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December in Idanha-a-Velha brings moderate temperatures, with highs of 14°C (57°F) and nights dropping to 5°C (41°F). Rainfall is on the higher side this month, averaging around 97 mm (3.8 in), so keep a rain jacket handy.
For Idanha-a-Velha itself, April, May and September generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Pick a month to see the average temperature, rainfall and sunshine in Idanha-a-Velha - and find the best time to visit.
46-year average (1976-2025)
Based on our historical records, temperatures in Idanha-a-Velha typically stay consistent throughout December, with daily highs averaging around 14°C (57°F). Nights are cold, with lows around 4°C (39°F).
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Idanha-a-Velha spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
According to our 29 years of weather records for Idanha-a-Velha, the following extremes were recorded between 1996 and 2025.
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in December →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Pack for changing conditions in Idanha-a-Velha in December. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Idanha-a-Velha climate overview or explore weather in Portugal.
Where to go in December - average daytime high across popular destinations.
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