September weather forecast and climate
Roxo, Portugal

Weather in September

The first month of the autumn, September, is also a moderately hot month in Roxo, Portugal, with temperature in the range of an average high of 27°C (80.6°F) and an average low of 13.6°C (56.5°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still warm 27°C (80.6°F). In September, in Roxo, the average low-temperature is 13.6°C (56.5°F).

Heat index

In September, the average heat index is evaluated at 28.5°C (83.3°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', 'felt air temperature', 'real feel', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index 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

Months with the lowest humidity in Roxo are August and September, with an average relative humidity of 65%.

Rainfall

In September, the rain falls for 5.6 days. Throughout September, 23mm (0.91") of precipitation is accumulated. Throughout the year, there are 119.4 rainfall days, and 525mm (20.67") of precipitation is accumulated.

Daylight

The average length of the day is 12.4h.

Sunshine

In September, the average sunshine is 9.2h.

UV index

In Roxo, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Roxo?

In September, in Roxo, Portugal, the average high-temperature is 27°C (80.6°F), and the average low-temperature is 13.6°C (56.5°F). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), that factores the actual air temperature with the relative humidity, is appraised at 28.5°C (83.3°F).

What are the least humid months in Roxo?

August and September, with an average relative humidity of 65%, are the least humid months in Roxo.

What is the average humidity in September in Roxo?

In Roxo, the average relative humidity in September is 65%.

How much does it rain in Roxo in September?

In September, in Roxo, Portugal, the rain falls for 5.6 days. Throughout September, 23mm (0.91") of precipitation is accumulated.

What is the average length of the day in September in Roxo?

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

How many hours of sunshine does Roxo have in September?

In September, the average sunshine is 9.2h.

What is the UV index reading in September in Roxo?

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

Average temperature in September
Roxo, Portugal

Average temperature in September - Roxo, 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).

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Average pressure in September
Roxo, Portugal

Average pressure in September - Roxo, 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).

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Average wind speed in September
Roxo, Portugal

Average wind speed in September - Roxo, 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).

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Average humidity in September
Roxo, Portugal

Average humidity in September - Roxo, Portugal
  • Average humidity in September: 65%

The month with the highest relative humidity is January (84%).
Months with the lowest relative humidity are August and September (65%).

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Average rainfall in September
Roxo, Portugal

Average rainfall in September - Roxo, 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).

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Average rainfall days in September
Roxo, Portugal

Average rainfall days in September - Roxo, 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).

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

Average daylight in September / Average sunshine in September - Roxo, Portugal
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
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: 11.2h).
The month with the least sunshine is January (Average sunshine: 5h).

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Average sunshine days in September
Roxo, Portugal

Average sunshine days in September - Roxo, Portugal
  • Average sunshine days in September: 23.3 days

The month with the most sunshine days is August (27.5 days).
Months with the least sunshine days are April and November (14.3 days).

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Average UV index in September
Roxo, Portugal

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

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

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Average cloud cover in September
Roxo, Portugal

Average cloud cover in September - Roxo, Portugal
  • Average cloud cover in September: 24

The month with the most cloud cover is January (Cloud cover 48).
Months with the least cloud cover are July and August (Cloud cover 22).

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Average visibility in September
Roxo, Portugal

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

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

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