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Mainz Weather by Month

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

Warmest month

July

27°C average high

Coolest month

January

1°C average low

Wettest month

June

480 mm of rain

Driest month

February

45 mm of rain

Average temperature and rainfall in Mainz by month

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

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January5°C1°C-10°C / 15°C
57 mm
85%13 km/h
February8°C2°C-11°C / 19°C
45 mm
79%13 km/h
March12°C3°C-11°C / 24°C
51 mm
71%13 km/h
April16°C6°C-3°C / 28°C
45 mm
65%13 km/h
May20°C10°C1°C / 33°C
213 mm
68%12 km/h
June26°C15°C8°C / 42°C
480 mm
65%11 km/h
July27°C16°C8°C / 40°C
221 mm
62%11 km/h
August27°C16°C6°C / 40°C
54 mm
65%11 km/h
September22°C12°C4°C / 34°C
90 mm
74%11 km/h
October16°C8°C-3°C / 27°C
84 mm
84%10 km/h
November9°C4°C-6°C / 21°C
52 mm
87%11 km/h
December6°C2°C-15°C / 16°C
51 mm
88%12 km/h

Best time to visit Mainz

The most comfortable time to visit Mainz is generally April and August to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 1,444 mm a year.

Travellers who prefer heat should aim for July, when highs average 27°C. June is the month to avoid if rain would spoil your plans — it averages 480 mm, roughly 11× the rainfall of the driest month (February).

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

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