September weather forecast and climate
Rio de Onor, Portugal

Weather in September

September, the first month of the autumn, in Rio de Onor, is also a moderately hot month, with average temperature ranging between max 24.3°C (75.7°F) and min 11.5°C (52.7°F).

Temperature

In Rio de Onor, the average high-temperature marginally drops, from 28.3°C (82.9°F) in August, to a still warm 24.3°C (75.7°F). In September, in Rio de Onor, the average low-temperature is 11.5°C (52.7°F).

Humidity

In Rio de Onor, the average relative humidity is 57%.

Rainfall

In Rio de Onor, during September, the rain falls for 7.2 days and regularly aggregates up to 32mm (1.26") of precipitation. In Rio de Onor, during the entire year, the rain falls for 141.7 days and collects up to 532mm (20.94") of precipitation.

Snowfall

In Rio de Onor, Portugal, snow does not fall in April through October.

Daylight

In Rio de Onor, the average length of the day in September is 12.5h.

Sunshine

The average sunshine in September is 9.6h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard 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 sunburn is recommended. 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 Rio de Onor?

The average high-temperature, in September, in Rio de Onor, Portugal, is 24.3°C (75.7°F), while the average low-temperature is 11.5°C (52.7°F).

What is the average humidity in September in Rio de Onor?

In Rio de Onor, the average relative humidity in September is 57%.

How many days does it rain in September in Rio de Onor?

In September, in Rio de Onor, the rain falls for 7.2 days. Throughout September, 32mm (1.26") of precipitation is accumulated.

When it does not snow in Rio de Onor?

April through October are months without snowfall in Rio de Onor.

What is the average length of the day in September in Rio de Onor?

In Rio de Onor, the average length of the day in September is 12.5h.

How many hours of sunshine does Rio de Onor have in September?

In September, the average sunshine in Rio de Onor is 9.6h.

What is the UV index intensity in September in Rio de Onor?

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

Average temperature in September
Rio de Onor, Portugal

Average temperature in September - Rio de Onor, Portugal
  • Average high temperature in September: 24.3°C

The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (8.3°C).

  • Average low temperature in September: 11.5°C

The month with the highest average low temperature is July (13.8°C).
The coldest month (with the lowest average low temperature) is February (1.2°C).

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Average pressure in September
Rio de Onor, Portugal

Average pressure in September - Rio de Onor, Portugal
  • Average pressure in September: 1017.8mbar

The month with the highest atmospheric pressure is December (1022.9mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).

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Average wind speed in September
Rio de Onor, Portugal

Average wind speed in September - Rio de Onor, Portugal
  • Average wind speed in September: 8.4km/h

The windiest month (with the highest average wind speed) is March (11.2km/h).
The calmest month (with the lowest average wind speed) is September (8.4km/h).

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Average humidity in September
Rio de Onor, Portugal

Average humidity in September - Rio de Onor, Portugal
  • Average humidity in September: 57%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (52%).

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Average rainfall in September
Rio de Onor, Portugal

Average rainfall in September - Rio de Onor, Portugal
  • Average rainfall in September: 32mm

The wettest month (with the highest rainfall) is November (73mm).
The driest month (with the least rainfall) is August (11mm).

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Average rainfall days in September
Rio de Onor, Portugal

Average rainfall days in September - Rio de Onor, Portugal
  • Average rainfall days in September: 7.2 days

The month with the highest number of rainy days is April (17.6 days).
The month with the least rainy days is August (4.2 days).

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Average snowfall in September
Rio de Onor, Portugal

Average snowfall in September - Rio de Onor, Portugal
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (19mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Rio de Onor, Portugal

Average snowfall days in September - Rio de Onor, Portugal
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.1 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Rio de Onor, Portugal

Average daylight in September / Average sunshine in September - Rio de Onor, 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: 9.6h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is January (Average sunshine: 4.8h).

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Average sunshine days in September
Rio de Onor, Portugal

Average sunshine days in September - Rio de Onor, Portugal
  • Average sunshine days in September: 20.8 days

The month with the most sunshine days is August (24.5 days).
The month with the least sunshine days is April (10.8 days).

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Average UV index in September
Rio de Onor, Portugal

Average UV index in September - Rio de Onor, 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
Rio de Onor, Portugal

Average cloud cover in September - Rio de Onor, Portugal
  • Average cloud cover in September: 20

The month with the most cloud cover is January (Cloud cover 50).
Months with the least cloud cover are July and August (Cloud cover 13).

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Average visibility in September
Rio de Onor, Portugal

Average visibility in September - Rio de Onor, Portugal
  • Average visibility in September: 10km

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

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