26.7°C. Typical August days reach 30.6°C with nights near 25.3°C. The long-term trend is warming, about 0.4°C per decade.
August is a relatively wet time of year in Saint Petersburg, averaging 220 mm of rainfall. The wettest August on record was 1981 with 325 mm, while the driest was 1996 at 114 mm.
Relative humidity in Saint Petersburg during August averages 81%. The most humid August was 2003 at 85%, and the least humid was 1993 at 73%.
August receives about 5.7 kWh/m²/day of solar energy in Saint Petersburg. The sunniest August was 2007 at 6.2 kWh/m²/day, and the cloudiest was 2003 at 5.1.
Average wind speed in Saint Petersburg during August is 2.2 m/s. The windiest August was 2008 at 3 m/s, while the calmest were 1990, 2006 and 2022 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.4°C | 27.7°C | 27.7°C | 28.1°C | 29.1°C | +1.7°C |
| Avg High | 30.0°C | 30.4°C | 30.3°C | 30.7°C | 32.1°C | +2.1°C |
| Avg Low | 24.7°C | 25.1°C | 25.1°C | 25.5°C | 26.1°C | +1.4°C |
| Avg Rain | 208 mm | 173 mm | 227 mm | 271 mm | 215 mm | +7 mm |
August temperatures in Saint Petersburg have risen by about 1.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 20.5°C (1984) to a record high of 36.8°C (2023).
Rainfall in August is a relatively wet time of year, averaging 220 mm, with a wettest year of 325 mm.
A quieter season to visit Saint Petersburg
If your dates are flexible, the more temperate months of April and November tend to be the most comfortable for visiting Saint Petersburg. That said, August — with days averaging 30.6°C and nights around 25.3°C (mean 28°C) and higher rainfall (220 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 32.3°C | 29.4°C | 26.6°C | 34.9°C | 24.7°C | 227 mm | 76% | 1.9 m/s | 5.6 |
| 2024 | 31.7°C | 28.9°C | 26.1°C | 33.1°C | 23.6°C | 231 mm | 80% | 2.8 m/s | 5.7 |
| 2023 🔥 | 34.1°C | 30.4°C | 26.8°C | 36.8°C | 24.5°C | 167 mm | 73% | 2.4 m/s | 5.9 |
| 2022 | 32.2°C | 28.9°C | 25.5°C | 34.1°C | 24.7°C | 198 mm | 76% | 1.7 m/s | 5.8 |
| 2021 | 30.6°C | 28.1°C | 25.5°C | 32.7°C | 24.6°C | 231 mm | 83% | 2.4 m/s | 5.4 |
| 2020 | 31.5°C | 28.7°C | 26.0°C | 34.2°C | 24.5°C | 239 mm | 78% | 2 m/s | 5.6 |
| 2019 | 30.5°C | 28.0°C | 25.6°C | 31.9°C | 24.2°C | 275 mm | 84% | 2.4 m/s | 5.2 |
| 2018 | 30.6°C | 27.8°C | 25.0°C | 32.1°C | 23.5°C | 199 mm | 81% | 2 m/s | 5.9 |
| 2017 | 30.9°C | 28.3°C | 25.6°C | 32.6°C | 23.4°C | 261 mm | 82% | 1.8 m/s | 6 |
| 2016 | 30.6°C | 28.0°C | 25.4°C | 32.8°C | 24.5°C | 320 mm | 83% | 2.5 m/s | 5.4 |
| 2015 | 30.4°C | 27.9°C | 25.5°C | 32.1°C | 24.2°C | 322 mm | 83% | 2 m/s | 5.5 |
| 2014 | 31.4°C | 28.6°C | 25.7°C | 33.7°C | 23.5°C | 158 mm | 78% | 1.9 m/s | 6 |
| 2013 | 30.5°C | 27.8°C | 25.0°C | 32.3°C | 22.9°C | 280 mm | 82% | 2.1 m/s | 5.9 |
| 2012 | 29.9°C | 27.4°C | 24.9°C | 31.7°C | 22.7°C | 316 mm | 82% | 2.3 m/s | 5.6 |
| 2011 | 31.1°C | 28.7°C | 26.3°C | 33.1°C | 24.7°C | 261 mm | 80% | 2.1 m/s | 5.5 |
| 2010 | 31.0°C | 28.4°C | 25.8°C | 33.0°C | 23.4°C | 322 mm | 80% | 2.4 m/s | 5.5 |
| 2009 | 30.3°C | 27.7°C | 25.2°C | 32.6°C | 23.8°C | 228 mm | 82% | 1.8 m/s | 5.6 |
| 2008 | 29.6°C | 27.3°C | 25.1°C | 31.3°C | 23.8°C | 301 mm | 83% | 3 m/s | 5.2 |
| 2007 | 31.4°C | 28.5°C | 25.6°C | 33.1°C | 23.5°C | 207 mm | 79% | 1.9 m/s | 6.2 |
| 2006 | 31.2°C | 28.3°C | 25.4°C | 33.4°C | 23.8°C | 180 mm | 77% | 1.7 m/s | 5.7 |
| 2005 | 30.8°C | 28.4°C | 26.0°C | 32.5°C | 24.4°C | 155 mm | 82% | 2 m/s | 6 |
| 2004 | 30.0°C | 27.7°C | 25.5°C | 31.7°C | 24.1°C | 323 mm | 84% | 2 m/s | 5.4 |
| 2003 | 29.5°C | 27.3°C | 25.1°C | 30.9°C | 23.9°C | 273 mm | 85% | 2.3 m/s | 5.1 |
| 2002 | 29.7°C | 27.0°C | 24.3°C | 31.5°C | 21.9°C | 268 mm | 84% | 2.3 m/s | 5.6 |
| 2001 | 30.1°C | 27.5°C | 24.8°C | 31.9°C | 22.9°C | 156 mm | 81% | 1.9 m/s | 5.8 |
| 2000 | 30.3°C | 27.3°C | 24.4°C | 31.8°C | 22.4°C | 177 mm | 79% | 2.2 m/s | 6 |
| 1999 | 30.6°C | 28.1°C | 25.7°C | 33.3°C | 23.9°C | 197 mm | 80% | 2.1 m/s | 5.7 |
| 1998 | 31.1°C | 28.3°C | 25.5°C | 33.5°C | 23.9°C | 156 mm | 79% | 2 m/s | 6.1 |
| 1997 | 30.5°C | 27.8°C | 25.0°C | 32.1°C | 22.0°C | 132 mm | 79% | 1.9 m/s | 6 |
| 1996 | 30.5°C | 27.7°C | 24.8°C | 32.2°C | 22.8°C | 114 mm | 77% | 2.2 m/s | 5.9 |
| 1995 | 30.4°C | 27.8°C | 25.2°C | 32.9°C | 22.4°C | 229 mm | 84% | 2.8 m/s | 5.7 |
| 1994 ❄️ | 29.1°C | 26.7°C | 24.3°C | 30.8°C | 23.2°C | 189 mm | 84% | 2.4 m/s | 5.5 |
| 1993 | 32.1°C | 28.8°C | 25.5°C | 35.3°C | 23.2°C | 158 mm | 73% | 2.2 m/s | 5.8 |
| 1992 | 29.2°C | 26.9°C | 24.7°C | 30.9°C | 23.5°C | 240 mm | 85% | 1.9 m/s | 5.2 |
| 1991 | 29.9°C | 27.5°C | 25.2°C | 31.3°C | 23.2°C | 174 mm | 83% | 2.1 m/s | 5.9 |
| 1990 | 30.1°C | 27.7°C | 25.3°C | 31.8°C | 24.0°C | 145 mm | 81% | 1.7 m/s | 5.8 |
| 1989 | 30.4°C | 27.5°C | 24.6°C | 32.5°C | 23.2°C | 146 mm | 80% | 1.9 m/s | 6.1 |
| 1988 | 29.7°C | 27.2°C | 24.8°C | 31.5°C | 23.5°C | 238 mm | 83% | 1.9 m/s | 5.6 |
| 1987 | 31.5°C | 28.4°C | 25.2°C | 33.1°C | 22.8°C | 134 mm | 77% | 2.1 m/s | 5.9 |
| 1986 | 29.7°C | 27.3°C | 24.8°C | 31.6°C | 23.6°C | 195 mm | 82% | 2.3 m/s | 5.8 |
| 1985 | 29.6°C | 27.3°C | 24.9°C | 30.9°C | 23.7°C | 269 mm | 83% | 2.6 m/s | 5.4 |
| 1984 | 29.6°C | 26.9°C | 24.1°C | 31.6°C | 20.5°C | 151 mm | 81% | 2 m/s | 5.9 |
| 1983 | 29.8°C | 27.4°C | 25.0°C | 31.8°C | 23.1°C | 226 mm | 83% | 2.1 m/s | — |
| 1982 | 29.7°C | 27.1°C | 24.6°C | 30.7°C | 22.6°C | 189 mm | 82% | 2.3 m/s | — |
| 1981 🌧️ | 30.0°C | 27.3°C | 24.6°C | 32.4°C | 23.4°C | 325 mm | 82% | 2.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 30.6°C with lows near 25.3°C (mean 28°C), based on 45 years of NASA POWER data.
August averages 220 mm of rainfall in Saint Petersburg, a relatively wet time of year. The wettest on record was 325 mm in 1981.
The hottest August reached 36.8°C in 2023. The coldest dipped to 20.5°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.9°C. Daytime highs moved from 29.7°C to 32.2°C and overnight lows from 24.6°C to 26.1°C over the same span.
August is one of the warmer months of the year in Saint Petersburg and a relatively wet time of year, so plan for around 30.6°C daytime highs and 25.3°C at night.
Not quite — August is the 11th coolest month in Saint Petersburg, averaging 28°C.
For August in Saint Petersburg, pack light, breathable clothing and sun protection, with typical highs of 30.6°C and lows of 25.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 81% — quite humid.
Average wind speed in August is 2.2 m/s. The windiest August on record averaged 3 m/s (2008).
The wettest August on record was 1981 with 325 mm. On average, August sees 220 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Saint Petersburg behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
