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
Entering September, São Pedro de Alva's average high-temperature reads a still moderately hot 27°C (80.6°F), indicating a close resemblance to the previous month's climate. São Pedro de Alva sees a major change from daytime highs, with the nighttime temperature dipping to a mild 13.6°C (56.5°F) on average during September.Heat index
September's mean heat index is computed to be 28°C (82.4°F). If one remains active during constant exposure, it might cause exhaustion and heat cramps.When considering the heat index, it's pivotal to note it is for shade and mild 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 'real feel' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 65%.Rainfall
In São Pedro de Alva, Portugal, during September, the rain falls for 5.6 days and regularly aggregates up to 23mm (0.91") of precipitation. Throughout the year, there are 119.4 rainfall days, and 525mm (20.67") of precipitation is accumulated.Daylight
The average length of the day in September in São Pedro de Alva is 12h and 27min.On the first day of September in São Pedro de Alva, sunrise is at 07:00 and sunset at 20:04. On the last day of the month, sunrise is at 07:28 and sunset at 19:16 WEST.
Sunshine
In September, the average sunshine is 9.2h.UV index
In São Pedro de Alva, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 5 in September translates into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
What is the usual temperature for São Pedro de Alva in September?
What is the least humid month in São Pedro de Alva?
What is the average humidity in September in São Pedro de Alva?
How much does it rain in São Pedro de Alva in September?
What is the average length of the day in September in São Pedro de Alva?
When is the sunrise / sunset in September in São Pedro de Alva?
How many hours of sunshine does São Pedro de Alva have in September?
What is the UV index reading in September in São Pedro de Alva?
Average temperature in September
São Pedro de Alva, Portugal
- Average high temperature in September: 27°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (12.9°C).
- Average low temperature in September: 13.6°C
The month with the highest average low temperature is July (14.5°C).
The coldest month (with the lowest average low temperature) is January (5.4°C).
Average pressure in September
São Pedro de Alva, Portugal
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
São Pedro de Alva, Portugal
- Average wind speed in September: 7.2km/h
The windiest month (with the highest average wind speed) is March (9km/h).
The calmest month (with the lowest average wind speed) is September (7.2km/h).
Average humidity in September
São Pedro de Alva, Portugal
- Average humidity in September: 65%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are August and September (65%).
Average rainfall in September
São Pedro de Alva, Portugal
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is November (77mm).
The driest month (with the least rainfall) is July (4mm).
Average rainfall days in September
São Pedro de Alva, Portugal
- Average rainfall days in September: 5.6 days
The month with the highest number of rainy days is April (14.7 days).
The month with the least rainy days is August (2.8 days).
Average daylight in September /
Average sunshine in September
São Pedro de Alva, Portugal
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 1min
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 0min).
Average sunshine days in September
São Pedro de Alva, Portugal
- Average sunshine days in September: 23.3 days
The month with the most sunshine days is August (27.5 days).
The months with the least sunshine days are April and November (14.3 days).
Average UV index in September
São Pedro de Alva, 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, March, November and December (UV index 3).
Average cloud cover in September
São Pedro de Alva, Portugal
- Average cloud cover in September: 24
The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 22).
Average visibility in September
São Pedro de Alva, Portugal
- Average visibility in September: 9km
The months with the highest visibility are June, September, October and December (9km).
The months with the lowest visibility are January, February, March, April, May, July, August and November (8km).
São Pedro de Alva, Portugal
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