The highest day temperature in September 2025 was 87°F. The lowest night temperature was 54°F. The average values for day and night temperatures during September were 72.2°F и 66.9°F respectivly.

The average sea surface temperature in September 2025 for Derbent was 76.2°F. The maximum and minimum values were 70.2°F and 80.8°F respectively.

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation total in September for Derbent is 0.9 in.

The average wind speed in September is 7.9 mph. This value is relatively stable throughout the year.

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 Derbent in September is 8.7 hours.