Temperatuur — 2026
| Maand | Harlingen | Súdwest-Fryslân | Verschil |
|---|---|---|---|
| Jan | – | 1.7 °C | – |
| Feb | – | 3.9 °C | – |
| Mrt | 7.7 °C | 7.6 °C | +0.1 |
| Apr | 8.5 °C | 8.3 °C | +0.2 |
| Mei | 12.7 °C | 13.2 °C | -0.5 |
| Jun | 17 °C | 17.6 °C | -0.6 |
| Jul | 18.3 °C | 18.5 °C | -0.2 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |