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
September
Weather in September
Temperature
The advent of September signifies a minor shift to an average high-temperature of a still moderately hot 25.8°C (78.4°F), aligning closely with August. During September, São Marcos da Serra records a consistent average nighttime temperature of 17.9°C (64.2°F).Humidity
The average relative humidity in September is 68%.Rainfall
In São Marcos da Serra, during September, the rain falls for 3.9 days and regularly aggregates up to 6mm (0.24") of precipitation. Throughout the year, in São Marcos da Serra, there are 85.4 rainfall days, and 164mm (6.46") of precipitation is accumulated.Daylight
The average length of the day in September in São Marcos da Serra, Portugal, is 12h and 25min.On the first day of the month, sunrise is at 07:04 and sunset at 20:02. On the last day of September, in São Marcos da Serra, sunrise is at 07:28 and sunset at 19:18 WEST.
Sunshine
The average sunshine in September is 9.5h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in São Marcos da Serra?
What is the average humidity in September in São Marcos da Serra?
How much does it rain in São Marcos da Serra in September?
How many hours of daylight does São Marcos da Serra have in September?
When are sunrise and sunset in September in São Marcos da Serra?
How many hours of sunshine does São Marcos da Serra have in September?
When is the highest UV index in São Marcos da Serra?
How high is the UV index in September in São Marcos da Serra?
Average temperature in September
São Marcos da Serra, Portugal
- Average high temperature in September: 25.8°C
The warmest month (with the highest average high temperature) is August (27.8°C).
The month with the lowest average high temperature is January (14.5°C).
- Average low temperature in September: 17.9°C
The month with the highest average low temperature is August (18.4°C).
The coldest month (with the lowest average low temperature) is February (9.2°C).
Average pressure in September
São Marcos da Serra, Portugal
- Average pressure in September: 1016.7mbar
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
São Marcos da Serra, Portugal
- Average wind speed in September: 11.2km/h
The windiest month (with the highest average wind speed) is February (16.1km/h).
The calmest month (with the lowest average wind speed) is September (11.2km/h).
Average humidity in September
São Marcos da Serra, Portugal
- Average humidity in September: 68%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (65%).
Average rainfall in September
São Marcos da Serra, Portugal
- Average rainfall in September: 6mm
The wettest month (with the highest rainfall) is November (25mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in September
São Marcos da Serra, Portugal
- Average rainfall days in September: 3.9 days
The month with the highest number of rainy days is March (12.2 days).
The month with the least rainy days is August (1.5 days).
Average daylight in September /
Average sunshine in September
São Marcos da Serra, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in September
São Marcos da Serra, Portugal
- Average sunshine days in September: 24.4 days
The month with the most sunshine days is July (28.6 days).
The month with the least sunshine days is April (15.3 days).
Average UV index in September
São Marcos da Serra, 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 month with the lowest UV index is January (UV index 3).
Average cloud cover in September
São Marcos da Serra, Portugal
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in September
São Marcos da Serra, 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).
