The highest day temperature in September 2025 was 109°F. The lowest night temperature was 86°F. The average values for day and night temperatures during September were 103.4°F и 92.5°F respectivly.

The average sea surface temperature in September 2025 for Dammam was 95.2°F. The maximum and minimum values were 89.6°F and 98.4°F respectively.

Almost all days in September are sunny. There is very low probability of clouds or gloomy days.

Precipitation total in September for Dammam is 0.0 in. This value is relatively stable throughout the year.

The average wind speed in September is 10.1 mph. It makes September one of the most windless months of the year for Dammam.

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 Dammam in September is 12.3 hours.