September weather forecastAlfragide, Portugal
September weather for Alfragide, Portugal: On the first day of September in Alfragide, Portugal, sunrise is at 07:06 and sunset at 20:06. 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).
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.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 12h and 24min
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 24min
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: 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: 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: 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: 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).
