September weather forecast
Riyam, Oman

September

Weather in September

The first month of the autumn, September, is still a hot month in Riyam, Oman, with an average temperature fluctuating between 28.7°C (83.7°F) and 34.1°C (93.4°F).

Temperature

The beginning of September records an average high-temperature of a still tropical 34.1°C (93.4°F), marking a negligible difference from August's 34.4°C (93.9°F). Riyam sees an average low-temperature of 28.7°C (83.7°F) during September.

Heat index

In September, the heat index is calculated to be an extremely hot 40°C (104°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. 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 essentially critical for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In Riyam, the average relative humidity in September is 53%.

Rainfall

The only month without rainfall in Riyam is September.

Daylight

In Riyam, the average length of the day in September is 12h and 17min.
On the first day of September, sunrise is at 05:47 and sunset at 18:23. On the last day of the month, sunrise is at 05:57 and sunset at 17:53 +04.

Sunshine

The average sunshine in September in Riyam is 11.7h.

UV index

In September, the average daily maximum UV index is 8. A UV Index estimate of 8 to 10 represents a very high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 8 during September leads to these instructions:
Take the necessary steps to protect yourself; unprotected skin and eyes are vulnerable to damage. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.

Frequently asked questions

How hot is it in Riyam in September?
In Riyam, in September, the average high-temperature is 34.1°C (93.4°F), and the average low-temperature is 28.7°C (83.7°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in September is calculated to be 40°C (104°F).
What is the average humidity in September in Riyam?
In September, the average relative humidity in Riyam, Oman, is 53%.
What is the driest month in Riyam?
The only month without rainfall is September.
Does it rain in Riyam in September?
In September, in Riyam, it doesn't rain. August is the latest month when it rains.
How many hours of daylight does Riyam have in September?
In Riyam, the average day length in September is 12h and 17min.
When are sunrise and sunset in September in Riyam?
On the first day of September in Riyam, sunrise is at 05:47 and sunset at 18:23. On the last day of the month, sunrise is at 05:57 and sunset at 17:53 +04.
How many hours of sunshine does Riyam have in September?
In September, the average sunshine duration in Riyam is 11.7h.
What is the UV index reading in September in Riyam?
The average daily maximum UV index in September is 8. A UV Index reading of 8 to 10 represents a very high health threat from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Riyam, Oman
  • Average high temperature in September: 34.1°C

The warmest month (with the highest average high temperature) is June (36.6°C).
The month with the lowest average high temperature is January (23.4°C).

  • Average low temperature in September: 28.7°C

The month with the highest average low temperature is June (31.5°C).
The coldest month (with the lowest average low temperature) is January (19°C).

Average pressure in September
Riyam, Oman
  • Average pressure in September: 1005.2mbar

The month with the highest atmospheric pressure is January (1017.3mbar).
The month with the lowest atmospheric pressure is July (997.9mbar).

Average wind speed in September
Riyam, Oman
  • Average wind speed in September: 9.5km/h

The windiest months (with the highest average wind speed) are February and May (11.6km/h).
The calmest months (with the lowest average wind speed) are September and October (9.5km/h).

Average humidity in September
Riyam, Oman
  • Average humidity in September: 53%

The month with the highest relative humidity is January (59%).
The month with the lowest relative humidity is May (42%).

Average rainfall in September
Riyam, Oman
  • Average rainfall in September: 0mm

The wettest month (with the highest rainfall) is June (8mm).
The driest month (with the least rainfall) is September (0mm).

Average rainfall days in September
Riyam, Oman
  • Average rainfall days in September: 0 days

The month with the highest number of rainy days is March (3.6 days).
The month with the least rainy days is September (0 days).

Average daylight in September /
Average sunshine in September
Riyam, Oman
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 36min).
The month with the shortest days is December (Average daylight: 10h and 42min).

  • Average sunshine in September: 11h and 4min

The months with the most sunshine are May and August (Average sunshine: 12h and 18min).
The months with the least sunshine are January and December (Average sunshine: 7h and 30min).

Average sunshine days in September
Riyam, Oman
  • Average sunshine days in September: 30 days

The months with the most sunshine days are September and October (30 days).
The month with the least sunshine days is February (26.2 days).

Average UV index in September
Riyam, Oman
  • Average UV index in September: 8

The month with the highest UV index is May (UV index 9).
The months with the lowest UV index are January, February, November and December (UV index 6).

Average cloud cover in September
Riyam, Oman
  • Average cloud cover in September: 2

The month with the most cloud cover is March (Cloud cover 9).
The month with the least cloud cover is September (Cloud cover 2).

Average visibility in September
Riyam, Oman
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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