North Rhine-Westphalia weather in September
September is one of the best months to visit North Rhine-Westphalia: highs of 20°C (69°F) and about 57 mm (2.2 in) of rain on average. Nights average 10°C (50°F) and cloud cover 64% (NASA POWER, 2001–2025 averages). It is the 2nd driest month of the year and the 4th warmest. Compared with August, it is cooler and drier; October brings highs of 15°C (59°F) and 61 mm (2.4 in) of rain.
Figures are long-term averages for Köln, the largest city in North Rhine-Westphalia. See below for other places.
Is September a good time to visit North Rhine-Westphalia?
best month Weather score 78/100.
Yes. September is one of the best months for weather in North Rhine-Westphalia.
Does it rain a lot in North Rhine-Westphalia in September?
No, it is usually dry: about 57 mm (2.2 in) falls in an average September. It is the 2nd driest month of the year.
How warm is North Rhine-Westphalia in September?
Days average 20°C (69°F) and nights 10°C (50°F).
North Rhine-Westphalia weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 4°C (40°F) | -1°C (30°F) | 74 mm | 79% | least pleasant |
| February | 6°C (42°F) | -1°C (30°F) | 62 mm | 76% | least pleasant |
| March | 10°C (49°F) | 1°C (33°F) | 59 mm | 70% | least pleasant |
| April | 15°C (59°F) | 4°C (40°F) | 44 mm | 66% | best |
| May | 19°C (66°F) | 8°C (47°F) | 64 mm | 71% | best |
| June | 23°C (73°F) | 12°C (53°F) | 68 mm | 71% | best |
| July | 25°C (76°F) | 14°C (57°F) | 75 mm | 68% | best |
| August | 24°C (76°F) | 14°C (56°F) | 79 mm | 67% | best |
| September | 20°C (69°F) | 10°C (50°F) | 57 mm | 64% | best |
| October | 15°C (59°F) | 6°C (43°F) | 61 mm | 71% | fair |
| November | 9°C (48°F) | 3°C (37°F) | 71 mm | 79% | least pleasant |
| December | 5°C (41°F) | 0°C (32°F) | 77 mm | 81% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across North Rhine-Westphalia in September
Weather can differ a lot within North Rhine-Westphalia: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Köln | 20°C (69°F) | 10°C (50°F) | 57 mm | best |
| Düsseldorf | 20°C (69°F) | 10°C (50°F) | 57 mm | best |
| Essen | 20°C (67°F) | 10°C (50°F) | 62 mm | best |
| Dortmund | 20°C (67°F) | 10°C (49°F) | 67 mm | best |
| Duisburg | 20°C (67°F) | 10°C (50°F) | 62 mm | best |
| Bochum | 20°C (67°F) | 10°C (49°F) | 67 mm | best |
| Wuppertal | 20°C (67°F) | 10°C (50°F) | 62 mm | best |
| Bielefeld | 19°C (67°F) | 10°C (49°F) | 59 mm | best |
| Bonn | 19°C (66°F) | 8°C (47°F) | 58 mm | best |
| Münster | 20°C (67°F) | 10°C (50°F) | 59 mm | best |
| Gelsenkirchen | 20°C (67°F) | 10°C (50°F) | 62 mm | best |
| Aachen | 20°C (69°F) | 10°C (50°F) | 53 mm | best |