September weather forecast
Riyadh, Saudi Arabia

September brings relief to Riyadh with the decrease in temperature to a high of 40.4°C (104.7°F), signifying the beginning of a gradual transition to autumn. The city experiences a slight cool down, transforming the overly hot summer landscape into milder surroundings. As the intensity of the UV index declines to 11, sunlight takes a softer tone. Rainfall remains scarce, with zero registered instances providing a continuation of the dry theme. This month unfolds as the bridge between the harsh summer and the forthcoming gentler winter.

Temperature

September's onset in Riyadh, Saudi Arabia, corresponds with a subtle shift in the average high-temperature, slightly moving from 43.6°C (110.5°F) in August to a still extremely hot 40.4°C (104.7°F). With the onset of night in September, Riyadh reveals a significant decrease in temperature, averaging at a moderately hot 25.9°C (78.6°F).

Humidity

The average relative humidity in September is 14%.

Rainfall

In Riyadh, rain does not fall in June, July and September.

Daylight

The average length of the day in September is 12h and 17min.
On the first day of September in Riyadh, Saudi Arabia, sunrise is at 05:34 and sunset at 18:11. On the last day of the month, sunrise is at 05:45 and sunset at 17:41 +03.

Sunshine

In September, the average sunshine in Riyadh is 9.1h.

UV index

The average daily maximum UV index in September is 11. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 11 in September transforms into the following instructions:
Undertake every vital safety procedure, as unprotected skin and eyes could sustain burns in no time. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Sunscreen with a sun protection factor of no less than 30 should be used liberally and reapplied frequently on overcast days, including after every swim or outdoor activity.