Climate averages 1991–2020
Alphen aan den Rijn weather
in July.
A mild, moderately wet month: the warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Alphen aan den Rijn: daytime highs average 21.4°C and nights cool to about 14.4°C. By daytime temperature it is the warmest month of the year.
Expect about 83 mm of rain on roughly 13 days, which makes July a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 14 min on an average July day.
The nearest other city in this atlas is Leiden (12 km away). In July its highs average 20.6°C, 0.8°C cooler than Alphen aan den Rijn, with 77 mm of rain.
Among the 44 cities listed in the Netherlands, Alphen aan den Rijn ranks 28th of 44 for the warmest July highs and joint 37th of 44 for the driest July (rainfall, lowest first). The mean July high of those 44 cities is 21.6°C; Alphen aan den Rijn is 0.2°C cooler than that mean.
From July to August, average highs fall by 0.1°C to 21.3°C, and monthly rainfall rises from 83 mm to 90 mm.
The annual picture
July 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 | 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, selected | 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
July in nearby cities
- Leiden in JulyThe Netherlands · 12 kmHigh 20.6°C · Low 14.8°C · 77 mm rain
- Gouda in JulyThe Netherlands · 13 kmHigh 21.6°C · Low 14.4°C · 86 mm rain
- Zoetermeer in JulyThe Netherlands · 14 kmHigh 21.2°C · Low 14.6°C · 79 mm rain
- Hoofddorp in JulyThe Netherlands · 19 kmHigh 20.5°C · Low 14.9°C · 83 mm rain
- Amstelveen in JulyThe Netherlands · 24 kmHigh 21.1°C · Low 14.6°C · 83 mm rain
- Delft in JulyThe Netherlands · 25 kmHigh 21.1°C · Low 14.7°C · 73 mm rain
- The Hague in JulyThe Netherlands · 25 kmHigh 20.5°C · Low 14.9°C · 73 mm rain
- Rotterdam in JulyThe Netherlands · 26 kmHigh 21.7°C · Low 14.4°C · 79 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.