September weather forecast
Muscat, Oman

September sees the onset of autumn, bringing about a respite from the prolonged summer. The slight cooling trend continues with temperatures further dipping to an agreeable 36.3°C (97.3°F), making Muscat's weather more manageable. The dry spell continues with complete avoidance of rainfall, maintaining the arid climate of the area. However, the reduction in harsh sunlight and a dip in the UV index are clear indications of the forthcoming cooler months. The trend of descending temperatures sets the stage for a gradual decrease in the intensity of heat in October.

Temperature

Muscat's average high-temperature in September is a still sweltering 36.3°C (97.3°F), marking an insignificant difference from the 36.2°C (97.2°F) of August. During September, Muscat consistently records a temperature low averaging a moderately hot 27.5°C (81.5°F).

Heat index

September's heat index is appraised at a life-threatening hot 51°C (123.8°F). Guard: Heat exhaustion and heat cramps are foreseeable. Prolonged effort may bring about heatstroke.
Note that heat index values are valued for light wind and location in the shade. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In September, the average relative humidity in Muscat, Oman, is 63%.

Rainfall

The only month without rainfall in Muscat, Oman, is September.

Sea temperature

In September, the average sea temperature in Muscat is 30.3°C (86.5°F).
Note: The desire for a refreshing swim might be compromised in waters with temperatures above 30°C (86°F).

Daylight

The average length of the day in September in Muscat is 12h and 17min.
On the first day of September in Muscat, sunrise is at 05:48 and sunset at 18:24. On the last day of the month, sunrise is at 05:57 and sunset at 17:54 +04.

Sunshine

The average sunshine in September is 10.1h.

UV index

The average daily maximum UV index in September is 11. A UV Index reading of 11, and higher, represents an extreme threat to health from unsafe exposure to UV radiation for the average person.
Note: In September, the UV index of 11 transforms into the following advice:
Adopt every vital precaution, unprotected skin and eyes may burn rapidly. 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 sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Even if it's cloudy, generously apply and frequently reapply a sunscreen with no less than a 30 sun protection factor after each swim or outdoor exercise. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.