September weather forecast
Seville, Spain

September swoops in, marking a decline in the previously stifling temperatures of August. Seville sees a gradual decrease in temperatures, setting the stage for transitioning into autumn. While still moderately warm, September's air is infused with a slight chill as the month progresses. Audible again is the patter of rain, with precipitation levels rising to 27mm (1.06"), after a two-month lull. The UV index correspondingly notes a decline, reflective of the receding strength of the sun's rays.

Temperature

The onset of September in Seville results in a small decrease in the average high-temperature, moderately receding from a fiery hot 35.5°C (95.9°F) in August to a hot 31.7°C (89.1°F). The significant decline in Seville's temperature, from day to night, averages of 18.2°C (64.8°F) in September.

Heat index

For September, the heat index is calculated to be a fiery hot 35°C (95°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Understanding the heat index involves considering values for shaded locales with light wind. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for 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.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In September, the average relative humidity is 54%.

Rainfall

In Seville, Spain, in September, it is raining for 2.4 days, with typically 27mm (1.06") of accumulated precipitation. In Seville, Spain, during the entire year, the rain falls for 50.4 days and collects up to 539mm (21.22") of precipitation.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of September in Seville, sunrise is at 07:54 and sunset at 20:52. On the last day of the month, sunrise is at 08:18 and sunset at 20:08 CEST.

Sunshine

In Seville, the average sunshine in September is 8.1h.

UV index

In September, the average daily maximum UV index in Seville is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: During September, 7 as the daily maximum UV index converts into the following advice:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.