São Luis weather in September (Alentejo, Portugal)

What can you expect from the weather in São Luis during September? Check out this comprehensive weather guide.

In São Luis, September is characterized by high temperatures and low rainfall. September falls within the summer season. Throughout the daytime, temperatures often hover around 27°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 17°C.

São Luis in September usually receives low rainfall, averaging around 28 mm for the month. Based on our climate data of the past 30 years, about 4 days of rain are anticipated.

With around 270 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

So this is a great month to visit if you prefer dry days with pleasant temperatures. April, May, June, July, August, September and October typically offer the most optimal weather. In contrast, January, February and December tend to have less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized São Luis climate page with graphs.

 

São Luis, monthly averages in September

Min Temperature 17°C  

Max Temperature 27°C  

Chance of Rain 12%  

Precipitation 28 mm  

Rainy days 4 days  

Humidity 68% *  

Sunshine 270 hours *  

Percentage Sunshine *  

* Data from: Praia da Rocha, Portugal (62 KM, 38 Miles).

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.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in São Luis in September?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool.

What To Do

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

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Interested in more climate information?

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

Our site offers climate and forecast data for every country 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 recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.