September weather forecast and climate
Porrais, Portugal

Weather in September

The first month of the autumn, September, is also a moderately hot month in Porrais, Portugal, with average temperature fluctuating between 13°C (55.4°F) and 25.4°C (77.7°F).

Temperature

In Porrais, the average high-temperature slightly decreases, from a warm 29.5°C (85.1°F) in August, to a still moderately hot 25.4°C (77.7°F). In Porrais, Portugal, the average low-temperature is 13°C (55.4°F).

Humidity

In September, the average relative humidity is 53%.

Rainfall

In September, in Porrais, the rain falls for 6.3 days. Throughout September, 28mm (1.1") of precipitation is accumulated. In Porrais, during the entire year, the rain falls for 120.8 days and collects up to 376mm (14.8") of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

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

Sunshine

The average sunshine in September is 9.8h.

UV index

In September, the average daily maximum UV index in Porrais is 5. A UV Index of 3 to 5 symbolizes a medium health hazard 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. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
[Resources]

FAQ

What is the temperature in September in Porrais?

In Porrais, in September, the average high-temperature is 25.4°C (77.7°F), and the average low-temperature is 13°C (55.4°F).

What is the average humidity in September in Porrais?

In September, the average relative humidity is 53%.

How much does it rain in Porrais in September?

In Porrais, in September, during 6.3 rainfall days, 28mm (1.1") of precipitation is typically accumulated.

When it does not snow in Porrais?

In Porrais, Portugal, snow does not fall in April through October.

How many hours of daylight does Porrais have in September?

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

How many hours of sunshine does Porrais have in September?

In Porrais, the average sunshine in September is 9.8h.

What is the UV index intensity in September in Porrais?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.

Average temperature in September
Porrais, Portugal

Average temperature in September - Porrais, Portugal
  • Average high temperature in September: 25.4°C

The warmest month (with the highest average high temperature) is August (29.5°C).
The month with the lowest average high temperature is January (8.9°C).

  • Average low temperature in September: 13°C

The month with the highest average low temperature is July (15.3°C).
The coldest month (with the lowest average low temperature) is January (1.9°C).

[Resources]

Average pressure in September
Porrais, Portugal

Average pressure in September - Porrais, Portugal
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is December (1023.1mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).

[Resources]

Average wind speed in September
Porrais, Portugal

Average wind speed in September - Porrais, Portugal
  • Average wind speed in September: 10km/h

The windiest month (with the highest average wind speed) is March (13.2km/h).
The calmest month (with the lowest average wind speed) is September (10km/h).

[Resources]

Average humidity in September
Porrais, Portugal

Average humidity in September - Porrais, Portugal
  • Average humidity in September: 53%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (47%).

[Resources]

Average rainfall in September
Porrais, Portugal

Average rainfall in September - Porrais, Portugal
  • Average rainfall in September: 28mm

The wettest month (with the highest rainfall) is November (54mm).
The driest month (with the least rainfall) is August (7mm).

[Resources]

Average rainfall days in September
Porrais, Portugal

Average rainfall days in September - Porrais, Portugal
  • Average rainfall days in September: 6.3 days

The month with the highest number of rainy days is April (16.6 days).
The month with the least rainy days is August (2.9 days).

[Resources]

Average snowfall in September
Porrais, Portugal

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

The month with the highest snowfall is February (13mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

[Resources]

Average snowfall days in September
Porrais, Portugal

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

The month with the highest number of snowfall days is February (1.4 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

[Resources]

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

Average daylight in September / Average sunshine in September - Porrais, 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: 9.2h).

  • Average sunshine in September: 9.8h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is January (Average sunshine: 4.9h).

[Resources]

Average sunshine days in September
Porrais, Portugal

Average sunshine days in September - Porrais, Portugal
  • Average sunshine days in September: 22.6 days

The month with the most sunshine days is August (26.1 days).
The month with the least sunshine days is April (12 days).

[Resources]

Average UV index in September
Porrais, Portugal

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

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

[Resources]

Average cloud cover in September
Porrais, Portugal

Average cloud cover in September - Porrais, Portugal
  • Average cloud cover in September: 19

The month with the most cloud cover is January (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 11).

[Resources]

Average visibility in September
Porrais, Portugal

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

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

[Resources]