September weather forecast and climate
Unhão, Portugal

Weather in September

September, the first month of the autumn, in Unhão, is also a moderately hot month, with average temperature varying between 12.3°C (54.1°F) and 25.6°C (78.1°F).

Temperature

In September, the average high-temperature is almost the same as in August - a still warm 25.6°C (78.1°F). In September, in Unhão, the average low-temperature is 12.3°C (54.1°F).

Humidity

In September, the average relative humidity is 64%.

Rainfall

In Unhão, during September, the rain falls for 8.3 days and regularly aggregates up to 35mm (1.38") of precipitation. Throughout the year, in Unhão, there are 143.2 rainfall days, and 798mm (31.42") of precipitation is accumulated.

Snowfall

February through December are months without snowfall in Unhão.

Daylight

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

Sunshine

The average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index 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 ordinary individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Unhão?

The average high-temperature, in September, in Unhão, is 25.6°C (78.1°F), while the average low-temperature is 12.3°C (54.1°F).

What is the average humidity in September in Unhão?

In September, the average relative humidity in Unhão is 64%.

How much does it rain in Unhão in September?

In Unhão, in September, it is raining for 8.3 days, with typically 35mm (1.38") of accumulated precipitation.

When it does not snow in Unhão?

In Unhão, Portugal, snow does not fall in February through December.

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

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

How many hours of sunshine does Unhão have in September?

The average sunshine in September in Unhão is 8.8h.

What is the UV index reading in September in Unhão?

The average daily maximum UV index in September in Unhão is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Unhão, Portugal

Average temperature in September - Unhão, Portugal
  • Average high temperature in September: 25.6°C

The warmest month (with the highest average high temperature) is August (28.5°C).
The month with the lowest average high temperature is January (10.5°C).

  • Average low temperature in September: 12.3°C

Months with the highest average low temperature are July and August (12.8°C).
The coldest month (with the lowest average low temperature) is February (3.3°C).

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Average pressure in September
Unhão, Portugal

Average pressure in September - Unhão, Portugal
  • Average pressure in September: 1017.3mbar

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
Unhão, Portugal

Average wind speed in September - Unhão, Portugal
  • Average wind speed in September: 6.3km/h

The windiest month (with the highest average wind speed) is March (8.1km/h).
The calmest month (with the lowest average wind speed) is September (6.3km/h).

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Average humidity in September
Unhão, Portugal

Average humidity in September - Unhão, Portugal
  • Average humidity in September: 64%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (62%).

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Average rainfall in September
Unhão, Portugal

Average rainfall in September - Unhão, Portugal
  • Average rainfall in September: 35mm

The wettest month (with the highest rainfall) is December (124mm).
The driest month (with the least rainfall) is July (10mm).

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Average rainfall days in September
Unhão, Portugal

Average rainfall days in September - Unhão, Portugal
  • Average rainfall days in September: 8.3 days

Months with the highest number of rainy days are April and November (16.2 days).
The month with the least rainy days is August (5.3 days).

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Average snowfall in September
Unhão, Portugal

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

The month with the highest snowfall is January (1mm).
Months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days in September
Unhão, Portugal

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

The month with the highest number of snowfall days is January (0.1 days).
Months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in September / Average sunshine in September - Unhão, 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: 8.8h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is January (Average sunshine: 4.1h).

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Average sunshine days in September
Unhão, Portugal

Average sunshine days in September - Unhão, Portugal
  • Average sunshine days in September: 20.3 days

The month with the most sunshine days is August (24.1 days).
The month with the least sunshine days is April (11.8 days).

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Average UV index in September
Unhão, Portugal

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

Months with the highest UV index are July and August (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
Unhão, Portugal

Average cloud cover in September - Unhão, Portugal
  • Average cloud cover in September: 28

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 23).

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Average visibility in September
Unhão, Portugal

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

Months with the highest visibility are August and September (9km).
The month with the lowest visibility is January (6km).

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