St. Petersburg Weather by Month

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

Warmest month

August

32°C average high

Coolest month

January

13°C average low

Wettest month

August

148 mm of rain

Driest month

April

33 mm of rain

Average temperature and rainfall in St. 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	21°C	13°C	-2°C / 29°C	51 mm	76%	14 km/h
February	23°C	15°C	1°C / 31°C	46 mm	77%	14 km/h
March	25°C	16°C	4°C / 31°C	67 mm	73%	15 km/h
April	28°C	19°C	10°C / 35°C	33 mm	72%	15 km/h
May	30°C	22°C	14°C / 36°C	64 mm	73%	14 km/h
June	31°C	25°C	19°C / 36°C	122 mm	77%	13 km/h
July	32°C	25°C	22°C / 35°C	136 mm	78%	11 km/h
August	32°C	25°C	22°C / 36°C	148 mm	78%	12 km/h
September	31°C	24°C	18°C / 36°C	138 mm	79%	13 km/h
October	29°C	22°C	9°C / 33°C	52 mm	76%	15 km/h
November	25°C	17°C	3°C / 32°C	52 mm	75%	14 km/h
December	23°C	15°C	0°C / 29°C	47 mm	78%	13 km/h

Best time to visit St. Petersburg

The most comfortable time to visit St. Petersburg is generally February and November to December, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around August, totalling about 956 mm a year.

Travellers who prefer heat should aim for August, when highs average 32°C. August is the month to avoid if rain would spoil your plans — it averages 148 mm, roughly 4× the rainfall of the driest month (April).

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