Rotterdam has a mild climate with cool winters and pleasant summers. Using NASA POWER data for 2014–2023, average daily highs rise from 6 °C in January to 22 °C in July and August, and the city receives about 833 mm of rain a year. It lies only about 9 m above sea level, and Rotterdam The Hague Airport (RTM) is about 5 km away.
For exploring the modern architecture, the harbour and Markthal on foot, late spring and summer are the most comfortable: May averages highs of 16 °C, June 20 °C, and July and August 22 °C. April is the driest month, with about 40 mm of rain, and May stays fairly dry at 53 mm.
September is still mild, with highs of 20 °C, but rain picks up into autumn. October and November are the wettest months at about 87 mm each, and December follows with 85 mm, so pack a waterproof layer and plan some indoor time, for example at Markthal.
Winter is cool rather than freezing: highs are 6 °C in January, 7 °C in February and 8 °C in December, with average lows of 3 °C to 4 °C. With 81 mm of rain in January, a warm, waterproof coat is the most useful thing to pack.
Updated:
Weather month by month
| Month | Average daytime high | Rain |
|---|---|---|
| January | 6 °C | 81 mm |
| February | 7 °C | 65 mm |
| March | 9 °C | 61 mm |
| April | 12 °C | 40 mm |
| May | 16 °C | 53 mm |
| June | 20 °C | 61 mm |
| July | 22 °C | 64 mm |
| August | 22 °C | 78 mm |
| September | 20 °C | 71 mm |
| October | 15 °C | 87 mm |
| November | 10 °C | 87 mm |
| December | 8 °C | 85 mm |
Daily averages 2014–2023, NASA POWER, adjusted to the city centre's elevation. A guide, not a forecast.
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Questions travellers ask
- What is the best month to visit Rotterdam?
- For warm and fairly dry weather, May to September work well, with average highs between 16 °C and 22 °C. April is the driest month.
- How warm is Rotterdam in summer?
- July and August average highs of 22 °C, with average lows of 15 °C in July and 16 °C in August.
- Which is the rainiest month in Rotterdam?
- October and November, with about 87 mm each. April is the driest at about 40 mm.
- Is Rotterdam cold in winter?
- Highs stay around 6 °C to 8 °C from December to February, and average lows are 3 °C to 4 °C.
- Which airport is closest to Rotterdam?
- Rotterdam The Hague Airport (RTM), about 5 km from the city.
- Where does this weather data come from?
- From NASA POWER, averaged over 2014–2023 for Rotterdam.