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 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 weather displays an average high-temperature of a still moderately hot 25.6°C (78.1°F), slightly varied from August's 27.1°C (80.8°F). During September, Seixal records a consistent average nighttime temperature of 17.5°C (63.5°F).Humidity
In Seixal, the average relative humidity in September is 69%.Rainfall
In September, the rain falls for 3.1 days. Throughout September, 2mm (0.08") of precipitation is accumulated. Throughout the year, there are 54.2 rainfall days, and 61mm (2.4") of precipitation is accumulated.Daylight
In Seixal, Portugal, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 07:06 and sunset at 20:06. On the last day of the month, sunrise is at 07:31 and sunset at 19:20 WEST.
Sunshine
In September, the average sunshine in Seixal is 9.4h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What are the temperatures in Seixal in September?
What is the average humidity in September in Seixal?
How many days does it rain in September in Seixal?
What is the average length of the day in September in Seixal?
When is the sunrise / sunset in September in Seixal?
How long on average sun shines in September in Seixal?
What is the month with the highest UV index in Seixal?
How high is the UV index in September in Seixal?
Average temperature in September
Seixal, 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
Seixal, 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
Seixal, 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
Seixal, 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
Seixal, 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
Seixal, 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 daylight in September /
Average sunshine in September
Seixal, 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
Seixal, 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
Seixal, 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
Seixal, 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
Seixal, 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).
Seixal, Portugal
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