September weather forecastAr Riyad, Egypt
September
Weather in September
September, the first month of the autumn in Ar Riyad, is still a torrid month, with temperature in the range of an average high of 35.3°C (95.5°F) and an average low of 19.8°C (67.6°F).Temperature
Ar Riyad, Egypt, experiences an average high-temperature of a still sweltering 35.3°C (95.5°F) in September, subtly different from August's 37.7°C (99.9°F). Ar Riyad, amidst the high September temperatures, experiences a substantial shift to an average nighttime low of 19.8°C (67.6°F).Heat index
The heat index value for September is computed to be a blazing hot 46°C (114.8°F). Remain cautious: Heat cramps along with heat exhaustion are foreseeable. Ongoing activity may precipitate heatstroke.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. 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. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
In Ar Riyad, Egypt, the average relative humidity in September is 61%.Rainfall
April through September are months without rainfall.Daylight
In September, the average length of the day is 12h and 21min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:41 pm EEST.
Sunshine
The average sunshine in September is 11.1h.UV index
In Ar Riyad, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 7 in September transforms into this advice:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ar Riyad, Egypt
- Average high temperature in September: 35.3°C
The warmest month (with the highest average high temperature) is July (37.8°C).
The month with the lowest average high temperature is January (19.8°C).
- Average low temperature in September: 19.8°C
The months with the highest average low temperature are July and August (20.8°C).
The coldest month (with the lowest average low temperature) is January (8.4°C).
Average pressure in September
Ar Riyad, Egypt
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is December (1018.8mbar).
The month with the lowest atmospheric pressure is July (1007.8mbar).
Average wind speed in September
Ar Riyad, Egypt
- Average wind speed in September: 9.1km/h
The windiest months (with the highest average wind speed) are March and May (10.1km/h).
The calmest month (with the lowest average wind speed) is November (8.1km/h).
Average humidity in September
Ar Riyad, Egypt
- Average humidity in September: 61%
The month with the highest relative humidity is December (64%).
The month with the lowest relative humidity is May (47%).
Average rainfall in September
Ar Riyad, Egypt
- Average rainfall in September: 0mm
The wettest month (with the highest rainfall) is March (6mm).
The driest months (with the least rainfall) are April, May, June, July, August and September (0mm).
Average rainfall days in September
Ar Riyad, Egypt
- Average rainfall days in September: 0.1 days
The month with the highest number of rainy days is February (3.3 days).
The months with the least rainy days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ar Riyad, Egypt
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 11h and 6min
The month with the most sunshine is August (Average sunshine: 12h and 30min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days in September
Ar Riyad, Egypt
- Average sunshine days in September: 29.8 days
The months with the most sunshine days are July and August (31 days).
The month with the least sunshine days is February (24 days).
Average UV index in September
Ar Riyad, Egypt
- Average UV index in September: 7
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January, February and December (UV index 4).
Average cloud cover in September
Ar Riyad, Egypt
- Average cloud cover in September: 8
The month with the most cloud cover is January (Cloud cover 25).
The months with the least cloud cover are June and July (Cloud cover 5).
Average visibility in September
Ar Riyad, Egypt
- Average visibility in September: 9km
The months with the highest visibility are May, June, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, July, August and September (9km).
