September weather forecast and climate
Outeiros, Portugal

Weather in September

The first month of the autumn, September, is still a warm month in Outeiros, Portugal, with average temperature varying between 14.5°C (58.1°F) and 28.5°C (83.3°F).

Temperature

In September, the average high-temperature is almost the same as in August - a warm 28.5°C (83.3°F). The average low-temperature, in September, is 14.5°C (58.1°F).

Heat index

The average heat index is calculated to a hot 30.3°C (86.5°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', 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 (differences in body mass, height, and shape, metabolic differences, clothing). 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 especially crucial for babies and toddlers. 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

The average relative humidity in Outeiros, Portugal, is 61%.

Rainfall

In September, in Outeiros, the rain falls for 4.6 days. Throughout September, 17mm (0.67") of precipitation is accumulated. In Outeiros, during the entire year, the rain falls for 94.4 days and collects up to 343mm (13.5") of precipitation.

Daylight

The average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine in Outeiros is 9.2h.

UV index

In Outeiros, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Outeiros?

In Outeiros, Portugal, in September, the average high-temperature is 28.5°C (83.3°F), and the average low-temperature is 14.5°C (58.1°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that factores the actual air temperature with the relative humidity, in September is estimated at 30.3°C (86.5°F).

What is the average humidity in September in Outeiros?

The average relative humidity in September in Outeiros is 61%.

How much does it rain in Outeiros in September?

In September, the rain falls for 4.6 days. Throughout September, 17mm (0.67") of precipitation is accumulated.

How many hours of daylight does Outeiros have in September?

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

How many hours of sunshine does Outeiros have in September?

The average sunshine in September in Outeiros is 9.2h.

How high is the UV index in September in Outeiros?

The average daily maximum UV index in September in Outeiros is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in September
Outeiros, Portugal

Average temperature in September - Outeiros, Portugal
  • Average high temperature in September: 28.5°C

The warmest month (with the highest average high temperature) is August (31.3°C).
The month with the lowest average high temperature is January (13.4°C).

  • Average low temperature in September: 14.5°C

Months with the highest average low temperature are July and August (15.3°C).
The coldest month (with the lowest average low temperature) is January (5.8°C).

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Average pressure in September
Outeiros, Portugal

Average pressure in September - Outeiros, Portugal
  • Average pressure in September: 1016.7mbar

The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).

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Average wind speed in September
Outeiros, Portugal

Average wind speed in September - Outeiros, Portugal
  • Average wind speed in September: 9.7km/h

The windiest month (with the highest average wind speed) is July (12.2km/h).
The calmest month (with the lowest average wind speed) is September (9.7km/h).

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Average humidity in September
Outeiros, Portugal

Average humidity in September - Outeiros, Portugal
  • Average humidity in September: 61%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (60%).

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Average rainfall in September
Outeiros, Portugal

Average rainfall in September - Outeiros, Portugal
  • Average rainfall in September: 17mm

The wettest month (with the highest rainfall) is April (54mm).
The driest month (with the least rainfall) is July (2mm).

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Average rainfall days in September
Outeiros, Portugal

Average rainfall days in September - Outeiros, Portugal
  • Average rainfall days in September: 4.6 days

The month with the highest number of rainy days is April (14.1 days).
The month with the least rainy days is August (2.3 days).

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Average daylight in September /
Average sunshine in September
Outeiros, Portugal

Average daylight in September / Average sunshine in September - Outeiros, 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: 9.4h).

  • Average sunshine in September: 9.2h

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

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Average sunshine days in September
Outeiros, Portugal

Average sunshine days in September - Outeiros, Portugal
  • Average sunshine days in September: 25.2 days

The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is April (14.6 days).

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Average UV index in September
Outeiros, Portugal

Average UV index in September - Outeiros, Portugal
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Outeiros, Portugal

Average cloud cover in September - Outeiros, Portugal
  • Average cloud cover in September: 20

The month with the most cloud cover is January (Cloud cover 45).
Months with the least cloud cover are July and August (Cloud cover 16).

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Average visibility in September
Outeiros, Portugal

Average visibility in September - Outeiros, Portugal
  • Average visibility in September: 9km

Months with the highest visibility are February, March, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January and April (8km).

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