Climate in Bonn: average temperature by month
In Bonn the warmest month is July, with 22.8 °C on average in the afternoon; the coolest is January, with 3.8 °C.
The average of the weather stations Maastricht (96 km), Geisenheim (103 km) and Altastenberg (109 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | 3.8 °C | 3.5 °C – 4.3 °C |
| February | 5.4 °C | 4.4 °C – 6.9 °C |
| March | 9.2 °C | 7.0 °C – 11.2 °C |
| April | 13.4 °C | 11.4 °C – 15.3 °C |
| May | 17.8 °C | 15.5 °C – 19.8 °C |
| June | 21.3 °C | 19.9 °C – 22.5 °C |
| July | 22.8 °C | 22.3 °C – 23.5 °C |
| August | 22.6 °C | 21.1 °C – 23.4 °C |
| September | 18.8 °C | 15.9 °C – 21.0 °C |
| October | 13.5 °C | 10.9 °C – 15.7 °C |
| November | 7.8 °C | 5.4 °C – 10.7 °C |
| December | 4.8 °C | 4.3 °C – 5.3 °C |