The highest day temperature in September 2025 was 114°F. The lowest night temperature was 83°F. The average values for day and night temperatures during September were 109.1°F и 88.6°F respectivly.

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

Precipitation total in September for Riyadh is 0.0 in. It makes september the least rainy month of the year.

The average wind speed in September is 7.5 mph. It makes September one of the most windless months of the year for Riyadh.

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 Riyadh in September is 12.0 hours.