In April, Haarlem typically sees daytime highs of 11.1°C and overnight lows around 4.0°C. Compared to the annual average high of 12.5°C, April runs -1.4°C.
April in Haarlem averages a daytime high of 11.1°C and an overnight low of 4.0°C.
April runs -1.4°C compared to Haarlem's annual average high of 12.5°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 11.1°C and cooler evenings around 4.0°C.