The highest day temperature in September 2025 was 83°F. The lowest night temperature was 50°F. The average values for day and night temperatures during September were 67.0°F и 57.1°F respectivly.

The average sea surface temperature in September 2025 for Amsterdam was 64.3°F. The maximum and minimum values were 59.2°F and 68.2°F respectively.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for Amsterdam is 2.3 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 9.4 mph. It makes September one of the most windless months of the year for Amsterdam.

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 Amsterdam in September is 6.7 hours.