May weather forecast
Jeddah, Saudi Arabia

The sweltering heat of Jeddah truly commences in May, establishing the onset of the summer season. With temperatures soaring to a stifling 37.2°C (99°F), outdoor activities may need to be limited to the cooler parts of the day. The sea, however, makes up for the scorching weather, offering warmer and pleasing temperatures perfect for various water activities. As May bids farewell, the city fastens its seatbelt for the hottest summer months of June and July.

Temperature

With May's arrival, Jeddah notes an average high-temperature of a fiery hot 37.2°C (99°F), closely following the trend of the preceding month. A noteworthy temperature dip to a moderately hot 24°C (75.2°F) is observed during the nights of May.

Heat index

May's heat index is estimated at a life-threatening hot 50°C (122°F). Stay wary: Heat exhaustion and heat cramps are possible. Heatstroke can ensue from extended effort.
Always consider that heat index estimations are for light winds and places in the shade. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In Jeddah, the average relative humidity in May is 56%.

Rainfall

May is the last month it rains in Jeddah. Throughout May, Jeddah collects 0mm (0") of precipitation. Throughout the year, in Jeddah, 61mm (2.4") of rain is accumulated.

Sea temperature

In May, the average sea temperature is 28.2°C (82.8°F).
Note: In any water activity, temperatures between 25°C (77°F) and 29°C (84.2°F) are viewed as magnificent and exceptionally pleasant for prolonged enjoyment.

Daylight

In Jeddah, the average length of the day in May is 13h and 9min.
On the first day of May in Jeddah, sunrise is at 05:51 and sunset at 18:48. On the last day of the month, sunrise is at 05:40 and sunset at 19:01 +03.

Sunshine

May and June, with an average of 11h of sunshine, are months with the most sunshine.

UV index

April through September, with an average maximum UV index of 12, are months with the highest UV index in Jeddah. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In May, a daily UV index of 12 turns into the following recommendations:
Take all critical precautions, unprotected skin might burn swiftly. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Use liberally and reapply a broad-spectrum sunscreen with at least SPF 30 every two hours and right after outdoor activities or a swim. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.