The climate in Portimão during September can be summarized as warm and dry.
September is in the fall / autumn in Portimão and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 18°C (64°F) is normal.
|Daytime temperature||25.8°C 78.4°F|
|Nightly temperature||17.6°C 63.7°F|
|Average temperature||21.7°C 71.1°F|
|Daily sunshine||9.5 hrs|
|Avg rainfall||15 mm 0.6 ins|
|Rainy days||3 days|
|Sea temperature||21°C 69.9°F|
|Windspeed||13kph 8 mph|
On average September is the 3rd driest month of the year in Portimão with around 15mm 0.6 inches of rain making it a dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.5 hours of sunshine per day.
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 Portimão in September 2023.
|Hottest month:||August||26.1°C 79°F|
|Driest month:||July||1mm 0ins|
|Coldest month:||January||15.4°C 59.7°F|
|Wettest month:||December||99mm 3.9ins|