September weather forecast and climate
São Domingos de Ana Loura, Portugal

Weather in September

September, the first month of the autumn, in São Domingos de Ana Loura, is also a moderately hot month, with temperature in the range of an average high of 29.9°C (85.8°F) and an average low of 16.1°C (61°F).

Temperature

In September, the average high-temperature marginally drops, from a tropical 33.7°C (92.7°F) in August, to a warm 29.9°C (85.8°F). In São Domingos de Ana Loura, Portugal, in September, the average low-temperature is 16.1°C (61°F).

Heat index

In September, the average heat index is evaluated at a hot 31.4°C (88.5°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, metabolic differences, differences in body mass, height, and shape). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In September, the average relative humidity is 53%.

Rainfall

In São Domingos de Ana Loura, during 5.3 rainfall days, 16mm (0.63") of precipitation is typically accumulated. Throughout the year, in São Domingos de Ana Loura, there are 95.8 rainfall days, and 310mm (12.2") of precipitation is accumulated.

Daylight

In São Domingos de Ana Loura, the average length of the day is 12.4h.

Sunshine

In São Domingos de Ana Loura, Portugal, the average sunshine is 9.1h.

UV index

In São Domingos de Ana Loura, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in São Domingos de Ana Loura?

The average high-temperature, in September, is 29.9°C (85.8°F), while the average low-temperature is 16.1°C (61°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that takes the relative humidity and factores it into the air temperature reading, in September is evaluated at 31.4°C (88.5°F).

What is the average humidity in September in São Domingos de Ana Loura?

In São Domingos de Ana Loura, the average relative humidity in September is 53%.

How many days does it rain in September in São Domingos de Ana Loura?

In São Domingos de Ana Loura, Portugal, in September, during 5.3 rainfall days, 16mm (0.63") of precipitation is typically accumulated.

How many hours of daylight does São Domingos de Ana Loura have in September?

In September, the average length of the day is 12.4h.

How long on average sun shines in September in São Domingos de Ana Loura?

In São Domingos de Ana Loura, Portugal, the average sunshine in September is 9.1h.

What is the UV index reading in September in São Domingos de Ana Loura?

In São Domingos de Ana Loura, Portugal, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
São Domingos de Ana Loura, Portugal

Average temperature in September - São Domingos de Ana Loura, Portugal
  • Average high temperature in September: 29.9°C

The warmest month (with the highest average high temperature) is August (33.7°C).
The month with the lowest average high temperature is January (13.7°C).

  • Average low temperature in September: 16.1°C

The month with the highest average low temperature is August (16.9°C).
The coldest month (with the lowest average low temperature) is February (5.2°C).

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Average pressure in September
São Domingos de Ana Loura, Portugal

Average pressure in September - São Domingos de Ana Loura, Portugal
  • Average pressure in September: 1016.4mbar

The month with the highest atmospheric pressure is December (1022.8mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).

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Average wind speed in September
São Domingos de Ana Loura, Portugal

Average wind speed in September - São Domingos de Ana Loura, Portugal
  • Average wind speed in September: 9.7km/h

The windiest months (with the highest average wind speed) are February and March (12km/h).
The calmest month (with the lowest average wind speed) is September (9.7km/h).

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Average humidity in September
São Domingos de Ana Loura, Portugal

Average humidity in September - São Domingos de Ana Loura, Portugal
  • Average humidity in September: 53%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (49%).

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Average rainfall in September
São Domingos de Ana Loura, Portugal

Average rainfall in September - São Domingos de Ana Loura, Portugal
  • Average rainfall in September: 16mm

The wettest month (with the highest rainfall) is April (52mm).
The driest month (with the least rainfall) is July (2mm).

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Average rainfall days in September
São Domingos de Ana Loura, Portugal

Average rainfall days in September - São Domingos de Ana Loura, Portugal
  • Average rainfall days in September: 5.3 days

The month with the highest number of rainy days is March (13.8 days).
The month with the least rainy days is August (2 days).

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Average daylight in September /
Average sunshine in September
São Domingos de Ana Loura, Portugal

Average daylight in September / Average sunshine in September - São Domingos de Ana Loura, Portugal
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 9.1h

Months with the most sunshine are July and August (Average sunshine: 11.4h).
The month with the least sunshine is January (Average sunshine: 5h).

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Average sunshine days in September
São Domingos de Ana Loura, Portugal

Average sunshine days in September - São Domingos de Ana Loura, Portugal
  • Average sunshine days in September: 23.4 days

The month with the most sunshine days is July (28.8 days).
The month with the least sunshine days is April (15.3 days).

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Average UV index in September
São Domingos de Ana Loura, Portugal

Average UV index in September - São Domingos de Ana Loura, Portugal
  • Average UV index in September: 6

The month with the highest UV index is August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
São Domingos de Ana Loura, Portugal

Average cloud cover in September - São Domingos de Ana Loura, Portugal
  • Average cloud cover in September: 20

The month with the most cloud cover is January (Cloud cover 44).
Months with the least cloud cover are July and August (Cloud cover 11).

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Average visibility in September
São Domingos de Ana Loura, Portugal

Average visibility in September - São Domingos de Ana Loura, Portugal
  • Average visibility in September: 10km

Months with the highest visibility are June, July, August and September (10km).
Months with the lowest visibility are January and April (8km).

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