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 ushering in of September brings an average high-temperature of an agreeable 22.8°C (73°F), closely mirroring the 23°C (73.4°F) of August. Ribeira Brava notes an average temperature descent to a still pleasant 21.7°C (71.1°F) in September, a small shift from its daytime peak.Humidity
In September, the average relative humidity is 76%.Rainfall
In Ribeira Brava, during September, the rain falls for 6.9 days and regularly aggregates up to 10mm (0.39") of precipitation. Throughout the year, there are 116.4 rainfall days, and 232mm (9.13") of precipitation is accumulated.Sea temperature
The months with the warmest seawater in Ribeira Brava are August through October, with an average sea temperature of 23°C (73.4°F).Note: People sensitive to cold might find swimming in 23°C (73.4°F) challenging. However, conditions like sunshine, wind, and ambient temperature play a significant role in the overall comfort. Wetsuits, while optional, might be beneficial.
Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 07:43 and sunset at 20:32. On the last day of September, sunrise is at 08:01 and sunset at 19:54 WEST.
Sunshine
In Ribeira Brava, the average sunshine in September is 8.9h.UV index
July through October, with an average maximum UV index of 6, are months with the highest UV index in Ribeira Brava. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely. Notice! The Sun's UV exposure elevates with sand and water reflections.
Frequently asked questions
What is the usual temperature for Ribeira Brava in September?
What is the average humidity in September in Ribeira Brava?
How much does it rain in Ribeira Brava in September?
What are the months with the warmest sea water in Ribeira Brava?
What is the water temperature in September in Ribeira Brava?
What is the average length of the day in September in Ribeira Brava?
When is the sunrise / sunset in September in Ribeira Brava?
How many hours of sunshine does Ribeira Brava have in September?
What are the months with the highest UV index in Ribeira Brava?
How high is the UV index in September in Ribeira Brava?
Average temperature in September
Ribeira Brava, Portugal
- Average high temperature in September: 22.8°C
The warmest month (with the highest average high temperature) is August (23°C).
The months with the lowest average high temperature are February and March (16.9°C).
- Average low temperature in September: 21.7°C
The month with the highest average low temperature is September (21.7°C).
The coldest month (with the lowest average low temperature) is March (15.1°C).
Average pressure in September
Ribeira Brava, Portugal
- Average pressure in September: 1019mbar
The month with the highest atmospheric pressure is January (1024.1mbar).
The month with the lowest atmospheric pressure is October (1017mbar).
Average wind speed in September
Ribeira Brava, Portugal
- Average wind speed in September: 17.7km/h
The windiest month (with the highest average wind speed) is February (23km/h).
The calmest month (with the lowest average wind speed) is September (17.7km/h).
Average humidity in September
Ribeira Brava, Portugal
- Average humidity in September: 76%
The months with the highest relative humidity are June and August (80%).
The month with the lowest relative humidity is February (73%).
Average rainfall in September
Ribeira Brava, Portugal
- Average rainfall in September: 10mm
The wettest month (with the highest rainfall) is October (44mm).
The driest month (with the least rainfall) is August (3mm).
Average rainfall days in September
Ribeira Brava, Portugal
- Average rainfall days in September: 6.9 days
The month with the highest number of rainy days is November (16 days).
The month with the least rainy days is August (3.9 days).
Average sea temperature in September
Ribeira Brava, Portugal
- Average sea temperature in September: 23°C
The best months for swimming (with the highest average sea temperature) are August, September and October (23°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (18°C).
Average daylight in September /
Average sunshine in September
Ribeira Brava, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is June (Average sunshine: 9h and 12min).
The months with the least sunshine are January and December (Average sunshine: 7h and 36min).
Average sunshine days in September
Ribeira Brava, Portugal
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is August (20.9 days).
The month with the least sunshine days is November (8.4 days).
Average UV index in September
Ribeira Brava, Portugal
- Average UV index in September: 6
The months with the highest UV index are July, August, September and October (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 5).
Average cloud cover in September
Ribeira Brava, Portugal
- Average cloud cover in September: 30
The month with the most cloud cover is November (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Ribeira Brava, 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).
Ribeira Brava, Portugal
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