Luchtvochtigheid — 2020
| Monat | Haarlem | Heemstede | Unterschied |
|---|---|---|---|
| Jan | 88.3 % | 88 % | +0.3 |
| Feb | 80.4 % | 79.9 % | +0.5 |
| Mär | 75 % | 74.4 % | +0.6 |
| Apr | 69.8 % | 69.4 % | +0.4 |
| Mai | 73.9 % | 71.9 % | +2.0 |
| Jun | 77.9 % | 76.7 % | +1.2 |
| Jul | 78.9 % | 76.8 % | +2.1 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dez | – | – | – |