Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The average high-temperature during September registers at a moderately hot 28.6°C (83.5°F), maintaining a close resemblance to the previous month. September's nights exhibit a sharp contrast from day highs, with an average temperature of 15.2°C (59.4°F).Heat index
The heat index value for September is evaluated at a tropical 31°C (87.8°F). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.Know that the heat index computations account for shaded terrains and slight winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. 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 of high significance for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
The average relative humidity in September is 63%.Rainfall
In Alfange, in September, it is raining for 5.7 days, with typically 19mm (0.75") of accumulated precipitation. In Alfange, during the entire year, the rain falls for 108.1 days and collects up to 337mm (13.27") of precipitation.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 07:03 and sunset at 20:05. On the last day of September, sunrise is at 07:30 and sunset at 19:18 WEST.
Sunshine
In September, the average sunshine in Alfange is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
How hot is it in Alfange in September?
What is the average humidity in September in Alfange?
How many days does it rain in September in Alfange?
What is the average length of the day in September in Alfange?
When are sunrise and sunset in September in Alfange?
How many hours of sunshine does Alfange have in September?
What is the UV index intensity in September in Alfange?
Average temperature in September
Alfange, Portugal
- Average high temperature in September: 28.6°C
The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (14°C).
- Average low temperature in September: 15.2°C
The month with the highest average low temperature is July (15.8°C).
The coldest months (with the lowest average low temperature) are January and February (6.8°C).
Average pressure in September
Alfange, Portugal
- Average pressure in September: 1016.7mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).
Average wind speed in September
Alfange, Portugal
- Average wind speed in September: 10.6km/h
The windiest month (with the highest average wind speed) is July (13.2km/h).
The calmest months (with the lowest average wind speed) are September and October (10.6km/h).
Average humidity in September
Alfange, Portugal
- Average humidity in September: 63%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (62%).
Average rainfall in September
Alfange, Portugal
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is November (53mm).
The driest months (with the least rainfall) are July and August (3mm).
Average rainfall days in September
Alfange, Portugal
- Average rainfall days in September: 5.7 days
The month with the highest number of rainy days is November (13.9 days).
The month with the least rainy days is August (2.4 days).
Average daylight in September /
Average sunshine in September
Alfange, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Alfange, Portugal
- Average sunshine days in September: 23.3 days
The month with the most sunshine days is July (27.3 days).
The months with the least sunshine days are April and November (14.6 days).
Average UV index in September
Alfange, Portugal
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Alfange, Portugal
- Average cloud cover in September: 21
The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Alfange, Portugal
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
Alfange, Portugal
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