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 onset in Sesimbra, Portugal, sees an average high-temperature of a still warm 26.7°C (80.1°F), exhibiting a slight fluctuation from the previous month. During the nights in September, an average low-temperature of 16.9°C (62.4°F) is observed.Humidity
In Sesimbra, the average relative humidity in September is 66%.Rainfall
In Sesimbra, Portugal, during September, the rain falls for 4.8 days and regularly aggregates up to 15mm (0.59") of precipitation. In Sesimbra, during the entire year, the rain falls for 100.8 days and collects up to 338mm (13.31") of precipitation.Sea temperature
In September, the average sea temperature is 19.8°C (67.6°F).Note: Most people do not take pleasure in swimming in water at 19.8°C (67.6°F). The difficulty of managing breathing increases as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Sesimbra, 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 is 9.3h.UV index
May 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 threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What is the average September temperature in Sesimbra?
What is the average humidity in September in Sesimbra?
How much does it rain in Sesimbra in September?
What is the sea temperature in September in Sesimbra?
What is the average length of the day in September in Sesimbra?
When is the sunrise / sunset in September in Sesimbra?
How long on average sun shines in September in Sesimbra?
What is the month with the highest UV index in Sesimbra?
What is the UV index reading in September in Sesimbra?
Average temperature in September
Sesimbra, Portugal
- Average high temperature in September: 26.7°C
The warmest month (with the highest average high temperature) is August (28.8°C).
The month with the lowest average high temperature is January (14.8°C).
- Average low temperature in September: 16.9°C
The month with the highest average low temperature is July (17.3°C).
The coldest month (with the lowest average low temperature) is February (9.1°C).
Average pressure in September
Sesimbra, Portugal
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Sesimbra, Portugal
- Average wind speed in September: 11.6km/h
The windiest month (with the highest average wind speed) is February (14.8km/h).
The calmest month (with the lowest average wind speed) is September (11.6km/h).
Average humidity in September
Sesimbra, Portugal
- Average humidity in September: 66%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (64%).
Average rainfall in September
Sesimbra, Portugal
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is November (55mm).
The driest months (with the least rainfall) are July and August (2mm).
Average rainfall days in September
Sesimbra, Portugal
- Average rainfall days in September: 4.8 days
The month with the highest number of rainy days is November (13.3 days).
The month with the least rainy days is August (1.7 days).
Average sea temperature in September
Sesimbra, Portugal
- Average sea temperature in September: 19.8°C
The best month for swimming (with the highest average sea temperature) is October (19.9°C).
The coldest month (with the lowest average sea temperature) is March (15.3°C).
Average daylight in September /
Average sunshine in September
Sesimbra, 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
Sesimbra, Portugal
- Average sunshine days in September: 23.9 days
The month with the most sunshine days is August (28 days).
The month with the least sunshine days is November (14.9 days).
Average UV index in September
Sesimbra, 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, April, November and December (UV index 4).
Average cloud cover in September
Sesimbra, 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 12).
Average visibility in September
Sesimbra, 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).
Sesimbra, Portugal
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