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
The advent of September denotes an average high-temperature of a still warm 24.5°C (76.1°F), subtly different from August's 25.9°C (78.6°F). Throughout the month of September, Alvor reports a steady low-temperature average of 19.4°C (66.9°F).Humidity
The average relative humidity in September in Alvor is 71%.Rainfall
June through September are months without rainfall.Sea temperature
September is the month with the warmest seawater, with an average sea temperature of 21.2°C (70.2°F).Note: Swimming in water that is 21.2°C (70.2°F) is not enjoyable for most. Breathing becomes more challenging to manage as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September in Alvor is 12h and 25min.On the first day of the month, sunrise is at 07:05 and sunset at 20:02. On the last day of September, in Alvor, sunrise is at 07:29 and sunset at 19:19 WEST.
Sunshine
The average sunshine in September is 9.6h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum UV index of 6 in September translates into the following recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Caution! Sand and water reflections can notably increase the UV radiation intensity.
Frequently asked questions
What are September temperatures in Alvor?
What is the average humidity in September in Alvor?
What is the driest month in Alvor?
Does it rain in Alvor in September?
When is the sea warmest in Alvor?
How cold is the water in September in Alvor?
How many hours of daylight does Alvor have in September?
What time are sunrise and sunset in September in Alvor?
How long on average sun shines in September in Alvor?
When is the highest UV index in Alvor?
How high is the UV index in September in Alvor?
Average temperature in September
Alvor, Portugal
- Average high temperature in September: 24.5°C
The warmest month (with the highest average high temperature) is August (25.9°C).
The month with the lowest average high temperature is January (15.2°C).
- Average low temperature in September: 19.4°C
The month with the highest average low temperature is August (19.7°C).
The coldest month (with the lowest average low temperature) is February (11.3°C).
Average pressure in September
Alvor, Portugal
- Average pressure in September: 1016.7mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Alvor, Portugal
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is February (19.1km/h).
The calmest month (with the lowest average wind speed) is September (13.6km/h).
Average humidity in September
Alvor, Portugal
- Average humidity in September: 71%
The month with the highest relative humidity is April (76%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Alvor, Portugal
- Average rainfall in September: 0mm
The wettest month (with the highest rainfall) is November (8mm).
The driest months (with the least rainfall) are June, July, August and September (0mm).
Average rainfall days in September
Alvor, Portugal
- Average rainfall days in September: 1.4 days
The month with the highest number of rainy days is April (4.8 days).
The month with the least rainy days is August (0.2 days).
Average sea temperature in September
Alvor, Portugal
- Average sea temperature in September: 21.2°C
The best month for swimming (with the highest average sea temperature) is September (21.2°C).
The coldest month (with the lowest average sea temperature) is March (16°C).
Average daylight in September /
Average sunshine in September
Alvor, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in September
Alvor, Portugal
- Average sunshine days in September: 28.5 days
The months with the most sunshine days are July and August (30.6 days).
The month with the least sunshine days is November (23.2 days).
Average UV index in September
Alvor, Portugal
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Alvor, Portugal
- Average cloud cover in September: 14
The month with the most cloud cover is January (Cloud cover 32).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in September
Alvor, 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).
Alvor, Portugal
Weather forecast for your location
2. Allow the app to use your location
