Expect the average daily weather in Haarlem right-through April is 16. Through the month the highs are about 22 and lows around 13 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 16 |
| High Temperature | 22 |
| Low Temperature | 13 |
Useful Links: Haarlem Weather: Average Weather & Yearly Climate