Climate averages 1991–2020
Rotterdam weather
in July.
A mild, moderately wet month: the warmest and one of the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Rotterdam: daytime highs average 21.7°C and nights cool to about 14.4°C. By daytime temperature it is the warmest month of the year.
Expect about 79 mm of rain on roughly 13 days, which makes July a moderately wet month (one of the wettest months of the year). Daylight, from sunrise to sunset, lasts about 16 h 12 min on an average July day.
The nearest other city in this atlas is Schiedam (6 km away). In July its highs average 21.6°C, about as warm as Rotterdam, with 79 mm of rain.
Among the 44 cities listed in the Netherlands, Rotterdam ranks joint 21st of 44 for the warmest July highs and joint 19th of 44 for the driest July (rainfall, lowest first). The mean July high of those 44 cities is 21.6°C; Rotterdam is 0.1°C warmer than that mean.
From July to August, average highs fall by 0.1°C to 21.6°C, and monthly rainfall stays at 79 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
Rotterdam climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.9°C1.6°C | 1.6°C | 62 | 12.2 | 8.38 h |
| February | 6.8°C1.5°C | 1.5°C | 52 | 10.9 | 9.910 h |
| March | 9.8°C3.2°C | 3.2°C | 53 | 11.3 | 11.812 h |
| April | 13.6°C5.6°C | 5.6°C | 48 | 10.9 | 13.914 h |
| May | 17.0°C9.2°C | 9.2°C | 61 | 11.5 | 15.616 h |
| June | 19.6°C12.1°C | 12.1°C | 64 | 11.0 | 16.617 h |
| July, selected | 21.7°C14.4°C | 14.4°C | 79 | 13.4 | 16.216 h |
| August | 21.6°C14.4°C | 14.4°C | 79 | 13.0 | 14.715 h |
| September | 18.5°C12.0°C | 12.0°C | 69 | 12.1 | 12.713 h |
| October | 14.3°C8.7°C | 8.7°C | 68 | 12.6 | 10.711 h |
| November | 9.7°C5.2°C | 5.2°C | 66 | 13.5 | 8.99 h |
| December | 6.4°C2.4°C | 2.4°C | 71 | 13.5 | 7.98 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
- Schiedam in JulyThe Netherlands · 6 kmHigh 21.6°C · Low 14.6°C · 79 mm rain
- Vlaardingen in JulyThe Netherlands · 9 kmHigh 21.3°C · Low 14.7°C · 73 mm rain
- Delft in JulyThe Netherlands · 13 kmHigh 21.1°C · Low 14.7°C · 73 mm rain
- Spijkenisse in JulyThe Netherlands · 13 kmHigh 21.6°C · Low 14.5°C · 75 mm rain
- Zoetermeer in JulyThe Netherlands · 15 kmHigh 21.2°C · Low 14.6°C · 79 mm rain
- Dordrecht in JulyThe Netherlands · 18 kmHigh 22.1°C · Low 14.3°C · 79 mm rain
- Gouda in JulyThe Netherlands · 19 kmHigh 21.6°C · Low 14.4°C · 86 mm rain
- The Hague in JulyThe Netherlands · 21 kmHigh 20.5°C · Low 14.9°C · 73 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 Rotterdam) is explained once on the Rotterdam year overview and on the Sources, method and limits page.
Zoetermeer and Schiedam lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.