The highest day temperature in September 2025 was 86°F. The lowest night temperature was 43°F. The average values for day and night temperatures during September were 68.9°F и 55.2°F respectivly.

The average sea surface temperature in September 2025 for Hamburg was 66.4°F. The maximum and minimum values were 61.4°F and 71.0°F respectively.

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

Precipitation total in September for Hamburg is 1.5 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 8.0 mph. It makes September one of the most windless months of the year for Hamburg.

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 Hamburg in September is 6.7 hours.