Sintra weather in September (Lisbon Region, Portugal)

Planning a trip to Sintra in September? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.

In Sintra, September is characterized by high temperatures and moderate rainfall. Throughout the daytime, temperatures often hover around 23°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 18°C.

Sintra in September usually receives moderate rainfall, averaging around 32 mm for the month. Based on our climate data of the past 30 years, about 6 days of rain are anticipated.

The days are predominantly sunny, with an estimated total of around 278 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Sintra. June, July, August, September and October typically offer the most agreeable circumstances. On the other hand, January, February, March and December tend to be characterized by conditions that may not be as optimal.

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

 

Sintra, monthly averages in September

Min Temperature 18°C  

Max Temperature 23°C  

Chance of Rain 21%  

Precipitation 32 mm  

Rainy days 6 days  

Humidity 75% *  

Sunshine 278 hours *  

Percentage Sunshine 75% *  

* Data from: Cascais, Portugal (11 KM, 7 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 Sintra in September?

For visitors traveling to Sintra, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings.

What To Do

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

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

10/10

Outdoor sports

10/10

Interested in more climate information?

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

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.