Rank 43 of 80
13.2 hot days a year, average 2016–2025. In 1951–1960 it was 4.3.
Bonn has no historical counterpart: no major German city was as hot in 1951–1960 as Bonn is today.
| Period | Hot days | Rank | |
|---|---|---|---|
| 1951–1960 | 4.3 | 40 | |
| 1961–1970 | 5.5 | 32 | |
| 1971–1980 | 6.8 | 28 | |
| 1981–1990 | 7.2 | 25 | |
| 1991–2000 | 9.8 | 28 | |
| 2001–2010 | 10.1 | 41 | |
| 2006–2015 | 9.4 | 37 | |
| 2016–2025 | 13.2 | 43 |
This figure describes the location of Bonn. No city administration decides on location. On shade over streets, schoolyards and playgrounds, it does.
What can be changed
This measures the share of residential surroundings covered by trees – from the satellite, weighted by the population of the same 100 m cells as the heat figure above. Both figures therefore apply to the same places and can stand side by side. Parks, cemeteries and gardens count. The city’s stock of street trees requires the tree register.
A heat action plan is documented for Bonn, but we did not find a published document: it is in progress, announced or adopted. Source: „Hitzeaktionsplan der Bundesstadt Bonn“.
Research as of 24 October 2026. Corrections and tips to kontakt@julianzuber.de.
For Bonn this has been analysed across the city area: trees, land, heat stress. deutschland-hitzesicher.de/bonn-hitzesicher (in German)
Each city has its own access to its map. Enquiries to kontakt@julianzuber.de.