Cascais weather in September (Lisbon Region, Portugal)

How is the weather in Cascais 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 Cascais, September is characterized by pleasant temperatures and moderate rainfall. Anticipate daytime temperatures around 22°C, while night temperatures can drop to 18°C.

Cascais in September usually receives moderate rainfall, averaging around 31 mm for the month. Rain is expected on roughly 6 days.

The city usually sees around 278 hours of sunlight, indicating many sunny days.

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

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

 

Cascais, monthly averages in September

Min Temperature 18°C  

Max Temperature 22°C  

Chance of Rain 20%  

Precipitation 31 mm  

Rainy days 6 days  

Humidity 75%  

Sunshine 278 hours  

Percentage Sunshine 75%  

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 Cascais in September?

For visitors traveling to Cascais, 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 Cascais.

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.