Porto weather in September (Norte Region, Portugal)

You can expect very pleasant temperatures during the day in September. The average maximum daytime temperature in Porto in September lies at 24.6°C (76.28°F). The average minimum temperature goes down to around 12.8°C (55.04°F) (often the minimum temperature is noted at night).

Rainfall during September is moderate with an average of 62mm (2.4 inches). There are generally around 9 rainy days. If you enjoy blue skies and sunshine, then this is a great time to go to Porto with 224 hours of sun during the entire month. September is known as one of the best months to visit Porto.


Porto, monthly averages in September

Show in Fahrenheit
Min Temperature 12 °C  
Max Temperature 24 °C  
Water Temperature 18 °C *  
Chance of Rain 33%  
Precipitation 61mm  
Rainy days 10 days  
Humidity 76% *  
Sunshine 224 hrs *  
Percentage Sunshine 64% *  

Where to stay in Porto

Where to go in Portugal in September

Find out more about the weather in Portugal in September and which places have the best weather conditions in this month.

Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in September? Bring a rain jacket in case it rains during your stay. Also bring your shorts or a skirt because it can be very warm or even hot. At night it tends to cool off so best to pack some warm nightwear as well. With a water temperature of around 18.0°C (64.4°F), there is no need to bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Outdoor sports

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Porto.

Our site offers climate and forecast data for almost all countries in the world. Are you going to Portugal? On this website you can find historical weather averages for many cities in Portugal. Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.