Riyadh
Saudi Arabia
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Riyadh, Saudi Arabia

A view of the Olaya street metro construction and cars in a traffic jam in the city of Riyadh, Saudi Arabia, viewed from above, at night
A view of the Olaya street metro construction and cars in a traffic jam in the city of Riyadh, Saudi Arabia, viewed from above, at night
The last month of the spring, May, is a sweltering month in Riyadh, Saudi Arabia, with average temperature ranging between max 39.4°C (102.9°F) and min 25.9°C (78.6°F).

Temperature

In May, the average high-temperature rises, from a hot 33.4°C (92.1°F) in April, to a torrid 39.4°C (102.9°F). In May, in Riyadh, the average low-temperature is 25.9°C (78.6°F).

Humidity

In Riyadh, the average relative humidity is 17%.

Rainfall

May is the last month it rains in Riyadh. During 3.3 rainfall days, Riyadh aggregates 4.9mm (0.2") of precipitation. In Riyadh, during the entire year, the rain falls for 44.8 days and collects up to 92.5mm (3.6") of precipitation.

Daylight

In Riyadh, the average length of the day in May is 13.3h.

Sunshine

In Riyadh, the average sunshine is 9.3h.

UV index

April through August, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: In May, the average maximum UV index of 12 translate into the following recommendations:
Take all necessary precautions, as unprotected skin can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.

What is the temperature in May in Riyadh?

In May, in Riyadh, the average high-temperature is 39.4°C (102.9°F), and the average low-temperature is 25.9°C (78.6°F).

What is the average humidity in May in Riyadh?

In Riyadh, Saudi Arabia, the average relative humidity in May is 17%.

What is the last month it rains in Riyadh?

May is the last month it rains in Riyadh, Saudi Arabia. During 3.3 rainfall days, in May, Riyadh aggregates 4.9mm (0.2") of precipitation.

How many hours of daylight does Riyadh have in May?

The average length of the day in May in Riyadh is 13.3h.

How long on average sun shines in May in Riyadh?

In May, the average sunshine in Riyadh is 9.3h.

What is the month with the highest UV index in Riyadh?

Months with the highest UV index in Riyadh are April through August, with an average maximum UV index of 12.

What is the UV index reading in May in Riyadh?

In Riyadh, the average daily maximum UV index in May is 12. A UV Index reading of 11, and higher, represents an extreme health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in May - Riyadh, Saudi Arabia
  • Average high temperature in May: 39.4°C

The warmest month (with the highest average high temperature) is August (43.6°C).
The month with the lowest average high temperature is January (20.2°C).

  • Average low temperature in May: 25.9°C

The month with the highest average low temperature is July (29.3°C).
The coldest month (with the lowest average low temperature) is January (9°C).

Average humidity in May - Riyadh, Saudi Arabia
  • Average humidity in May: 17%

Months with the highest relative humidity are January and December (47%).
The month with the lowest relative humidity is July (10%).

Average rainfall in May - Riyadh, Saudi Arabia
  • Average rainfall in May: 4.9mm

The wettest month (with the highest rainfall) is April (23.8mm).
Driest months (with the lowest rainfall) are June, July and September (0mm).

Average rainfall days in May - Riyadh, Saudi Arabia
  • Average rainfall days in May: 3.3 days

The month with the highest number of rainy days is April (11.3 days).
Months with the lowest number of rainy days are June and September (0 days).

Average daylight in May / Average sunshine in May - Riyadh, Saudi Arabia
  • Average daylight in May: 13.3h

The month with the longest days is June (Average daylight: 13.7h).
The month with shortest days is December (Average daylight: 10.6h).

  • Average sunshine in May: 9.3h

The month with most sunshine is June (Average sunshine: 10.9h).
Months with least sunshine are January and December (Average sunshine: 6.9).

Average UV index in May - Riyadh, Saudi Arabia
  • Average UV index in May: 12

Months with the highest UV index are April, May, June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 5).