Climate averages 1991–2020
Haarlem weather
in August.
A mild, wet month: the warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Haarlem: daytime highs average 20.3°C and nights cool to about 15.4°C. By daytime temperature it is the warmest month of the year.
Expect about 90 mm of rain on roughly 13 days, which makes August a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 42 min on an average August day.
The nearest other city in this atlas is Hoofddorp (9 km away). In August its highs average 20.7°C, about as warm as Haarlem, with 90 mm of rain.
Among the 44 cities listed in the Netherlands, Haarlem ranks 43rd of 44 for the warmest August highs and joint 37th of 44 for the driest August (rainfall, lowest first). The mean August high of those 44 cities is 21.5°C; Haarlem is 1.3°C cooler than that mean.
From August to September, average highs fall by 2.6°C to 17.7°C, and monthly rainfall falls from 90 mm to 84 mm.
The annual picture
August 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 | 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, selected | 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
August in nearby cities
- Hoofddorp in AugustThe Netherlands · 9 kmHigh 20.7°C · Low 15.2°C · 90 mm rain
- Zaandam in AugustThe Netherlands · 14 kmHigh 20.6°C · Low 15.2°C · 90 mm rain
- Zaanstad in AugustThe Netherlands · 14 kmHigh 20.4°C · Low 15.3°C · 90 mm rain
- Amsterdam in AugustThe Netherlands · 17 kmHigh 20.8°C · Low 14.8°C · 81 mm rain
- Amstelveen in AugustThe Netherlands · 18 kmHigh 21.1°C · Low 14.7°C · 90 mm rain
- Purmerend in AugustThe Netherlands · 26 kmHigh 20.8°C · Low 14.9°C · 79 mm rain
- Leiden in AugustThe Netherlands · 27 kmHigh 20.8°C · Low 15.1°C · 90 mm rain
- Alphen aan den Rijn in AugustThe Netherlands · 28 kmHigh 21.3°C · Low 14.5°C · 90 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.