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 brings an average high-temperature of a still moderately hot 25.6°C (78.1°F), almost identical to the preceding month. In Almada, September nights cool down to an average of 17.5°C (63.5°F).Humidity
The average relative humidity in September in Almada, Portugal, is 69%.Rainfall
In Almada, Portugal, during September, the rain falls for 3.1 days and regularly aggregates up to 2mm (0.08") of precipitation. In Almada, during the entire year, the rain falls for 54.2 days and collects up to 61mm (2.4") of precipitation.Sea temperature
September is the month with the warmest seawater in Almada, with an average sea temperature of 19.9°C (67.8°F).Note: For most, swimming in 19.9°C (67.8°F) is not a pleasant experience. As the temperature falls from 21°C (69.8°F) to 15°C (59°F), controlling one's breathing becomes more difficult.
Daylight
In Almada, 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 Almada, sunrise is at 07:32 and sunset at 19:20 WEST.
Sunshine
The average sunshine in September in Almada is 9.4h.UV index
May through September, with an average maximum UV index of 6, are months with the highest UV index in Almada. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Deflect overexposure. Sun protection is a necessity. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
What are the temperatures in Almada in September?
What is the average humidity in September in Almada?
How much does it rain in Almada in September?
What is the month with the warmest sea water in Almada?
What is the sea water temperature in September in Almada?
What is the average length of the day in September in Almada?
What time are sunrise and sunset in September in Almada?
How many hours of sunshine does Almada have in September?
What is the month with the highest UV index in Almada?
How high is the UV index in September in Almada?
Average temperature in September
Almada, Portugal
- Average high temperature in September: 25.6°C
The warmest month (with the highest average high temperature) is August (27.1°C).
The month with the lowest average high temperature is January (14.9°C).
- Average low temperature in September: 17.5°C
The month with the highest average low temperature is July (17.9°C).
The coldest month (with the lowest average low temperature) is February (9.8°C).
Average pressure in September
Almada, Portugal
- Average pressure in September: 1016.9mbar
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
Almada, Portugal
- Average wind speed in September: 13.1km/h
The windiest month (with the highest average wind speed) is February (16.5km/h).
The calmest month (with the lowest average wind speed) is September (13.1km/h).
Average humidity in September
Almada, Portugal
- Average humidity in September: 69%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Almada, Portugal
- Average rainfall in September: 2mm
The wettest month (with the highest rainfall) is November (15mm).
The driest months (with the least rainfall) are June, July and August (1mm).
Average rainfall days in September
Almada, Portugal
- Average rainfall days in September: 3.1 days
The month with the highest number of rainy days is November (9.3 days).
The month with the least rainy days is August (0.8 days).
Average sea temperature in September
Almada, 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
Almada, 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
Almada, Portugal
- Average sunshine days in September: 26.3 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is November (17.7 days).
Average UV index in September
Almada, Portugal
- Average UV index in September: 6
The months with the highest UV index are May, 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
Almada, 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).
Average visibility in September
Almada, 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).
Almada, Portugal
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