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Climate guideThirty-year normals for Aachen
Aachen climate by month
Oceanic · CfbBest May–Jun · Sep
Annual mean11°day and night
Seasonal swing16°warmest vs coolest
Precipitation933 mm152 wet days a year
50.78° N, 6.08° EElevation 266 mUTC+2 · Central European Summer Time
When to goAachen · weather score
Best timeMay–Jun · Sep
October: high / low15° / 8°
iSummary
What the weather is like
Aachen has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is July, when afternoons average 24° and nights 14°. January is the coolest month, with highs of 6° and lows of 1°. The difference between the warmest and the coolest month is about 16°.
About 933 mm of precipitation falls in an average year. December is the wettest month (89 mm, 15 wet days) and April the driest (60 mm, 10 wet days). Cloud cover ranges from 36% in August to 55% in December.
Compared with Berlin, the capital, Aachen is 1.6° cooler on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 24° · July
- Coldest nights
- 1° · January
- Wettest month
- December
- Driest month
- April
- Clearest skies
- August · 36% cloud
- Longest day
- 16 h 28 min
- Shortest day
- 7 h 59 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 | 6° | 7° | 10° | 15° | 19° | 21° | 24° | 23° | 20° | 15° | 9° | 6° |
| Average low | 1° | 1° | 3° | 5° | 9° | 12° | 14° | 14° | 11° | 8° | 4° | 1° |
| Precipitation | 82 mm | 74 mm | 77 mm | 60 mm | 75 mm | 85 mm | 82 mm | 81 mm | 74 mm | 76 mm | 78 mm | 89 mm |
| Wet days (≥1 mm) | 14.2 | 12.4 | 12.3 | 9.8 | 12.4 | 12.6 | 13.9 | 14 | 10.3 | 12.2 | 13.2 | 14.9 |
| Cloud cover | 52% | 49% | 48% | 43% | 43% | 41% | 37% | 36% | 42% | 47% | 51% | 55% |
| Daylight | 8h 26 | 10h 03 | 11h 49 | 13h 48 | 15h 30 | 16h 28 | 16h 05 | 14h 35 | 12h 41 | 10h 47 | 8h 59 | 7h 59 |
| Month score | 16 | 21 | 24 | 55 | 65 | 66 | 64 | 65 | 71 | 47 | 18 | 15 |
ivMonth by month
Aachen in every month
January16
6° / 1°
82 mm · 14.2 wet days
February21
7° / 1°
74 mm · 12.4 wet days
March24
10° / 3°
77 mm · 12.3 wet days
April55
15° / 5°
60 mm · 9.8 wet days
May65
19° / 9°
75 mm · 12.4 wet days
June66
21° / 12°
85 mm · 12.6 wet days
July64
24° / 14°
82 mm · 13.9 wet days
August65
23° / 14°
81 mm · 14 wet days
September71
20° / 11°
74 mm · 10.3 wet days
October47
15° / 8°
76 mm · 12.2 wet days
November18
9° / 4°
78 mm · 13.2 wet days
December15
6° / 1°
89 mm · 14.9 wet days