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
Porto Martins, Portugal, notes an average high-temperature of a still agreeable 22.3°C (72.1°F) in September, displaying minor variation from August. September nights in Porto Martins reflect a consistent temperature dip to a still pleasant 20.9°C (69.6°F), a slight descent from daytime peaks.Humidity
The average relative humidity in September is 78%.Rainfall
In Porto Martins, in September, it is raining for 14.2 days, with typically 34mm (1.34") of accumulated precipitation. Throughout the year, there are 175.5 rainfall days, and 542mm (21.34") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September in Porto Martins, sunrise is at 07:17 and sunset at 20:18. On the last day of the month, sunrise is at 07:43 and sunset at 19:32 +00.
Sunshine
In September, the average sunshine is 7.9h.UV index
The average daily maximum UV index in September in Porto Martins is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What is the temperature in September in Porto Martins?
What is the average humidity in September in Porto Martins?
How many days does it rain in September in Porto Martins?
How many hours of daylight does Porto Martins have in September?
When are sunrise and sunset in September in Porto Martins?
How many hours of sunshine does Porto Martins have in September?
What is the UV index intensity in September in Porto Martins?
Average temperature in September
Porto Martins, Portugal
- Average high temperature in September: 22.3°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is March (15.6°C).
- Average low temperature in September: 20.9°C
The month with the highest average low temperature is August (21.6°C).
The coldest months (with the lowest average low temperature) are February and March (14.3°C).
Average pressure in September
Porto Martins, Portugal
- Average pressure in September: 1021mbar
The month with the highest atmospheric pressure is July (1024.4mbar).
The month with the lowest atmospheric pressure is October (1016.6mbar).
Average wind speed in September
Porto Martins, Portugal
- Average wind speed in September: 21.1km/h
The windiest month (with the highest average wind speed) is December (29.8km/h).
The calmest month (with the lowest average wind speed) is July (16.6km/h).
Average humidity in September
Porto Martins, Portugal
- Average humidity in September: 78%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is November (77%).
Average rainfall in September
Porto Martins, Portugal
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is December (94mm).
The driest month (with the least rainfall) is July (15mm).
Average rainfall days in September
Porto Martins, Portugal
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is October (19.5 days).
The month with the least rainy days is July (9 days).
Average daylight in September /
Average sunshine in September
Porto Martins, 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: 7h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is November (Average sunshine: 5h and 0min).
Average sunshine days in September
Porto Martins, Portugal
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is July (18.1 days).
The month with the least sunshine days is October (6.6 days).
Average UV index in September
Porto Martins, Portugal
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, April and December (UV index 4).
Average cloud cover in September
Porto Martins, Portugal
- Average cloud cover in September: 41
The month with the most cloud cover is November (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Porto Martins, 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).
Porto Martins, Portugal
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