Climate averages 1991–2020
Haarlem weather
in April.
A cool, moderately wet month: the 7th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Haarlem: daytime highs average 12.0°C and nights cool to about 6.3°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 44 mm of rain on roughly 10 days, which makes April a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 53 min on an average April day.
The nearest other city in this atlas is Hoofddorp (9 km away). In April its highs average 12.5°C, about as warm as Haarlem, with 49 mm of rain.
Among the 44 cities listed in the Netherlands, Haarlem ranks 42nd of 44 for the warmest April highs and joint 3rd of 44 for the driest April (rainfall, lowest first). The mean April high of those 44 cities is 13.4°C; Haarlem is 1.4°C cooler than that mean.
From April to May, average highs rise by 3.3°C to 15.3°C, and monthly rainfall rises from 44 mm to 58 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Haarlem climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.8°C2.5°C | 2.5°C | 69 | 13.2 | 8.38 h |
| February | 6.1°C2.3°C | 2.3°C | 54 | 11.0 | 9.910 h |
| March | 8.6°C3.9°C | 3.9°C | 52 | 10.7 | 11.812 h |
| April, selected | 12.0°C6.3°C | 6.3°C | 44 | 10.1 | 13.914 h |
| May | 15.3°C9.8°C | 9.8°C | 58 | 10.4 | 15.716 h |
| June | 17.8°C12.7°C | 12.7°C | 63 | 11.3 | 16.717 h |
| July | 20.0°C15.1°C | 15.1°C | 79 | 13.0 | 16.316 h |
| August | 20.3°C15.4°C | 15.4°C | 90 | 13.3 | 14.715 h |
| September | 17.7°C13.2°C | 13.2°C | 84 | 12.7 | 12.713 h |
| October | 13.9°C9.9°C | 9.9°C | 88 | 14.1 | 10.711 h |
| November | 9.6°C6.3°C | 6.3°C | 77 | 14.8 | 8.89 h |
| December | 6.6°C3.5°C | 3.5°C | 79 | 14.2 | 7.88 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Hoofddorp in AprilThe Netherlands · 9 kmHigh 12.5°C · Low 6.2°C · 49 mm rain
- Zaandam in AprilThe Netherlands · 14 kmHigh 12.5°C · Low 6.2°C · 44 mm rain
- Zaanstad in AprilThe Netherlands · 14 kmHigh 12.2°C · Low 6.3°C · 44 mm rain
- Amsterdam in AprilThe Netherlands · 17 kmHigh 12.7°C · Low 5.9°C · 50 mm rain
- Amstelveen in AprilThe Netherlands · 18 kmHigh 13.0°C · Low 5.8°C · 49 mm rain
- Purmerend in AprilThe Netherlands · 26 kmHigh 12.7°C · Low 5.9°C · 45 mm rain
- Leiden in AprilThe Netherlands · 27 kmHigh 12.5°C · Low 6.0°C · 45 mm rain
- Alphen aan den Rijn in AprilThe Netherlands · 28 kmHigh 13.3°C · Low 5.6°C · 49 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Haarlem) is explained once on the Haarlem year overview and on the Sources, method and limits page.
Zaanstad and Zaandam lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.