Cool
Average highs are around 14°C, so pack for cooler days.
December verdict
Porto, Portugal in December
Weather score15Poor
Poor for holiday weather
Average highs are around 14°C, so pack for cooler days. Sunshine averages 3.9h per day, so this is not one of the brighter months. Rainfall averages 171mm, so some wet days are possible.
December weather
Monthly averages
Temp
14°C
Rain
171mm
Sun
3.9h
Sea
14°C
Weather score
15
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 171mm, so some wet days are possible.
Limited sun
Sunshine averages 3.9h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 14°C, so the water can feel cool.
Map
Weather map
Compare Porto, Portugal with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December14°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
December171mm average rain
December is one of Porto's wettest months, so rain is likely to be a major planning factor.
Driest monthsJune to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December3.9 hours average sun
December is one of Porto's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December14°C average sea
December is below Porto's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJune to October
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
December15 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
