September weather forecast
Umm Lajj, Saudi Arabia

September acts as a turning point in Umm Lajj's annual weather narrative. Nights become visibly longer, indicating the forthcoming of cooler autumn months. Weather conditions begin to stabilize, presenting a noticeable contrast to the intense heat of the past summer. The city sees a significant improvement in residents' comfort level, as drastic temperature swings become a thing of the past. However, the remnants of summer still linger, with a high temperature recorded at 36.6°C (97.9°F).

Temperature

The transition from August to September sees an average high-temperature of a still sweltering 36.6°C (97.9°F), indicating a minor variance from the prior month. During September nights, Umm Lajj witnesses a consistent average temperature of 29.4°C (84.9°F).

Heat index

For September, the heat index is calculated to be a scorching 42°C (107.6°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Umm Lajj, the average relative humidity in September is 45%.

Rainfall

June through September are months without rainfall.

Sea temperature

In Umm Lajj, the average seawater temperature in September is 29.8°C (85.6°F).
Note: Surface water temperatures falling between 25°C (77°F) and 29°C (84.2°F) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

In September, the average length of the day is 12h and 18min.
On the first day of the month, sunrise is at 06:11 and sunset at 18:49. On the last day of September, sunrise is at 06:22 and sunset at 18:18 +03.

Sunshine

The average sunshine in September is 10h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 8 translates into the following recommendations:
Stay protected; otherwise, skin and eyes can suffer rapid damage. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.