Viana do Castelo weather in January
Temperature, sea and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Poor
Best time to visit: July – August
What is the weather like in Viana do Castelo in January?
In January, Viana do Castelo is cool: daytime highs average 13 °C, and nights cool down to about 8 °C. The sea averages 13.9 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain is frequent, with about 13 rainy days and 178 mm in total. All in all, January is not an ideal month for a holiday in Viana do Castelo.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 8 | 10 | 18 |
| Day | 14° | 13° | 14° |
| Night | 9° | 8° | 8° |
| Sea | 15° | 14° | 13° |
| Sun | 4 h | 4 h | 5 h |
| Rain days | 14 | 13 | 10 |
More details for January
- Daylight
- 9 h 28 min08:00 – 17:28
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 22 km/haverage daily peakAll months
- Cloud cover
- 59 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+0Europe/Lisbon
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %13 %
- Few rainy daysweight 20 %34 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in January
- A jumper for the evenings
- Rain jacket or umbrella
Viana do Castelo in January: quick answers
Is Viana do Castelo hot in January?
No. In January, Viana do Castelo is cool: daytime highs average 13 °C and nights drop to about 8 °C.
Can you swim in Viana do Castelo in January?
Only if you don't mind cold water: in January the sea averages just 13.9 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Viana do Castelo in January?
Rain is frequent, with about 13 rainy days and 178 mm in total.
Viana do Castelo month by month
The whole year in Viana do CasteloAll destinations: PortugalWhere to go in JanuarySea temperature in January
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences