September weather forecast and climate
Rebelva, Portugal

Weather in September

September, the first month of the autumn, in Rebelva, is still a warm month, with average temperature ranging between min 18.2°C (64.8°F) and max 23.6°C (74.5°F).

Temperature

In Rebelva, the average high-temperature is relatively the same as in August - a still warm 23.6°C (74.5°F). The average low-temperature, in Rebelva, Portugal, is 18.2°C (64.8°F).

Humidity

The average relative humidity in Rebelva is 73%.

Rainfall

In Rebelva, during 4.9 rainfall days, 10mm (0.39") of precipitation is typically accumulated. Throughout the year, there are 85.8 rainfall days, and 215mm (8.46") of precipitation is accumulated.

Daylight

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

Sunshine

The average sunshine in Rebelva is 9.4h.

UV index

Months with the highest UV index in Rebelva are June through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. 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 Rebelva?

In Rebelva, Portugal, in September, the average high-temperature is 23.6°C (74.5°F), and the average low-temperature is 18.2°C (64.8°F).

What is the average humidity in September in Rebelva?

In Rebelva, the average relative humidity in September is 73%.

How many days does it rain in September in Rebelva?

In Rebelva, in September, it is raining for 4.9 days, with typically 10mm (0.39") of accumulated precipitation.

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

In Rebelva, Portugal, the average length of the day in September is 12.4h.

How long on average sun shines in September in Rebelva?

In Rebelva, Portugal, the average sunshine in September is 9.4h.

When is the highest UV index in Rebelva?

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

What is the UV index intensity in September in Rebelva?

In Rebelva, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Rebelva, Portugal

Average temperature in September - Rebelva, Portugal
  • Average high temperature in September: 23.6°C

The warmest month (with the highest average high temperature) is August (24.5°C).
The month with the lowest average high temperature is January (14.8°C).

  • Average low temperature in September: 18.2°C

The month with the highest average low temperature is August (18.6°C).
The coldest month (with the lowest average low temperature) is February (10.8°C).

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Average pressure in September
Rebelva, Portugal

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

Months with the highest atmospheric pressure are January and December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).

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Average wind speed in September
Rebelva, Portugal

Average wind speed in September - Rebelva, Portugal
  • Average wind speed in September: 15.8km/h

The windiest month (with the highest average wind speed) is February (19.5km/h).
The calmest month (with the lowest average wind speed) is October (15.6km/h).

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Average humidity in September
Rebelva, Portugal

Average humidity in September - Rebelva, Portugal
  • Average humidity in September: 73%

Months with the highest relative humidity are January, April, July and December (75%).
Months with the lowest relative humidity are May and October (72%).

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Average rainfall in September
Rebelva, Portugal

Average rainfall in September - Rebelva, Portugal
  • Average rainfall in September: 10mm

The wettest month (with the highest rainfall) is November (44mm).
The driest month (with the least rainfall) is July (2mm).

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Average rainfall days in September
Rebelva, Portugal

Average rainfall days in September - Rebelva, Portugal
  • Average rainfall days in September: 4.9 days

The month with the highest number of rainy days is November (12.4 days).
The month with the least rainy days is August (1.9 days).

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

Average daylight in September / Average sunshine in September - Rebelva, 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: 9.5h).

  • Average sunshine in September: 9.4h

The month with the most sunshine is July (Average sunshine: 11.4h).
The month with the least sunshine is January (Average sunshine: 5.5h).

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Average sunshine days in September
Rebelva, Portugal

Average sunshine days in September - Rebelva, Portugal
  • Average sunshine days in September: 24.5 days

The month with the most sunshine days is August (28 days).
The month with the least sunshine days is November (15.6 days).

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Average UV index in September
Rebelva, Portugal

Average UV index in September - Rebelva, 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, November and December (UV index 4).

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Average cloud cover in September
Rebelva, Portugal

Average cloud cover in September - Rebelva, Portugal
  • Average cloud cover in September: 16

The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in September
Rebelva, Portugal

Average visibility in September - Rebelva, 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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