Weather in Porto for December 2025
Yellow Maritime Agitation Warning - See hour by hour.
Until now, December 2025 in Porto has been nearly identical to the historical average, with a temperature of 14.1 °C (showing only a slight deviation of -0.3 °C).
Expect cooler weather in the next days in Porto with the forecast suggesting a temperature of 11.9 °C, lower than the historical average.
In general, the average temperature in Porto at the beginning of December is 14.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11.1 °C by the end of December.
Porto experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 195.6 mm.
Is December a good time to visit Porto? check out the best time to travel to Porto page.
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Porto Weather December
Temperatures trend during December in Porto
December weather in Porto day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Light rain shower | 14° /9° | 3.3 mm | 4 | |
| 2 Dec. |  Sunny | 14° /9° | 4.2 mm | 4 | |
| 3 Dec. |  Overcast | 14° /7° | 2.2 mm | 4 | |
| 4 Dec. | Patchy rain possible | 14° /10° | 3.2 mm | 3 | |
| 5 Dec. | Patchy rain possible | 14° /10° | 4.3 mm | 4 | |
| 6 Dec. |  Moderate rain at times | 15° /10° | 2.5 mm | 4 | |
| 7 Dec. | Patchy rain possible | 15° /11° | 15.1 mm | 4 | |
| 8 Dec. | Moderate rain at times | 14° /10° | 4.9 mm | 3 | |
| 9 Dec. | Light rain shower | 14° /11° | 8.3 mm | 4 | |
| 10 Dec. | Patchy rain possible | 14° /10° | 6.8 mm | 4 | |
| 11 Dec. | Patchy rain possible | 14° /9° | 6.4 mm | 4 | |
| 12 Dec. | Overcast | 15° /9° | 16.2 mm | 4 | |
| 13 Dec. | Patchy rain possible | 15° /10° | 7.9 mm | 4 | |
| 14 Dec. | Moderate or heavy rain shower | 15° /10° | 6.3 mm | 4 | |
| 15 Dec. | Sunny | 15° /9° | 2.7 mm | 4 | |
| 16 Dec. | Patchy rain possible | 13° /10° | 1.2 mm | 0.2 | |
| 17 Dec. |  Partly cloudy | 14° /8° | 0 mm | 0.3 | |
| 18 Dec. |  Heavy rain | 15° /11° | 21.9 mm | 0.1 | |
| 19 Dec. |  Moderate rain | 14° /10° | 5.9 mm | 0.2 | |
| 20 Dec. | Patchy rain possible | 13° /10° | 1.7 mm | 0.2 | |
| 21 Dec. | Patchy rain possible | 11° /9° | 1.8 mm | 2 | |
| 22 Dec. | Patchy rain possible | 12° /9° | 4.7 mm | 3 | |
| 23 Dec. | Patchy rain possible | 13° /10° | 0.6 mm | 3 | |
| 24 Dec. | Sunny | 13° /7° | 0 mm | 3 | |
| 25 Dec. | Partly cloudy | 10° /7° | 0 mm | 3 | |
| 26 Dec. | Patchy rain possible | 9° /8° | 1.5 mm | 2 | |
| 27 Dec. | Moderate rain | 9° /7° | 6.9 mm | 2 | |
| 28 Dec. | Patchy rain possible | 10° /8° | 3.8 mm | 2 | |
| 29 Dec. | Patchy rain possible | 11° /9° | 1.6 mm | 2 | |
| 30 Dec. | Sunny | 14° /9° | 5.3 mm | 4 | |
| 31 Dec. |  Heavy rain at times | 15° /9° | 6.4 mm | 4 | |
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Porto weather in December vs November vs January
| November | December | January | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 17°/12° | 14°/10° | 13°/8° |
| Rainfall | 153 mm | 196 mm | 169 mm |
| Wind | 17.6 km/h | 18.9 km/h | 18.5 km/h |
| Humidity | 72% | 75% | 72% |
| Rainy days | 27 days | 28 days | 30 days |
| Dry days | 3 days | 3 days | 1 days |
Planning a trip to Porto? Discover the best time to visit
Porto in December - FAQ
What to pack to Porto in December?
As you prepare for your trip to Porto 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 Porto, 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 Porto
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