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Aachen Weather by Month
Average temperatures, rainfall and humidity for Aachen, Germany, month by month, built from OpenWeather’s historical records. Use it to see what a typical Aachen month looks like before you travel — then check the live Aachen forecast for the days ahead.
Warmest month
July
24°C average high
Coolest month
January
1°C average low
Wettest month
October
72 mm of rain
Driest month
April
52 mm of rain
Average temperature and rainfall in Aachen 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 | -11°C / 15°C | 65 mm | 86% | 14 km/h |
| February | 8°C | 2°C | -10°C / 20°C | 65 mm | 81% | 15 km/h |
| March | 11°C | 3°C | -11°C / 24°C | 70 mm | 75% | 13 km/h |
| April | 15°C | 5°C | -7°C / 28°C | 52 mm | 70% | 11 km/h |
| May | 19°C | 9°C | -1°C / 32°C | 68 mm | 71% | 10 km/h |
| June | 23°C | 13°C | 5°C / 38°C | 70 mm | 70% | 11 km/h |
| July | 24°C | 14°C | 6°C / 40°C | 63 mm | 69% | 11 km/h |
| August | 24°C | 14°C | 6°C / 38°C | 65 mm | 72% | 11 km/h |
| September | 20°C | 11°C | 1°C / 36°C | 70 mm | 77% | 11 km/h |
| October | 15°C | 9°C | -2°C / 26°C | 72 mm | 83% | 13 km/h |
| November | 10°C | 5°C | -6°C / 20°C | 60 mm | 85% | 13 km/h |
| December | 7°C | 3°C | -8°C / 16°C | 66 mm | 86% | 15 km/h |
Best time to visit Aachen
The most comfortable time to visit Aachen is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rainfall is spread evenly across the months, totalling about 787 mm a year.
Travellers who prefer heat should aim for July, when highs average 24°C. October is the month to avoid if rain would spoil your plans — it averages 72 mm, roughly 1× the rainfall of the driest month (April).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Aachen forecast for what is happening now.