Weather in Bonn in September
In an average September, Bonn sees a daily high around 19°C and a low around 11°C, based on 1980–2026 of local climate records.
| Average high | 19°C |
|---|---|
| Typical high range | 14°C to 26°C |
| Average low | 11°C |
| Typical low range | 7°C to 15°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
34°C
2020-09-15
Lowest
10°C
2025-09-25
Low
Highest
19°C
2016-09-14
Lowest
2°C
2018-09-29
Feels-like
Highest
37°C
2020-09-15
Lowest
-1°C
2022-09-30
Humidity
Highest
16.1 g/m³
2024-09-02
Lowest
6.0 g/m³
2002-09-24
Wind
Highest
40 km/h
1998-09-15
Lowest
3 km/h
2016-09-20
Gust
Highest
82 km/h
1998-09-14
Lowest
11 km/h
2016-09-20
Precip
Wettest
162 mm
1998
Driest
21 mm
2016
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