September weather forecast and climate
Ribeiradio, Portugal

Weather in September

The first month of the autumn, September, is still a warm month in Ribeiradio, Portugal, with temperature in the range of an average low of 13.5°C (56.3°F) and an average high of 26.5°C (79.7°F).

Temperature

In Ribeiradio, Portugal, the average high-temperature is essentially the same as in August - a still moderately hot 26.5°C (79.7°F). The average low-temperature, in Ribeiradio, is 13.5°C (56.3°F).

Humidity

In September, the average relative humidity in Ribeiradio, Portugal, is 63%.

Rainfall

In Ribeiradio, during September, the rain falls for 6.2 days and regularly aggregates up to 21mm (0.83") of precipitation. Throughout the year, in Ribeiradio, there are 127.4 rainfall days, and 613mm (24.13") of precipitation is accumulated.

Snowfall

May through October and December are months without snowfall in Ribeiradio.

Daylight

In Ribeiradio, the average length of the day is 12.5h.

Sunshine

In Ribeiradio, the average sunshine in September is 9.3h.

UV index

The average daily maximum UV index in Ribeiradio is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for average individuals.
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. 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 Ribeiradio?

The average high-temperature, in September, in Ribeiradio, is 26.5°C (79.7°F), while the average low-temperature is 13.5°C (56.3°F).

What is the average humidity in September in Ribeiradio?

The average relative humidity in September in Ribeiradio, Portugal, is 63%.

How much does it rain in Ribeiradio in September?

In Ribeiradio, in September, it is raining for 6.2 days, with typically 21mm (0.83") of accumulated precipitation.

When it does not snow in Ribeiradio?

May through October and December are months without snowfall.

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

In Ribeiradio, the average length of the day in September is 12.5h.

How many hours of sunshine does Ribeiradio have in September?

In September, the average sunshine is 9.3h.

What is the UV index reading in September in Ribeiradio?

In September, the average daily maximum UV index in Ribeiradio is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Ribeiradio, Portugal

Average temperature in September - Ribeiradio, Portugal
  • Average high temperature in September: 26.5°C

The warmest month (with the highest average high temperature) is August (28.8°C).
The month with the lowest average high temperature is January (12°C).

  • Average low temperature in September: 13.5°C

The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (4.3°C).

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Average pressure in September
Ribeiradio, Portugal

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

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
Ribeiradio, Portugal

Average wind speed in September - Ribeiradio, Portugal
  • Average wind speed in September: 6.9km/h

The windiest month (with the highest average wind speed) is March (8.8km/h).
The calmest month (with the lowest average wind speed) is September (6.9km/h).

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Average humidity in September
Ribeiradio, Portugal

Average humidity in September - Ribeiradio, Portugal
  • Average humidity in September: 63%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (62%).

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Average rainfall in September
Ribeiradio, Portugal

Average rainfall in September - Ribeiradio, Portugal
  • Average rainfall in September: 21mm

The wettest month (with the highest rainfall) is November (96mm).
The driest month (with the least rainfall) is July (6mm).

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Average rainfall days in September
Ribeiradio, Portugal

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

Months with the highest number of rainy days are January and April (14.7 days).
The month with the least rainy days is August (3.9 days).

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Average snowfall in September
Ribeiradio, Portugal

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

Months with the highest snowfall are January and March (2mm).
Months with the least snowfall are May, June, July, August, September, October and December (0mm).

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Average snowfall days in September
Ribeiradio, Portugal

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

Months with the highest number of snowfall days are January, February and March (0.3 days).
Months with the least snowfall days are May, June, July, August, September, October and December (0 days).

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

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

The month with the most sunshine is July (Average sunshine: 11.4h).
The month with the least sunshine is January (Average sunshine: 5h).

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Average sunshine days in September
Ribeiradio, Portugal

Average sunshine days in September - Ribeiradio, Portugal
  • Average sunshine days in September: 21.9 days

The month with the most sunshine days is August (25 days).
The month with the least sunshine days is November (13.5 days).

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Average UV index in September
Ribeiradio, Portugal

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

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

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Average cloud cover in September
Ribeiradio, Portugal

Average cloud cover in September - Ribeiradio, Portugal
  • Average cloud cover in September: 22

The month with the most cloud cover is January (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 18).

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Average visibility in September
Ribeiradio, Portugal

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

Months with the highest visibility are June, July, August and September (9km).
The month with the lowest visibility is January (7km).

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