Sintra (Cacém)
December
Weather in Sintra for December 2026
Your guide to Sintra weather in December - trends and predictions
In general, the average temperature in Sintra at the beginning of December is 16.7 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 15 °C by the end of December.
Sintra experiences moderate rainfall in December, with an average of 9 rainy days and a total precipitation of 31.8 mm.
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Temperatures
Rain 🌧️
More
22
Dry days
9
Rainy days
0
Snow days
16°/10°
Temperatures
17 km/h
Avg max wind
71 %
Avg humidity
Sintra Weather December
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Temperatures trend during December in Sintra
See the weather trend as well as the moving average line
December weather in Sintra day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy rain possible | 17° /11° | 0.5 mm | 4 | |
| 2 Dec. | Patchy rain possible | 17° /11° | 3.1 mm | 4 | |
| 3 Dec. | Patchy rain possible | 16° /10° | 1 mm | 4 | |
| 4 Dec. | Patchy rain possible | 17° /12° | 3.2 mm | 4 | |
| 5 Dec. |  Light rain | 16° /11° | 2.3 mm | 4 | |
| 6 Dec. |  Overcast | 17° /11° | 0 mm | 4 | |
| 7 Dec. | Light rain shower | 17° /12° | 1.9 mm | 4 | |
| 8 Dec. | Patchy rain possible | 16° /11° | 0.1 mm | 4 | |
| 9 Dec. | Patchy rain possible | 16° /11° | 6.5 mm | 4 | |
| 10 Dec. |  Partly cloudy | 16° /10° | 0 mm | 5 | |
| 11 Dec. |  Mist | 15° /9° | 0.2 mm | 3 | |
| 12 Dec. | Patchy rain possible | 15° /10° | 9.1 mm | 4 | |
| 13 Dec. | Patchy rain possible | 15° /9° | 3.1 mm | 4 | |
| 14 Dec. |  Sunny | 15° /9° | 0.6 mm | 4 | |
| 15 Dec. | Partly cloudy | 14° /8° | 3.9 mm | 4 | |
| 16 Dec. | Sunny | 15° /8° | 6.1 mm | 4 | |
| 17 Dec. | Sunny | 16° /9° | 0 mm | 4 | |
| 18 Dec. | Sunny | 16° /9° | 0.8 mm | 4 | |
| 19 Dec. | Sunny | 15° /10° | 4.3 mm | 4 | |
| 20 Dec. | Patchy rain possible | 15° /9° | 0.9 mm | 3 | |
| 21 Dec. | Sunny | 14° /7° | 2.5 mm | 3 | |
| 22 Dec. | Sunny | 17° /9° | 1 mm | 4 | |
| 23 Dec. | Sunny | 16° /9° | 0.6 mm | 4 | |
| 24 Dec. | Patchy rain possible | 15° /8° | 0.4 mm | 3 | |
| 25 Dec. |  Moderate or heavy rain shower | 15° /9° | 6.8 mm | 3 | |
| 26 Dec. | Moderate rain at times | 15° /8° | 0.9 mm | 3 | |
| 27 Dec. | Sunny | 15° /8° | 3.5 mm | 3 | |
| 28 Dec. |  Cloudy | 15° /10° | 0.6 mm | 3 | |
| 29 Dec. | Sunny | 15° /9° | 1 mm | 3 | |
| 30 Dec. | Partly cloudy | 15° /9° | 0 mm | 4 | |
| 31 Dec. | Sunny | 15° /9° | 0.2 mm | 3 | |
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Important Notice
Our weather forecast for Sintra in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sintra forecast closer to your planned date for the most up-to-date weather information.
Change Month
Sintra weather in December vs November vs January
Compare December weather in Sintra with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| November | December | January | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 19°/13° | 16°/10° | 15°/9° |
| Rainfall | 56 mm | 32 mm | 89 mm |
| Wind | 17.8 km/h | 16.9 km/h | 19.6 km/h |
| Humidity | 72% | 71% | 76% |
| Rainy days | 12 days | 9 days | 22 days |
| Dry days | 18 days | 22 days | 9 days |
Planning a trip to Sintra? Discover the best time to visit
Sintra in December - FAQ
What are the expected maximum and minimum temperatures in Sintra during December?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sintra during December?
In December, Sintra can expect light to moderate rainfall, totaling 31.8 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Sintra during December?
The average wind speed in Sintra during December is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Sintra in December?
As you prepare for your trip to Sintra in December, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Sintra, during December, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
December rainfall patterns in Sintra
Explore the daily rainfall trends and prepare for Sintras December weather 💧
Typically, Sintra has 9 rainy days in December with a total of 31.8 mm of rainfall.
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