Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival registers an average high-temperature of a still moderately hot 24.7°C (76.5°F), closely aligning with the temperature of the previous month. In Algés, September is marked by an average low-temperature of 17.9°C (64.2°F).Humidity
In Algés, the average relative humidity in September is 71%.Rainfall
In Algés, in September, during 5.7 rainfall days, 19mm (0.75") of precipitation is typically accumulated. In Algés, during the entire year, the rain falls for 112.7 days and collects up to 389mm (15.31") of precipitation.Sea temperature
September is the month with the warmest seawater, with an average sea temperature of 19.9°C (67.8°F).Note: Swimming in 19.9°C (67.8°F) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 21°C (69.8°F).
Daylight
The average length of the day in September 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 Algés, sunrise is at 07:32 and sunset at 19:21 WEST.
Sunshine
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 in Algés. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the UV index of 6 transforms into the following advice:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
What is the usual temperature for Algés in September?
What is the average humidity in September in Algés?
How many days does it rain in September in Algés?
What month is the sea warmest in Algés?
What is the sea temperature in September in Algés?
What is the average length of the day in September in Algés?
When are sunrise and sunset in September in Algés?
How long on average sun shines in September in Algés?
When is the highest UV index in Algés?
What is the UV index intensity in September in Algés?
Average temperature in September
Algés, 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
Algés, 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
Algés, 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
Algés, 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
Algés, 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
Algés, 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 sea temperature in September
Algés, Portugal
- Average sea temperature in September: 19.9°C
The best month for swimming (with the highest average sea temperature) is September (19.9°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).
Average daylight in September /
Average sunshine in September
Algés, 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
Algés, 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
Algés, 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
Algés, 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
Algés, 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).
Algés, Portugal
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