Rank 74 of 80
9.5 hot days a year, average 2016–2025. In 1951–1960 it was 2.0.
Bremen today has the summers Mannheim had in the fifties.
| Period | Hot days | Rank | |
|---|---|---|---|
| 1951–1960 | 2.0 | 74 | |
| 1961–1970 | 2.3 | 73 | |
| 1971–1980 | 4.3 | 63 | |
| 1981–1990 | 3.1 | 75 | |
| 1991–2000 | 5.4 | 76 | |
| 2001–2010 | 6.3 | 76 | |
| 2006–2015 | 6.0 | 74 | |
| 2016–2025 | 9.5 | 74 |
This figure describes the location of Bremen. 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.
Bremen has a published heat action plan: „Hitzeaktionsplan für das Land Bremen und seine beiden Stadtgemeinden Bremen und Bremerhaven“ (2024).
Research as of 24 October 2026. Corrections and tips to kontakt@julianzuber.de.
For Bremen this has been analysed across the city area: trees, land, planting search areas. deutschland-hitzesicher.de/bremen-hitzesicher (in German)
Each city has its own access to its map. Enquiries to kontakt@julianzuber.de.