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Climate guideThirty-year normals for Mainz
Mainz climate by month
Oceanic · CfbBest May–Jun · Sep
Annual mean11°day and night
Seasonal swing18°warmest vs coolest
Precipitation615 mm136 wet days a year
49.98° N, 8.28° EElevation 125 mUTC+1 · Central European Standard Time
When to goMainz · weather score
Best timeMay–Jun · Sep
October: high / low15° / 7°
iSummary
What the weather is like
Mainz has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is July, when afternoons average 26° and nights 15°. January is the coolest month, with highs of 5° and lows of 0°. The difference between the warmest and the coolest month is about 18°.
About 615 mm of precipitation falls in an average year. December is the wettest month (54 mm, 14 wet days) and September the driest (52 mm, 9 wet days). Cloud cover ranges from 33% in August to 56% in December.
Compared with Berlin, the capital, Mainz is 0.9° warmer on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 26° · July
- Coldest nights
- 0° · January
- Wettest month
- December
- Driest month
- September
- Clearest skies
- August · 33% cloud
- Longest day
- 16 h 20 min
- Shortest day
- 8 h 07 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 5° | 7° | 12° | 17° | 21° | 24° | 26° | 26° | 21° | 15° | 9° | 5° |
| Average low | 0° | 0° | 3° | 6° | 10° | 13° | 15° | 14° | 11° | 7° | 3° | 1° |
| Precipitation | 42 mm | 39 mm | 47 mm | 41 mm | 58 mm | 60 mm | 64 mm | 55 mm | 52 mm | 55 mm | 48 mm | 54 mm |
| Wet days (≥1 mm) | 12.4 | 10.8 | 10.4 | 9 | 11.7 | 11.8 | 13.1 | 12.5 | 8.8 | 10.8 | 11.1 | 13.6 |
| Cloud cover | 53% | 47% | 46% | 40% | 40% | 37% | 34% | 33% | 39% | 46% | 53% | 56% |
| Daylight | 8h 33 | 10h 06 | 11h 49 | 13h 45 | 15h 24 | 16h 20 | 15h 57 | 14h 31 | 12h 40 | 10h 49 | 9h 05 | 8h 07 |
| Month score | 19 | 25 | 35 | 67 | 68 | 69 | 63 | 66 | 76 | 51 | 22 | 15 |
ivMonth by month
Mainz in every month
January19
5° / 0°
42 mm · 12.4 wet days
February25
7° / 0°
39 mm · 10.8 wet days
March35
12° / 3°
47 mm · 10.4 wet days
April67
17° / 6°
41 mm · 9 wet days
May68
21° / 10°
58 mm · 11.7 wet days
June69
24° / 13°
60 mm · 11.8 wet days
July63
26° / 15°
64 mm · 13.1 wet days
August66
26° / 14°
55 mm · 12.5 wet days
September76
21° / 11°
52 mm · 8.8 wet days
October51
15° / 7°
55 mm · 10.8 wet days
November22
9° / 3°
48 mm · 11.1 wet days
December15
5° / 1°
54 mm · 13.6 wet days