September weather forecast and climate
Sintrão, Portugal

Weather in September

September, the first month of the autumn, in Sintrão, is also a moderately hot month, with temperature in the range of an average high of 25.3°C (77.5°F) and an average low of 12.4°C (54.3°F).

Temperature

In September, the average high-temperature slightly decreases, from a warm 29.2°C (84.6°F) in August, to a still moderately hot 25.3°C (77.5°F). In Sintrão, the average low-temperature is 12.4°C (54.3°F).

Humidity

The average relative humidity in Sintrão, Portugal, is 55%.

Rainfall

In Sintrão, in September, it is raining for 5.9 days, with typically 19mm (0.75") of accumulated precipitation. In Sintrão, during the entire year, the rain falls for 113.4 days and collects up to 421mm (16.57") of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In Sintrão, Portugal, the average length of the day is 12.5h.

Sunshine

The average sunshine is 9.5h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. 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 Sintrão?

The average high-temperature, in September, is 25.3°C (77.5°F), while the average low-temperature is 12.4°C (54.3°F).

What is the average humidity in September in Sintrão?

In September, the average relative humidity is 55%.

How much does it rain in Sintrão in September?

In Sintrão, Portugal, during September, the rain falls for 5.9 days and regularly aggregates up to 19mm (0.75") of precipitation.

When it does not snow in Sintrão?

May through October are months without snowfall.

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

The average length of the day in September in Sintrão is 12.5h.

How long on average sun shines in September in Sintrão?

The average sunshine in September is 9.5h.

How high is the UV index in September in Sintrão?

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

Average temperature in September
Sintrão, Portugal

Average temperature in September - Sintrão, Portugal
  • Average high temperature in September: 25.3°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 (8.7°C).

  • Average low temperature in September: 12.4°C

The month with the highest average low temperature is July (14.2°C).
The coldest month (with the lowest average low temperature) is February (1.8°C).

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Average pressure in September
Sintrão, Portugal

Average pressure in September - Sintrão, Portugal
  • Average pressure in September: 1016.8mbar

The month with the highest atmospheric pressure is December (1023.1mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).

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Average wind speed in September
Sintrão, Portugal

Average wind speed in September - Sintrão, Portugal
  • Average wind speed in September: 9.1km/h

The windiest month (with the highest average wind speed) is February (12.7km/h).
The calmest month (with the lowest average wind speed) is September (9.1km/h).

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Average humidity in September
Sintrão, Portugal

Average humidity in September - Sintrão, Portugal
  • Average humidity in September: 55%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in September
Sintrão, Portugal

Average rainfall in September - Sintrão, Portugal
  • Average rainfall in September: 19mm

The wettest month (with the highest rainfall) is December (65mm).
The driest month (with the least rainfall) is August (6mm).

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Average rainfall days in September
Sintrão, Portugal

Average rainfall days in September - Sintrão, Portugal
  • Average rainfall days in September: 5.9 days

The month with the highest number of rainy days is April (16.2 days).
The month with the least rainy days is August (2.7 days).

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Average snowfall in September
Sintrão, Portugal

Average snowfall in September - Sintrão, Portugal
  • Average snowfall in September: 0mm

Months with the highest snowfall are January and February (44mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in September
Sintrão, Portugal

Average snowfall days in September - Sintrão, Portugal
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.9 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Sintrão, Portugal
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 9.5h

Months with the most sunshine are July and August (Average sunshine: 11.6h).
The month with the least sunshine is January (Average sunshine: 4.3h).

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Average sunshine days in September
Sintrão, Portugal

Average sunshine days in September - Sintrão, Portugal
  • Average sunshine days in September: 22.7 days

The month with the most sunshine days is August (27.1 days).
The month with the least sunshine days is April (12.5 days).

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Average UV index in September
Sintrão, Portugal

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

Months with the highest UV index are July and August (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
Sintrão, Portugal

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

The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 12).

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Average visibility in September
Sintrão, Portugal

Average visibility in September - Sintrão, Portugal
  • Average visibility in September: 10km

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

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