Sintra weather in December
Temperature, rain 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: May – September
What is the weather like in Sintra in December?
In December, Sintra is cool: daytime highs average 14 °C, and nights cool down to about 10 °C. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 83 mm in total. All in all, December is a so-so month for a holiday in Sintra.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 65 | 55 | 52 |
| Day | 16° | 14° | 14° |
| Night | 12° | 10° | 9° |
| Sun | 5 h | 5 h | 5 h |
| Rain days | 10 | 10 | 9 |
More details for December
- Daylight
- 9 h 28 min07:48 – 17:17
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 55 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+0Europe/Lisbon
How the score comes together
- Temperatureweight 50 %63 %
- Sunshineweight 20 %27 %
- Few rainy daysweight 30 %61 %
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
Sintra in December: quick answers
Is Sintra hot in December?
No. In December, Sintra is cool: daytime highs average 14 °C and nights drop to about 10 °C.
Does it rain much in Sintra in December?
Rain is frequent, with about 10 rainy days and 83 mm in total.
Sintra month by month
The whole year in SintraAll destinations: PortugalWhere to go 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). Sources & licences