Cascais Weather in September

What's the weather like in Cascais, Portugal in September 2019?

The climate in Cascais during September can be summarized as warm and reasonably dry.

September is in the fall / autumn in Cascais and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 17°C (62°F) is normal.

Cascais weather averages (imperial / metric)
Daytime temperature 25.6°C 78.1°F
Nightly temperature 16.6°C 61.9°F
Average temperature 21.1°C 70°F
Daily sunshine 9.2 hrs
Avg rainfall 31 mm 1.2 ins
Rainy days 6 days
Sea temperature 20.4°C 68.7°F
Humidity 69%
Windspeed 12.6kph 8 mph

On average September is the 4th driest month of the year in Cascais with around 31mm 1.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.2 hours of sunshine per day.

September temperatures in Cascais

September rainfall

September hourly sunshine

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in September 2019.

Other monthly averages

UV index

Cascais weather stats

Cascais weather statistics
Hottest month: August 26.6°C 79.9°F
Driest month: July 7mm 0.3ins
Sunniest month: August 11.6hrs
Coldest month: January 14.2°C 57.6°F
Wettest month: January 123mm 4.8ins
Map showing location of Cascais (38.6979, -9.42146)

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