Saint Petersburg Weather by Month

Average temperatures, rainfall and humidity for Saint Petersburg, Russia, month by month, built from OpenWeather’s historical records. Use it to see what a typical Saint Petersburg month looks like before you travel — then check the live Saint Petersburg forecast for the days ahead.

Warmest month

July

23°C average high

Coolest month

January

-8°C average low

Wettest month

August

37 mm of rain

Driest month

January

16 mm of rain

Average temperature and rainfall in Saint Petersburg by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	-3°C	-8°C	-28°C / 8°C	16 mm	87%	14 km/h
February	-1°C	-6°C	-25°C / 8°C	31 mm	85%	14 km/h
March	3°C	-3°C	-24°C / 16°C	20 mm	77%	14 km/h
April	9°C	1°C	-9°C / 28°C	28 mm	69%	14 km/h
May	16°C	7°C	-2°C / 32°C	34 mm	65%	13 km/h
June	21°C	12°C	3°C / 34°C	27 mm	67%	12 km/h
July	23°C	14°C	6°C / 33°C	28 mm	72%	12 km/h
August	22°C	13°C	6°C / 32°C	37 mm	76%	12 km/h
September	17°C	9°C	1°C / 27°C	25 mm	79%	13 km/h
October	9°C	4°C	-9°C / 19°C	35 mm	84%	13 km/h
November	3°C	0°C	-19°C / 12°C	32 mm	88%	14 km/h
December	0°C	-4°C	-24°C / 10°C	22 mm	88%	15 km/h

Best time to visit Saint Petersburg

The most comfortable time to visit Saint Petersburg is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rainfall is spread evenly across the months, totalling about 336 mm a year.

Travellers who prefer heat should aim for July, when highs average 23°C. August is the month to avoid if rain would spoil your plans — it averages 37 mm, roughly 2× the rainfall of the driest month (January).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Saint Petersburg forecast for what is happening now.