September weather forecast and climate
Samuel, Portugal

Weather in September

The first month of the autumn, September, is still a warm month in Samuel, Portugal, with average temperature fluctuating between 16.3°C (61.3°F) and 23°C (73.4°F).

Temperature

In September, the average high-temperature is almost the same as in August - a still moderately hot 23°C (73.4°F). In Samuel, in September, the average low-temperature is 16.3°C (61.3°F).

Humidity

Months with the lowest humidity in Samuel are September and October, with an average relative humidity of 74%.

Rainfall

In Samuel, in September, during 6.2 rainfall days, 25mm (0.98") of precipitation is typically accumulated. Throughout the year, there are 130.4 rainfall days, and 585mm (23.03") of precipitation is accumulated.

Daylight

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

Sunshine

In Samuel, the average sunshine is 9.3h.

UV index

Months with the highest UV index are May through September, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. 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 Samuel?

In Samuel, Portugal, in September, the average high-temperature is 23°C (73.4°F), and the average low-temperature is 16.3°C (61.3°F).

What are the least humid months in Samuel?

Months with the lowest humidity are September and October, with an average relative humidity of 74%.

What is the average humidity in September in Samuel?

In September, the average relative humidity in Samuel, Portugal, is 74%.

How many days does it rain in September in Samuel?

In Samuel, in September, it is raining for 6.2 days, with typically 25mm (0.98") of accumulated precipitation.

How many hours of daylight does Samuel have in September?

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

How long on average sun shines in September in Samuel?

The average sunshine in September is 9.3h.

What are the months with the highest UV index in Samuel?

May through September, with an average maximum UV index of 5, are months with the highest UV index in Samuel.

How high is the UV index in September in Samuel?

In Samuel, Portugal, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Samuel, Portugal

Average temperature in September - Samuel, Portugal
  • Average high temperature in September: 23°C

The warmest month (with the highest average high temperature) is August (23.4°C).
The month with the lowest average high temperature is January (13.7°C).

  • Average low temperature in September: 16.3°C

Months with the highest average low temperature are July and August (16.8°C).
The coldest month (with the lowest average low temperature) is February (9.3°C).

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Average pressure in September
Samuel, Portugal

Average pressure in September - Samuel, Portugal
  • Average pressure in September: 1017mbar

The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).

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Average wind speed in September
Samuel, Portugal

Average wind speed in September - Samuel, Portugal
  • Average wind speed in September: 12.8km/h

The windiest month (with the highest average wind speed) is February (17.2km/h).
The calmest month (with the lowest average wind speed) is September (12.8km/h).

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Average humidity in September
Samuel, Portugal

Average humidity in September - Samuel, Portugal
  • Average humidity in September: 74%

The month with the highest relative humidity is January (78%).
Months with the lowest relative humidity are September and October (74%).

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Average rainfall in September
Samuel, Portugal

Average rainfall in September - Samuel, Portugal
  • Average rainfall in September: 25mm

The wettest month (with the highest rainfall) is November (97mm).
The driest month (with the least rainfall) is July (6mm).

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Average rainfall days in September
Samuel, Portugal

Average rainfall days in September - Samuel, Portugal
  • Average rainfall days in September: 6.2 days

The month with the highest number of rainy days is November (16 days).
The month with the least rainy days is August (4.5 days).

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

Average daylight in September / Average sunshine in September - Samuel, 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: 9.3h

The month with the most sunshine is July (Average sunshine: 11.2h).
The month with the least sunshine is January (Average sunshine: 5.2h).

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Average sunshine days in September
Samuel, Portugal

Average sunshine days in September - Samuel, Portugal
  • Average sunshine days in September: 21.8 days

The month with the most sunshine days is August (23.9 days).
The month with the least sunshine days is November (11.9 days).

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Average UV index in September
Samuel, Portugal

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

Months with the highest UV index are May, June, July, August and September (UV index 5).
The month with the lowest UV index is January (UV index 3).

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Average cloud cover in September
Samuel, Portugal

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

The month with the most cloud cover is January (Cloud cover 42).
Months with the least cloud cover are August and September (Cloud cover 20).

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Average visibility in September
Samuel, Portugal

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

Months with the highest visibility are January, February, March, April, May, June, September, October, November and December (10km).
Months with the lowest visibility are July and August (9km).

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