The climate in Porto during May can be summarized as mild and a little damp.
May is in the spring in Porto and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 20°C (68°F), whilst at night 11°C (51°F) is normal.
|Daytime temperature||19.9°C 67.7°F|
|Nightly temperature||10.6°C 51°F|
|Average temperature||15.2°C 59.4°F|
|Daily sunshine||9.1 hrs|
|Avg rainfall||87 mm 3.4 ins|
|Rainy days||13 days|
|Sea temperature||15.5°C 59.8°F|
|Windspeed||16.2kph 10 mph|
On average May is the 5th driest month of the year in Porto with around 87mm 3.4 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.1 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 Porto in May 2023.
|Hottest month:||July||24.8°C 76.6°F|
|Driest month:||July||15mm 0.6ins|
|Coldest month:||January||13.3°C 55.9°F|
|Wettest month:||December||171mm 6.7ins|