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
São Martinho's average high-temperature in September is an agreeable 22.8°C (73°F), indicating a subtle variation from August. São Martinho sees a minor drop to an average minimum temperature of 21.7°C (71.1°F) during the night in the month of September.Humidity
In September, the average relative humidity is 76%.Rainfall
In São Martinho, in September, it is raining for 6.9 days, with typically 10mm (0.39") of accumulated precipitation. In São Martinho, during the entire year, the rain falls for 116.4 days and collects up to 232mm (9.13") of precipitation.Daylight
In September, the average length of the day in São Martinho, Portugal, is 12h and 22min.On the first day of the month, sunrise is at 07:42 and sunset at 20:32. On the last day of September, sunrise is at 08:01 and sunset at 19:53 WEST.
Sunshine
In São Martinho, the average sunshine in September is 8.9h.UV index
The months with the highest UV index are July through October, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 6 in September leads to these guidelines:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What is the average September temperature in São Martinho?
What is the average humidity in September in São Martinho?
How much does it rain in São Martinho in September?
How many hours of daylight does São Martinho have in September?
When are sunrise and sunset in September in São Martinho?
How many hours of sunshine does São Martinho have in September?
What are the months with the highest UV index in São Martinho?
What is the UV index intensity in September in São Martinho?
Average temperature in September
São Martinho, 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
São Martinho, 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
São Martinho, 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
São Martinho, 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
São Martinho, 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
São Martinho, 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 daylight in September /
Average sunshine in September
São Martinho, 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
São Martinho, 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
São Martinho, 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
São Martinho, 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
São Martinho, 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).
São Martinho, Portugal
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