São Luis Weather in September

September in São Luis brings high temperatures, with highs of 27°C (81°F) and nights dropping to 17°C (63°F). With perfect weather conditions overall, it's a good time to visit.

Rainfall in São Luis in September

Expect around 4 days of rain based on historical data, with 28 mm (1.1 in) average. Showers tend to be short but heavy rather than persistent drizzle. When it rains, it usually means it, but it doesn't last long.

Temperature in São Luis in September

If you're visiting São Luis in September, expect perfect temperatures with highs of 27°C (81°F) and overnight lows of 17°C (63°F). September marks the summer season. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 17°C (63°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in São Luis in September

With approximately 270 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit São Luis.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Portugal, check out our São Luis's climate page.

São Luis Temperature in September

Min Temperature 17°C (63°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 12%  

Precipitation 28 mm (1.1 in)  

Rainy days 4 days  

Humidity 68% *  

Sunshine 270 hours *  

Percentage Sunshine *  

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

What to Wear in São Luis in September

Warm but pleasant conditions in São Luis in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Light rain is possible, so consider bringing a small umbrella or rain jacket. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in São Luis in September

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

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Portugal, check out our São Luis's climate page.

More climate data for São Luis

Temperature Rainfall Sunshine Humidity

See the full São Luis climate overview or explore weather in Portugal.