Temperatuur — 2026
| Month | Hattem | Zwolle | Difference |
|---|---|---|---|
| Jan | – | 1.2 °C | – |
| Feb | – | 4.4 °C | – |
| Mar | 6.8 °C | 8.1 °C | -1.3 |
| Apr | 8.8 °C | 9.6 °C | -0.8 |
| May | 14 °C | 14 °C | +0.0 |
| Jun | 18.6 °C | 18.6 °C | +0.0 |
| Jul | 19.1 °C | 19.1 °C | +0.0 |
| Aug |
| 18.9 °C |
| 18.9 °C |
| +0.0 |
| Sep | 16.9 °C | 17.3 °C | -0.4 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |