Viana do Castelo in December
5.2out of 10
Not the best time
Cool: highs only around 13°C. Frequent rain: about 14 rainy days.
13°CAvg high
8°CAvg low
14Rainy days (227 mm)
8:59 hDaylight
08:02Sunrise · 17:01 Sunset
Why this score
- Cool: highs only around 13°C
- Frequent rain: about 14 rainy days
- Rain varies a lot between years (±6.2 days)
What to wear and pack
- A warm jacket
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in December varies a lot between years (±6.2 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 13°C | 7°C | 218 mm | 14 | – | – | 5.1 |
| February | 14°C | 7°C | 143 mm | 10 | – | – | 6.1 |
| March | 15°C | 8°C | 165 mm | 11 | – | – | 6.2 |
| April | 16°C | 10°C | 154 mm | 13 | – | – | 6.1 |
| May | 19°C | 12°C | 133 mm | 12 | – | – | 6.7 |
| June | 21°C | 14°C | 56 mm | 7 | – | – | 8.1 |
| July | 23°C | 16°C | 32 mm | 4 | – | – | 8.5 |
| August | 24°C | 16°C | 45 mm | 5 | – | – | 8.4 |
| September | 22°C | 15°C | 89 mm | 7 | – | – | 8.1 |
| October | 19°C | 12°C | 232 mm | 13 | – | – | 6.2 |
| November | 15°C | 9°C | 232 mm | 14 | – | – | 5.4 |
| December | 13°C | 8°C | 227 mm | 14 | – | – | 5.2 |
Frequently asked questions
How hot is Viana do Castelo in December?
Daytime highs average 13°C and nights about 8°C.
When is the best time to visit Viana do Castelo?
The best months are July, August, June, September.