Climate averages 1991–2020
Alphen aan den Rijn 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 Alphen aan den Rijn: daytime highs average 13.3°C and nights cool to about 5.6°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 49 mm of rain on roughly 11 days, which makes April a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 52 min on an average April day.
The nearest other city in this atlas is Leiden (12 km away). In April its highs average 12.5°C, 0.8°C cooler than Alphen aan den Rijn, with 45 mm of rain.
Among the 44 cities listed in the Netherlands, Alphen aan den Rijn ranks 28th of 44 for the warmest April highs and joint 27th of 44 for the driest April (rainfall, lowest first). The mean April high of those 44 cities is 13.4°C; Alphen aan den Rijn is 0.1°C cooler than that mean.
From April to May, average highs rise by 3.4°C to 16.7°C, and monthly rainfall rises from 49 mm to 62 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
Alphen aan den Rijn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.9°C1.7°C | 1.7°C | 69 | 13.3 | 8.38 h |
| February | 6.6°C1.5°C | 1.5°C | 56 | 11.1 | 9.910 h |
| March | 9.6°C3.2°C | 3.2°C | 55 | 11.2 | 11.812 h |
| April, selected | 13.3°C5.6°C | 5.6°C | 49 | 10.7 | 13.914 h |
| May | 16.7°C9.2°C | 9.2°C | 62 | 10.9 | 15.716 h |
| June | 19.3°C12.1°C | 12.1°C | 66 | 11.7 | 16.717 h |
| July | 21.4°C14.4°C | 14.4°C | 83 | 13.4 | 16.216 h |
| August | 21.3°C14.5°C | 14.5°C | 90 | 13.3 | 14.715 h |
| September | 18.3°C12.1°C | 12.1°C | 81 | 12.8 | 12.713 h |
| October | 14.2°C8.8°C | 8.8°C | 84 | 13.7 | 10.711 h |
| November | 9.6°C5.3°C | 5.3°C | 75 | 14.1 | 8.99 h |
| December | 6.4°C2.5°C | 2.5°C | 79 | 14.0 | 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
- Leiden in AprilThe Netherlands · 12 kmHigh 12.5°C · Low 6.0°C · 45 mm rain
- Gouda in AprilThe Netherlands · 13 kmHigh 13.5°C · Low 5.6°C · 52 mm rain
- Zoetermeer in AprilThe Netherlands · 14 kmHigh 13.1°C · Low 5.8°C · 48 mm rain
- Hoofddorp in AprilThe Netherlands · 19 kmHigh 12.5°C · Low 6.2°C · 49 mm rain
- Amstelveen in AprilThe Netherlands · 24 kmHigh 13.0°C · Low 5.8°C · 49 mm rain
- Delft in AprilThe Netherlands · 25 kmHigh 13.1°C · Low 5.9°C · 44 mm rain
- The Hague in AprilThe Netherlands · 25 kmHigh 12.4°C · Low 6.1°C · 44 mm rain
- Rotterdam in AprilThe Netherlands · 26 kmHigh 13.6°C · Low 5.6°C · 48 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 Alphen aan den Rijn) is explained once on the Alphen aan den Rijn year overview and on the Sources, method and limits page.
Hoofddorp and Amstelveen lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.