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December in Santiago do Cacém sees daytime temperatures around 17°C (63°F) and lows of 9°C (48°F) at night. With around 78 mm (3.1 in) of rainfall expected, it's worth packing a rain jacket.
December in Santiago do Cacém can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Pick a month to see the average temperature, rainfall and sunshine in Santiago do Cacém - and find the best time to visit.
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).
Comfortable temperatures call for an easy wardrobe in December. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Bring sunglasses since you'll have some sunny periods throughout the month
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Santiago do Cacém climate overview or explore weather in Portugal.
Where to go in December - average daytime high across popular destinations.
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