Rotterdam Weather in September
18.6°C high · 10.6°C low · 85 mm rain · 4.7h sun
Sep is a warm month in Rotterdam — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 18.6°C |
| Average low | 10.6°C |
| Rainfall | 85 mm |
| Sunshine | 4.7 hours/day |
| Daylight | 12.4 hours |
What to pack in September
Pack a jacket and layers for Rotterdam in September.
Rotterdam weather by month
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Frequently asked questions
What is the weather in Rotterdam in September?
Highs of 18.6°C and lows of 10.6°C, with about 85 mm of rain and 4.7 hours of sunshine per day.
Is September a good time to visit Rotterdam?
Sep is a warm month in Rotterdam — not peak season, but a good time to avoid crowds.
What to do in Rotterdam · Best time to visit Rotterdam
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.