Saint Petersburg weather in May
May in Saint Petersburg: cool, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Saint Petersburg · #347 of 604 destinations to visit in May · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Saint Petersburg climate normals — May
| Daytime high | 14°C / 57°F | 🙂 cool |
|---|---|---|
| Nighttime low | 6°C / 42°F | |
| Feels like (high) | 11°C / 52°F | |
| Rainfall | 51 mm / 2 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 67% | 💧 humid |
| Dew point | 4°C / 38°F | |
| Sunshine | 12.3 h/day | |
| Daylight | 17.2 h | |
| Wind | 20 km/h / 13 mph | |
| Snowfall | 1.4 cm / 0.6 in | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Saint Petersburg in May — FAQ
- Is May a good time to visit Saint Petersburg?
- May in Saint Petersburg: cool, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Saint Petersburg on SeasonMap's comfort score (80/100).
- What is the weather like in Saint Petersburg in May?
- In May, Saint Petersburg averages a daily high of 13.8°C and a low of 5.8°C, with about 50.8 mm of rain over roughly 11.4 rainy days.
- What is the air quality in Saint Petersburg in May?
- Saint Petersburg has a mean US Air Quality Index of about 41 in May.
- Does it snow in Saint Petersburg in May?
- Saint Petersburg sees roughly 1.4 cm of snowfall in May.