Temperatuur — 2026
| Monat | Simpelveld | Heerlen | Unterschied |
|---|---|---|---|
| Jan | – | 2.8 °C | – |
| Feb | – | 6.5 °C | – |
| Mär | 5.3 °C | 8.6 °C | -3.3 |
| Apr | 8.2 °C | 9.4 °C | -1.2 |
| Mai | 14.4 °C | 15 °C | -0.6 |
| Jun | 19.4 °C | 20.2 °C | -0.8 |
| Jul | 19.9 °C | 20.9 °C | -1.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dez | – | – | – |