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Weather by month

Kostroma Weather by Month

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

Warmest month

July

23°C average high

Coolest month

January

-13°C average low

Wettest month

July

49 mm of rain

Driest month

January

3 mm of rain

Average temperature and rainfall in Kostroma 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	-6°C	-13°C	-39°C / 5°C	3 mm	90%	15 km/h
February	-4°C	-11°C	-33°C / 8°C	3 mm	90%	15 km/h
March	1°C	-7°C	-29°C / 17°C	13 mm	87%	14 km/h
April	9°C	0°C	-18°C / 24°C	42 mm	75%	15 km/h
May	17°C	7°C	-3°C / 31°C	42 mm	67%	14 km/h
June	21°C	11°C	2°C / 34°C	40 mm	71%	13 km/h
July	23°C	14°C	5°C / 32°C	49 mm	75%	12 km/h
August	22°C	12°C	4°C / 33°C	43 mm	74%	13 km/h
September	16°C	8°C	-2°C / 26°C	46 mm	80%	14 km/h
October	7°C	2°C	-20°C / 21°C	37 mm	85%	15 km/h
November	0°C	-3°C	-18°C / 12°C	23 mm	89%	15 km/h
December	-4°C	-9°C	-29°C / 6°C	8 mm	91%	15 km/h

Best time to visit Kostroma

The most comfortable time to visit Kostroma is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around July, totalling about 349 mm a year.

Travellers who prefer heat should aim for July, when highs average 23°C. July is the month to avoid if rain would spoil your plans — it averages 49 mm, roughly 17× the rainfall of the driest month (January).

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