The temperatures in Porto in September are comfortable with low of 16°C and and high up to 26°C.
You can expect about 3 to 8 days of rain in Porto during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Porto in September 2025.
If you’re planning to visit Porto in the near future, we highly recommend that you review the 14 day weather forecast for Porto before you arrive.
Temperatures
26° / 16°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
65
mm
Sun Hours
11.2
Hrs
