Temperatures in September
It's warm in September in São Martinho do Porto with an average temperature of 25°C. Temperatures this month range from a low of 23°C to a high of 27°C. At night, you can expect temperatures between 14°C and 18°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for São Martinho do Porto in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in São Martinho do Porto with warm temperatures, averaging around 26°C during the day and nights close to 17°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-September
By mid-September, the average daytime temperature drops to around 25°C, with nights close to 17°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of September
By the end of September, the average daytime temperature in São Martinho do Porto will be around 24°C, with nights close to 16°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.
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Water temperature
The water temperature at São Martinho do Porto is 22°C this month. Pleasant for a swim.
Precipitation in September
In September, there is an average of 40 mm of precipitation, spread over 5 days. The wind speed is around 4 Bft, mostly coming from the West.
The precipitation chance averages 16% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for São Martinho do Porto. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
São Martinho do Porto in September |
London | ||
|---|---|---|---|
 Average Temperature |
25°C | 20°C | |
 High Temp |
27°C | 22°C | |
| Low Temp |
23°C | 17°C | |
 Total Precipitation |
40 mm | 44 mm | |
| Rainy Days |
5 days | 8 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit São Martinho do Porto?
Want nice weather? Then September is a great time to be in São Martinho do Porto. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for São Martinho do Porto in September
With 39°C, São Martinho do Porto hit the highest temperature in the last 10 years in September 2016. The lowest daytime temperature in this month was 16°C in 2015. The extreme night temperatures ranged from a low of 8°C to a high of 21°C.
Check out the climate of São Martinho do Porto for all months and discover the best travel time
Curious about the climate in other parts of Portugal? Check out the weather and climate in places like Algarve, Lisbon, Albufeira, or have a look at other destinations in Portugal.
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Daily Temperature in September in São Martinho do Porto
This chart shows the average daily temperatures, both day and night, for each day in September in São Martinho do Porto, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in São Martinho do Porto
The chart below shows the average daily precipitation in September for São Martinho do Porto, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 5 days of rain in São Martinho do Porto.
Daily UV Index in September in São Martinho do Porto
This chart shows the average daily UV index in September in São Martinho do Porto, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in São Martinho do Porto Over the Years
This chart shows the average temperature in September in São Martinho do Porto, measured in degrees Celsius, over the past years.
Total Precipitation in September in São Martinho do Porto Over the Years
This chart shows the average precipitation in September in São Martinho do Porto, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for São Martinho do Porto
Click on a specific day in September for detailed info on the typical weather on that day in São Martinho do Porto. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in São Martinho do Porto
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Average Weather in São Martinho do Porto by Month
Click on a month below to see detailed weather info for São Martinho do Porto. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of São Martinho do Porto for all months at once
