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Mainz Weather, Climate and Best Time to Visit
Data source：Meteostat
Update date：2025-09
Mainz year round climate
- Spring (March–May): Average 7.7–15.7°C, mild climate with occasional showers, increasing sunshine hours. Popular activities: Walking along the Rhine River, visiting Mainz Cathedral. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
- Summer (June–August): Average 19.7–21.3°C, warm and humid climate with occasional thunderstorms. Popular activities: Outdoor picnics, cycling, visiting museums. Recommended clothing: Light and breathable clothing, sun hat, sunglasses.
- Autumn (September–November): Average 16.6–6.9°C, cool climate with higher rainfall and variable weather. Popular activities: Tasting local wines, visiting castles, enjoying autumn scenery. Recommended clothing: Warm jacket, comfortable trousers, rain gear.
- Winter (December–February): Average 3.3–5.9°C, cold climate with occasional snowfall and shorter daylight hours. Popular activities: Indoor museum visits, enjoying hot drinks, Christmas markets (December). Recommended clothing: Warm clothing, thick coat, scarf, gloves, hat.
Mainz climatological average
Annual average temperature: approx. 12°C / Annual rainfall: approx. 663 mm / Summer humidity: 65%–75% / Rainiest month: October
Mainz monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
3.3°C
56.5
February
5.9°C
39.3
March
7.7°C
55.6
April
9.7°C
44.4
May
15.7°C
57.1
June
19.7°C
38.6
July
20.9°C
61.8
August
21.3°C
45.8
September
16.6°C
76.8
October
12.8°C
77.5
November
6.9°C
68.3
December
3.6°C
41.9
Mainz weather for the next seven days
12/18
Thursday
Mist
9°C/4.7°C
12/19
Friday
Patchy rain nearby
7.5°C/4.4°C
12/20
Saturday
Patchy rain nearby
9.2°C/6.9°C
12/21
Sunday
Overcast
7.7°C/5.1°C
12/22
Monday
Partly Cloudy
6.5°C/3.1°C
12/23
Tuesday
Partly Cloudy
5.5°C/2.1°C
12/24
Wednesday
Partly Cloudy
5.6°C/2.7°C
