Climate averages 1991–2020
Saint Petersburg weather
in August.
A mild, moderately wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Saint Petersburg: daytime highs average 19.7°C and nights cool to about 13.5°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 70 mm of rain on roughly 11 days, which makes August a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 15 h 39 min on an average August day.
The nearest other city in this atlas is Peterhof (24 km away). In August its highs average 18.9°C, 0.8°C cooler than Saint Petersburg, with 74 mm of rain.
Among the 236 cities listed in Russia, Saint Petersburg ranks 202nd of 236 for the warmest August highs and joint 152nd of 236 for the driest August (rainfall, lowest first). The mean August high of those 236 cities is 22.4°C; Saint Petersburg is 2.7°C cooler than that mean.
From August to September, average highs fall by 5.4°C to 14.4°C, and monthly rainfall falls from 70 mm to 55 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Saint Petersburg climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -3.8°C-7.7°C | -7.7°C | 41 | 11.2 | 6.87 h |
| February | -4.0°C-8.4°C | -8.4°C | 32 | 9.2 | 9.19 h |
| March | 0.3°C-5.3°C | -5.3°C | 36 | 9.1 | 11.812 h |
| April | 7.1°C-0.1°C | -0.1°C | 39 | 9.3 | 14.515 h |
| May | 14.0°C6.1°C | 6.1°C | 50 | 9.2 | 17.117 h |
| June | 18.5°C11.1°C | 11.1°C | 64 | 11.4 | 18.719 h |
| July | 21.5°C14.6°C | 14.6°C | 65 | 11.1 | 18.018 h |
| August, selected | 19.7°C13.5°C | 13.5°C | 70 | 11.2 | 15.616 h |
| September | 14.4°C9.1°C | 9.1°C | 55 | 11.0 | 13.013 h |
| October | 7.3°C3.5°C | 3.5°C | 62 | 12.3 | 10.210 h |
| November | 1.6°C-1.4°C | -1.4°C | 56 | 12.0 | 7.68 h |
| December | -1.6°C-5.0°C | -5.0°C | 49 | 12.2 | 6.16 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Peterhof in AugustRussia · 24 kmHigh 18.9°C · Low 13.5°C · 74 mm rain
- Pushkin in AugustRussia · 25 kmHigh 20.1°C · Low 12.5°C · 85 mm rain
- Kolpino in AugustRussia · 26 kmHigh 20.2°C · Low 13.1°C · 85 mm rain
- Gatchina in AugustRussia · 42 kmHigh 19.9°C · Low 12.4°C · 82 mm rain
- Vyborg in AugustRussia · 121 kmHigh 19.6°C · Low 13.6°C · 71 mm rain
- Velikiy Novgorod in AugustRussia · 167 kmHigh 20.6°C · Low 14.2°C · 82 mm rain
- Lappeenranta in AugustFinland · 170 kmHigh 19.6°C · Low 13.1°C · 75 mm rain
- Kouvola in AugustFinland · 224 kmHigh 19.8°C · Low 12.9°C · 66 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Saint Petersburg) is explained once on the Saint Petersburg year overview and on the Sources, method and limits page.