September weather forecast and climate
Ribeira de Moinhos, Portugal

Weather in September

The first month of the autumn, September, is still a warm month in Ribeira de Moinhos, Portugal, with average temperature fluctuating between 23.5°C (74.3°F) and 18.8°C (65.8°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still moderately hot 23.5°C (74.3°F). In September, in Ribeira de Moinhos, Portugal, the average low-temperature is 18.8°C (65.8°F).

Humidity

In Ribeira de Moinhos, the average relative humidity is 73%.

Rainfall

In Ribeira de Moinhos, during 4.1 rainfall days, 13mm (0.51") of precipitation is typically accumulated. Throughout the year, in Ribeira de Moinhos, there are 94.6 rainfall days, and 327mm (12.87") of precipitation is accumulated.

Daylight

In Ribeira de Moinhos, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine in Ribeira de Moinhos, Portugal, is 9.5h.

UV index

Months with the highest UV index in Ribeira de Moinhos, Portugal, are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 Ribeira de Moinhos?

In Ribeira de Moinhos, Portugal, in September, the average high-temperature is 23.5°C (74.3°F), and the average low-temperature is 18.8°C (65.8°F).

What is the average humidity in September in Ribeira de Moinhos?

The average relative humidity in September in Ribeira de Moinhos is 73%.

How much does it rain in Ribeira de Moinhos in September?

In Ribeira de Moinhos, Portugal, in September, during 4.1 rainfall days, 13mm (0.51") of precipitation is typically accumulated.

How many hours of daylight does Ribeira de Moinhos have in September?

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

How many hours of sunshine does Ribeira de Moinhos have in September?

The average sunshine in September in Ribeira de Moinhos, Portugal, is 9.5h.

When is the highest UV index in Ribeira de Moinhos?

Months with the highest UV index in Ribeira de Moinhos, Portugal, are June through September, with an average maximum UV index of 6.

What is the UV index intensity in September in Ribeira de Moinhos?

In Ribeira de Moinhos, Portugal, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.

Average temperature in September
Ribeira de Moinhos, Portugal

Average temperature in September - Ribeira de Moinhos, Portugal
  • Average high temperature in September: 23.5°C

The warmest month (with the highest average high temperature) is August (24.2°C).
The month with the lowest average high temperature is February (14.8°C).

  • Average low temperature in September: 18.8°C

Months with the highest average low temperature are August and September (18.8°C).
The coldest month (with the lowest average low temperature) is February (10.8°C).

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Average pressure in September
Ribeira de Moinhos, Portugal

Average pressure in September - Ribeira de Moinhos, Portugal
  • Average pressure in September: 1016.9mbar

The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).

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Average wind speed in September
Ribeira de Moinhos, Portugal

Average wind speed in September - Ribeira de Moinhos, Portugal
  • Average wind speed in September: 15.1km/h

The windiest month (with the highest average wind speed) is February (19.4km/h).
The calmest month (with the lowest average wind speed) is September (15.1km/h).

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Average humidity in September
Ribeira de Moinhos, Portugal

Average humidity in September - Ribeira de Moinhos, Portugal
  • Average humidity in September: 73%

The month with the highest relative humidity is April (76%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Ribeira de Moinhos, Portugal

Average rainfall in September - Ribeira de Moinhos, Portugal
  • Average rainfall in September: 13mm

The wettest month (with the highest rainfall) is November (56mm).
The driest month (with the least rainfall) is July (1mm).

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Average rainfall days in September
Ribeira de Moinhos, Portugal

Average rainfall days in September - Ribeira de Moinhos, Portugal
  • Average rainfall days in September: 4.1 days

The month with the highest number of rainy days is November (13.4 days).
The month with the least rainy days is August (1.1 days).

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Average daylight in September /
Average sunshine in September
Ribeira de Moinhos, Portugal

Average daylight in September / Average sunshine in September - Ribeira de Moinhos, Portugal
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is July (Average sunshine: 11.5h).
The month with the least sunshine is January (Average sunshine: 5.7h).

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Average sunshine days in September
Ribeira de Moinhos, Portugal

Average sunshine days in September - Ribeira de Moinhos, Portugal
  • Average sunshine days in September: 25.1 days

The month with the most sunshine days is August (29.4 days).
The month with the least sunshine days is April (15.3 days).

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Average UV index in September
Ribeira de Moinhos, Portugal

Average UV index in September - Ribeira de Moinhos, Portugal
  • Average UV index in September: 6

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, April, November and December (UV index 4).

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Average cloud cover in September
Ribeira de Moinhos, Portugal

Average cloud cover in September - Ribeira de Moinhos, Portugal
  • Average cloud cover in September: 16

The month with the most cloud cover is January (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 10).

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Average visibility in September
Ribeira de Moinhos, Portugal

Average visibility in September - Ribeira de Moinhos, Portugal
  • Average visibility in September: 10km

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

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