Rotterdam
September
Weather in Rotterdam for September 2026
Your guide to Rotterdam weather in September - trends and predictions
In general, the average temperature in Rotterdam at the beginning of September is 24.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.7 °C by the end of September.
Rotterdam experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 88.6 mm.
Temperatures
Rain 🌧️
4
Dry days
26
Rainy days
0
Snow days
21°/13°
Temperatures
20 km/h
Avg max wind
70 %
Avg humidity
Rotterdam Weather September
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Temperatures trend during September in Rotterdam
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September weather in Rotterdam day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 24° /14° | 1.8 mm | 5 | |
| 2 Sept. |  Fog | 24° /16° | 3.5 mm | 5 | |
| 3 Sept. |  Partly cloudy | 24° /15° | 1.8 mm | 5 | |
| 4 Sept. | Light rain shower | 22° /14° | 1.1 mm | 5 | |
| 5 Sept. |  Sunny | 26° /14° | 0.4 mm | 6 | |
| 6 Sept. | Sunny | 26° /15° | 2.9 mm | 6 | |
| 7 Sept. | Sunny | 28° /15° | 0 mm | 7 | |
| 8 Sept. | Patchy rain possible | 25° /15° | 1.9 mm | 6 | |
| 9 Sept. |  Cloudy | 22° /15° | 2.4 mm | 5 | |
| 10 Sept. | Sunny | 24° /14° | 2.5 mm | 6 | |
| 11 Sept. | Light rain shower | 20° /14° | 6.3 mm | 4 | |
| 12 Sept. | Partly cloudy | 18° /12° | 10 mm | 4 | |
| 13 Sept. | Light rain shower | 17° /10° | 3.8 mm | 4 | |
| 14 Sept. | Patchy rain possible | 19° /11° | 1 mm | 5 | |
| 15 Sept. | Partly cloudy | 21° /12° | 1.7 mm | 5 | |
| 16 Sept. | Partly cloudy | 20° /13° | 1.5 mm | 5 | |
| 17 Sept. |  Overcast | 20° /14° | 1.3 mm | 5 | |
| 18 Sept. | Light rain shower | 22° /15° | 3.2 mm | 5 | |
| 19 Sept. | Patchy rain possible | 23° /14° | 1.2 mm | 5 | |
| 20 Sept. | Patchy rain possible | 23° /14° | 1.9 mm | 5 | |
| 21 Sept. | Light rain shower | 20° /12° | 5 mm | 5 | |
| 22 Sept. | Patchy rain possible | 18° /11° | 3.3 mm | 4 | |
| 23 Sept. | Light rain shower | 17° /11° | 5.4 mm | 4 | |
| 24 Sept. | Sunny | 17° /9° | 0.6 mm | 4 | |
| 25 Sept. | Overcast | 17° /10° | 2.7 mm | 4 | |
| 26 Sept. | Overcast | 19° /12° | 6.9 mm | 4 | |
| 27 Sept. | Partly cloudy | 19° /12° | 9 mm | 4 | |
| 28 Sept. | Patchy rain possible | 17° /11° | 1.3 mm | 4 | |
| 29 Sept. | Light rain shower | 18° /11° | 0.3 mm | 4 | |
| 30 Sept. | Cloudy | 17° /10° | 4.1 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Rotterdam in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Rotterdam forecast closer to your planned date for the most up-to-date weather information.
Change Month
Rotterdam in September - FAQ
What are the expected maximum and minimum temperatures in Rotterdam during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Rotterdam during September?
Moderate rainfall is anticipated in Rotterdam during September, with a total of 88.6 mm spread over approximately 26 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Rotterdam during September?
The average wind speed in Rotterdam during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Rotterdam
Explore the daily rainfall trends and prepare for Rotterdams September weather 💧
Typically, Rotterdam has 26 rainy days in September with a total of 88.6 mm of rainfall.
UV exposure in Rotterdam during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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