Mainz weather by month

Warmest month

July

27°C average high

Coolest month

February

1°C average low

Wettest month

June

482 mm of rain

Driest month

February

40 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.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	6°C	1°C	-9°C / 13°C	60 mm	86%	11 km/h
February	7°C	1°C	-6°C / 18°C	40 mm	80%	11 km/h
March	11°C	3°C	-9°C / 19°C	52 mm	72%	14 km/h
April	16°C	6°C	0°C / 24°C	43 mm	67%	14 km/h
May	19°C	9°C	1°C / 30°C	216 mm	67%	12 km/h
June	25°C	15°C	9°C / 38°C	482 mm	65%	11 km/h
July	27°C	16°C	11°C / 39°C	223 mm	62%	11 km/h
August	27°C	16°C	10°C / 39°C	52 mm	67%	10 km/h
September	22°C	13°C	4°C / 33°C	86 mm	73%	11 km/h
October	15°C	8°C	2°C / 25°C	82 mm	85%	11 km/h
November	10°C	5°C	-2°C / 16°C	50 mm	87%	11 km/h
December	6°C	2°C	-6°C / 13°C	52 mm	89%	11 km/h

Frost and snow-likely months in Mainz

Nights in Mainz average 2°C or below in 2 months (January and February). No month combines freezing average lows with 10 mm or more of precipitation, so snow is uncommon. The coldest month is February with an average low of 1°C and a record low of -6°C.

January: average low 1°C, record low -9°C, 60 mm of precipitation
February: average low 1°C, record low -6°C, 40 mm of precipitation

These records carry temperature and precipitation, not snowfall totals.

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 1,439 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 482 mm, roughly 12× the rainfall of the driest month (February).

Mainz climate: your questions

Does it snow a lot in Mainz?

Rarely: nights dip to 2°C or below only in January and February, and the coldest month, February, averages a low of 1°C (record low -6°C), so snow is uncommon. Our records carry temperature and precipitation, not snowfall totals. What is falling now: Mainz weather today.

When is it going to snow in Mainz this month?

Mainz's winter months average lows of 2°C in December, 1°C in January and 1°C in February, with about 152 mm of precipitation across the three; 0 of them sit at or below 0°C, so snow is unlikely. The records hold no snowfall totals. The next 15 days: Mainz 10-day forecast.

When is the best time to visit Mainz?

April and August to September are the most comfortable months in Mainz, with highs near 22°C. July is the warmest month, averaging 27°C by day; June is the wettest, with 482 mm; and February is the coolest, with lows near 1°C. What it is doing today: Mainz weather today.

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