September weather forecast
Alfragide, Portugal

September

Weather in September

September, the first month of the autumn in Alfragide, is still a warm month, with an average temperature varying between 24.7°C (76.5°F) and 17.9°C (64.2°F).

Temperature

Alfragide experiences an average high-temperature of a still moderately hot 24.7°C (76.5°F) with the onset of September, subtly varied from August's 25.8°C (78.4°F). An average low-temperature of 17.9°C (64.2°F) marks the nights in Alfragide throughout September.

Humidity

In September, the average relative humidity is 71%.

Rainfall

In September, in Alfragide, the rain falls for 5.7 days. Throughout September, 19mm (0.75") of precipitation is accumulated. Throughout the year, there are 112.7 rainfall days, and 389mm (15.31") of precipitation is accumulated.

Daylight

In September, the average length of the day in Alfragide, Portugal, is 12h and 26min.
On the first day of the month, sunrise is at 07:06 and sunset at 20:06. On the last day of September, in Alfragide, sunrise is at 07:32 and sunset at 19:21 WEST.

Sunshine

In Alfragide, the average sunshine in September is 9.4h.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.

Frequently asked questions

What is the temperature in September in Alfragide?
The high-temperature, in September, in Alfragide, is 24.7°C (76.5°F), while the low-temperature averages to 17.9°C (64.2°F).
What is the average humidity in September in Alfragide?
In Alfragide, Portugal, the average relative humidity in September is 71%.
How many days does it rain in September in Alfragide?
In September, in Alfragide, Portugal, the rain falls for 5.7 days. Throughout September, 19mm (0.75") of precipitation is accumulated.
How many hours of daylight does Alfragide have in September?
In September, the average day length in Alfragide is 12h and 26min.
When are sunrise and sunset in September in Alfragide?
On the first day of September in Alfragide, Portugal, sunrise is at 07:06 and sunset at 20:06. On the last day of the month, sunrise is at 07:32 and sunset at 19:21 WEST.
How long on average sun shines in September in Alfragide?
The average sunshine duration in September in Alfragide, Portugal, is 9.4h.
What is the month with the highest UV index in Alfragide?
June through September, with an average maximum UV index of 6, are months with the highest UV index in Alfragide.
What is the UV index reading in September in Alfragide?
In Alfragide, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - Alfragide, Portugal
Average temperature in September
Alfragide, Portugal
  • Average high temperature in September: 24.7°C

The warmest month (with the highest average high temperature) is August (25.8°C).
The month with the lowest average high temperature is January (14.5°C).

  • Average low temperature in September: 17.9°C

The months with the highest average low temperature are July and August (18.1°C).
The coldest month (with the lowest average low temperature) is February (10.3°C).

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

The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).

Average wind speed in September - Alfragide, Portugal
Average wind speed in September
Alfragide, Portugal
  • Average wind speed in September: 14.4km/h

The windiest month (with the highest average wind speed) is February (17.8km/h).
The calmest month (with the lowest average wind speed) is October (14.1km/h).

Average humidity in September - Alfragide, Portugal
Average humidity in September
Alfragide, Portugal
  • Average humidity in September: 71%

The month with the highest relative humidity is January (76%).
The months with the lowest relative humidity are May and August (70%).

Average rainfall in September - Alfragide, Portugal
Average rainfall in September
Alfragide, Portugal
  • Average rainfall in September: 19mm

The wettest month (with the highest rainfall) is November (69mm).
The driest month (with the least rainfall) is July (2mm).

Average rainfall days in September - Alfragide, Portugal
Average rainfall days in September
Alfragide, Portugal
  • Average rainfall days in September: 5.7 days

The month with the highest number of rainy days is November (14.4 days).
The month with the least rainy days is August (2.6 days).

Average daylight in September / Average sunshine in September - Alfragide, Portugal
Average daylight in September /
Average sunshine in September
Alfragide, Portugal
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

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

The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is November (13.3 days).

Average UV index in September - Alfragide, Portugal
Average UV index in September
Alfragide, Portugal
  • Average UV index in September: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in September - Alfragide, Portugal
Average cloud cover in September
Alfragide, Portugal
  • Average cloud cover in September: 17

The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 14).

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

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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