Aachen Weather

As the westernmost city in Germany , with humid weather, mild winters, and warm summers. Because of its location north of the Eifel and the High Fens and its subsequent prevailing westerly weather patterns, rainfall in Aachen (on average 805 mm/year) is comparatively higher than, for example, in Bonn (with 669 mm/year). Another factor in the local weather forces of Aachen is the occurrence of Foehn winds on the southerly air currents, which results from the city’s geographic location on the northern edge of the Eifel.

Because the city is surrounded by hills, it suffers from inversion-related smog. Some areas of the city have become urban heat islands as a result of poor heat exchange, both because of the area’s natural geography and from human activity. The city’s numerous cold air corridors, which are slated to remain as free as possible from new construction, therefore play an important role in the urban climate of Aachen.

The January average is
3.0 °C (37 °F), while the July average is 18.5 °C (65 °F). Precipitation is almost evenly spread throughout the year.

Average Temperature
Jan
39 °F
4 °C
Feb
49 °F
10 °C
Mar
50 °F
10 °C
Apr
57 °F
14 °C
May
57 °F
14 °C
Jun
72 °F
22 °C
Jul
70 °F
21 °C
Aug
72 °F
22 °C
Sep
64 °F
18 °C
Oct
57 °F
14 °C
Nov
46 °F
8 °C
Dec
43 °F
6 °C
Humidity
Jan
80%
Feb
74%
Mar
73%
Apr
69%
May
77%
Jun
70%
Jul
69%
Aug
72%
Sep
76%
Oct
82%
Nov
82%
Dec
80%
Rain
Jan
30mm
Feb
20mm
Mar
43mm
Apr
21mm
May
30mm
Jun
187mm
Jul
40mm
Aug
38mm
Sep
33mm
Oct
52mm
Nov
37mm
Dec
46mm
Clouds
Jan
87%
Feb
60%
Mar
78%
Apr
56%
May
66%
Jun
53%
Jul
56%
Aug
49%
Sep
61%
Oct
82%
Nov
84%
Dec
84%
Air quality US AQI
Jan
18
Feb
23
Mar
18
Apr
20
May
19
Jun
16
Jul
18
Aug
17
Sep
14
Oct
15
Nov
18
Dec
13
Sun
Jan
1UVI
Feb
2UVI
Mar
2UVI
Apr
4UVI
May
5UVI
Jun
6UVI
Jul
5UVI
Aug
5UVI
Sep
4UVI
Oct
2UVI
Nov
1UVI
Dec
1UVI