September weather forecast and climate
Vale de Martinho, Portugal

Weather in September

September, the first month of the autumn, in Vale de Martinho, is also a moderately hot month, with temperature in the range of an average high of 25.7°C (78.3°F) and an average low of 11.3°C (52.3°F).

Temperature

In Vale de Martinho, the average high-temperature marginally drops, from 29.1°C (84.4°F) in August, to a still moderately hot 25.7°C (78.3°F). The average low-temperature, in Vale de Martinho, is 11.3°C (52.3°F).

Humidity

In Vale de Martinho, Portugal, the average relative humidity is 60%.

Rainfall

In Vale de Martinho, during September, the rain falls for 6.3 days and regularly aggregates up to 18mm (0.71") of precipitation. In Vale de Martinho, during the entire year, the rain falls for 127.3 days and collects up to 455mm (17.91") of precipitation.

Snowfall

March through December are months without snowfall in Vale de Martinho.

Daylight

In September, the average length of the day in Vale de Martinho, Portugal, is 12.5h.

Sunshine

In Vale de Martinho, Portugal, the average sunshine in September is 9.4h.

UV index

In Vale de Martinho, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
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. 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 Vale de Martinho?

The average high-temperature, in September, is 25.7°C (78.3°F), while the average low-temperature is 11.3°C (52.3°F).

What is the average humidity in September in Vale de Martinho?

The average relative humidity in September in Vale de Martinho, Portugal, is 60%.

How many days does it rain in September in Vale de Martinho?

In September, in Vale de Martinho, Portugal, the rain falls for 6.3 days. Throughout September, 18mm (0.71") of precipitation is accumulated.

When it does not snow in Vale de Martinho?

In Vale de Martinho snow does not fall in March through December.

What is the average length of the day in September in Vale de Martinho?

In Vale de Martinho, Portugal, the average length of the day in September is 12.5h.

How many hours of sunshine does Vale de Martinho have in September?

The average sunshine in September in Vale de Martinho is 9.4h.

What is the UV index reading in September in Vale de Martinho?

In September, the average daily maximum UV index in Vale de Martinho, Portugal, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in September
Vale de Martinho, Portugal

Average temperature in September - Vale de Martinho, Portugal
  • Average high temperature in September: 25.7°C

The warmest month (with the highest average high temperature) is August (29.1°C).
The month with the lowest average high temperature is January (8.9°C).

  • Average low temperature in September: 11.3°C

Months with the highest average low temperature are July and August (13.1°C).
The coldest month (with the lowest average low temperature) is February (1.5°C).

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Average pressure in September
Vale de Martinho, Portugal

Average pressure in September - Vale de Martinho, Portugal
  • Average pressure in September: 1017.6mbar

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
Vale de Martinho, Portugal

Average wind speed in September - Vale de Martinho, Portugal
  • Average wind speed in September: 6.5km/h

The windiest month (with the highest average wind speed) is March (8.3km/h).
The calmest months (with the lowest average wind speed) are September and October (6.5km/h).

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Average humidity in September
Vale de Martinho, Portugal

Average humidity in September - Vale de Martinho, Portugal
  • Average humidity in September: 60%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (56%).

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Average rainfall in September
Vale de Martinho, Portugal

Average rainfall in September - Vale de Martinho, Portugal
  • Average rainfall in September: 18mm

The wettest month (with the highest rainfall) is December (72mm).
The driest months (with the least rainfall) are July and August (11mm).

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Average rainfall days in September
Vale de Martinho, Portugal

Average rainfall days in September - Vale de Martinho, Portugal
  • Average rainfall days in September: 6.3 days

The month with the highest number of rainy days is April (14.6 days).
The month with the least rainy days is August (3.8 days).

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Average snowfall in September
Vale de Martinho, Portugal

Average snowfall in September - Vale de Martinho, Portugal
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (5mm).
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days in September
Vale de Martinho, Portugal

Average snowfall days in September - Vale de Martinho, Portugal
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.3 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Vale de Martinho, Portugal

Average daylight in September / Average sunshine in September - Vale de Martinho, Portugal
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 9.4h

The month with the most sunshine is July (Average sunshine: 11.5h).
The month with the least sunshine is January (Average sunshine: 4.4h).

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Average sunshine days in September
Vale de Martinho, Portugal

Average sunshine days in September - Vale de Martinho, Portugal
  • Average sunshine days in September: 21.8 days

The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is November (13.5 days).

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Average UV index in September
Vale de Martinho, Portugal

Average UV index in September - Vale de Martinho, Portugal
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Vale de Martinho, Portugal

Average cloud cover in September - Vale de Martinho, Portugal
  • Average cloud cover in September: 23

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in September
Vale de Martinho, Portugal

Average visibility in September - Vale de Martinho, Portugal
  • Average visibility in September: 9km

The month with the highest visibility is August (10km).
The month with the lowest visibility is January (6km).

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