Saint Petersburg weather in August
August in Saint Petersburg: nice, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Saint Petersburg · #177 of 604 destinations to visit in August · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Saint Petersburg climate normals — August
| Daytime high | 21°C / 69°F | 😎 nice |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 90 mm / 3.5 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 15°C / 58°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 15.6 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Saint Petersburg in August — FAQ
- Is August a good time to visit Saint Petersburg?
- August in Saint Petersburg: nice, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Saint Petersburg on SeasonMap's comfort score (86/100).
- What is the weather like in Saint Petersburg in August?
- In August, Saint Petersburg averages a daily high of 20.8°C and a low of 14°C, with about 89.5 mm of rain over roughly 12.4 rainy days.
- What is the air quality in Saint Petersburg in August?
- Saint Petersburg has a mean US Air Quality Index of about 40 in August.