Porto weather in December 2026

Q: How warm is it in Porto in December?

Daytime temperatures usually reach 15°C in Porto in December, falling to 9°C at night.

Q: How sunny is it in Porto in December?

There are normally 5 hours of bright sunshine each day in Porto in December - that's 48% of daylight hours.

Q: How warm is the sea around Porto in December?

The average sea temperature around Porto in December is 16°C.

Q: Does it rain in Porto in December?

There are usually 14 days with some rain in Porto in December and the average monthly rainfall is 106mm.

Expect daytime maximum temperatures of 57°F in Porto, Portugal in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 15 days with some rainfall and typically 6.7 inches of rainfall in the month.

57
57°F max day temperature
4
4 hours of sunshine per day
15
15 days with some rainfall
43
43°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
6.7
6.7 inches of monthly rainfall
1
1 (Low) UV index
57
57°F sea temperature

More about Porto

Porto by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Portugal

Travelsphere: up to £800 off worldwide holidays

Sale

Save up to £800 per couple on selected worldwide tours
Plus save up to £300 per couple on European tours
Book tours online in Travelsphere New Year sale

Go to Travelsphere deal >>

Expires at 23:59 on Saturday 28th Feb 2026 · View all Travelsphere offers

The December weather guide for Portugal (Porto) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)