Porto weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Fair
Best time to visit: June – September
What is the weather like in Porto in December?
In December, Porto is cool: daytime highs average 14 °C, and nights cool down to about 7 °C. The sea averages 14.3 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 169 mm in total. All in all, December is a so-so month for a holiday in Porto.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 54 | 42 | 41 |
| Day | 16° | 14° | 13° |
| Night | 10° | 7° | 6° |
| Sea | 16° | 14° | 14° |
| Sun | 5 h | 4 h | 4 h |
| Rain days | 13 | 13 | 13 |
More details for December
- Daylight
- 9 h 14 min07:52 – 17:07
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 18 km/haverage daily peak
- Cloud cover
- 63 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+0Europe/Lisbon
How the score comes together
- Temperatureweight 50 %55 %
- Sunshineweight 20 %18 %
- Few rainy daysweight 30 %35 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- A jumper for the evenings
- Rain jacket or umbrella
Porto in December: quick answers
Is Porto hot in December?
No. In December, Porto is cool: daytime highs average 14 °C and nights drop to about 7 °C.
Can you swim in Porto in December?
Only if you don't mind cold water: in December the sea averages just 14.3 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Porto in December?
Rain is frequent, with about 13 rainy days and 169 mm in total.
Porto month by month
The whole year in PortoAll destinations: PortugalWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)