Temperatuur — 2026
| Maand | Voorschoten | Leiden | Verschil |
|---|---|---|---|
| Jan | – | 3.1 °C | – |
| Feb | – | 5.8 °C | – |
| Mrt | 7.9 °C | 8.7 °C | -0.8 |
| Apr | 9.5 °C | 10.2 °C | -0.7 |
| Mei | 14.5 °C | 13.8 °C | +0.7 |
| Jun | 18.8 °C | 18 °C | +0.8 |
| Jul | 19.8 °C | 19.3 °C | +0.5 |
| Aug |
| 19.3 °C |
| 19.3 °C |
| +0.0 |
| Sep | 17 °C | 17.3 °C | -0.3 |
| Okt | 12.8 °C | 13.5 °C | -0.7 |
| Nov | – | – | – |
| Dec | – | – | – |