Rotterdam Weather: September
 |
Average Day Temperature: | 68.2°F |
|
Average Night Temperature: | 58.1°F |
|
Sea Water Temperature: | 66.4°F |
|
Number of Sunny Days: | 9 days |
| Sunshine Hours: | 11.7 - 13.6 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.7 in | |
| detailed information | ||
forecast
| Rotterdam |
Temperature
| Rotterdam |
Air Temperature in September, °F
The highest day temperature in September 2025 was 87°F. The lowest night temperature was 49°F. The average values for day and night temperatures during September were 68.2°F и 57.0°F respectivly.
Rotterdam Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Rotterdam was 66.1°F. The maximum and minimum values were 61.8°F and 69.2°F respectively.
You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Rotterdam is 1.7 in.
The average wind speed in September is 9.1 mph. It makes September the most windless month of the year for Rotterdam.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Rotterdam in September is 6.8 hours.
Rotterdam on the Weather Map
| Amsterdam |  |
+36 |
| Aruba |  |
+84 |
| Breda | |
+36 |
| Eindhoven | |
+36 |
| Groningen | |
+40 |
| Hague | |
+40 |
| Maastricht |  |
+38 |
| Rotterdam | |
+36 |
| Utrecht | |
+36 |
| 1200 |  |
42°F | N 7 mph |
| 1500 | |
44°F | N 8 mph |
| 1800 |  |
40°F | N 9 mph |
| 2100 | |
40°F | N 14 mph |
| 0000 |  |
40°F | N 17 mph |
| 0300 | |
42°F | N 19 mph |
| 0600 | |
44°F | N 17 mph |
| 0900 | |
46°F | N 17 mph |