Muscat
Oman
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Muscat, Oman

A beautiful park outside the Grand Mosque Muscat, in Oman
A beautiful park outside the Grand Mosque Muscat, in Oman
The first month of the autumn, September, is also a sweltering month in Muscat, Oman, with average temperature ranging between max 36.3°C (97.3°F) and min 27.5°C (81.5°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still very hot 36.3°C (97.3°F). In Muscat, the average low-temperature is 27.5°C (81.5°F).

Heat index

In September, the average heat index is evaluated at a burning hot 50.9°C (123.6°F). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, differences in body mass, height, and shape, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

The average relative humidity in September is 63%.

Rainfall

September is the only month when rain does not fall.

Sea temperature

In Muscat, in September, the average water temperature is 30.3°C (86.5°F).
Note: The water temperature above 30°C (86°F) is arguably regarded as unpleasant. The primary purpose of entering the water - cooling down from sunshine and high temperatures - is lost.

Daylight

In September, the average length of the day in Muscat, Oman, is 12.3h.

Sunshine

In Muscat, the average sunshine is 10.1h.

UV index

In September, the average daily maximum UV index is 11. A UV Index of 11, and more, symbolizes an extreme health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 11 in September interpret into the following advice:
Practice all-important precautions. Light skin people may get burned in less than 5 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Muscat?

In Muscat, Oman, in September, the average high-temperature is 36.3°C (97.3°F), and the average low-temperature is 27.5°C (81.5°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), that takes the relative humidity and factores it into the air temperature reading, in September is calculated to 50.9°C (123.6°F).

What is the average humidity in September in Muscat?

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

Does it rain in Muscat in September?

In September, in Muscat, Oman, it doesn't rain. August is the latest month when it rains.

What is the driest month in Muscat?

The only month without rainfall in Muscat is September.

What is the sea temperature in September in Muscat?

In Muscat, Oman, in September, the average water temperature is 30.3°C (86.5°F). For swimming, other intense water activities, temperature above 30°C (86°F) is arguably unpleasant, as the water cooling effect is missing.

How many hours of daylight does Muscat have in September?

In September, the average length of the day in Muscat is 12.3h.

How long on average sun shines in September in Muscat?

In September, the average sunshine in Muscat, Oman, is 10.1h.

What is the UV index intensity in September in Muscat?

In September, the average daily maximum UV index is 11. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Muscat, Oman
  • Average high temperature in September: 36.3°C

The warmest month (with the highest average high temperature) is June (40.4°C).
The month with the lowest average high temperature is January (25.5°C).

  • Average low temperature in September: 27.5°C

The month with the highest average low temperature is June (30.6°C).
The coldest month (with the lowest average low temperature) is January (17.3°C).

Average humidity in September - Muscat, Oman
  • Average humidity in September: 63%

The month with the highest relative humidity is August (67%).
The month with the lowest relative humidity is May (42%).

Average rainfall in September - Muscat, Oman
  • Average rainfall in September: 0mm

The wettest month (with the highest rainfall) is February (24.5mm).
The driest month (with the lowest rainfall) is September (0mm).

Average rainfall days in September - Muscat, Oman
  • Average rainfall days in September: 0 days

The month with the highest number of rainy days is February (3 days).
Months with the lowest number of rainy days are May, June, July, September, October and November (0 days).

Average sea temperature in September - Muscat, Oman
  • Average sea temperature in September: 30.3°C

The best month for swimming (with the highest average sea temperature) is June (31.6°C).
The coldest month (with the lowest average sea temperature) is February (23.3°C).

Average daylight in September / Average sunshine in September - Muscat, Oman
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.6h).
The month with shortest days is December (Average daylight: 10.7h).

  • Average sunshine in September: 10.1h

The month with most sunshine is May (Average sunshine: 11.2h).
The month with least sunshine is December (Average sunshine: 8.6h).

Average UV index in September - Muscat, Oman
  • Average UV index in September: 11

Months with the highest UV index are April, May, June, July and August (UV index 12).
Months with the lowest UV index are January and December (UV index 6).