Viana do Castelo Weather in January
With daytime temperatures of 14°C (57°F) and nighttime lows of 8°C (46°F), January in Viana do Castelo brings moderate temperatures during the day. Do keep in mind that January is part of the rainy season, with frequent and often heavy rainfall.
Rainfall in Viana do Castelo in January
As part of the rainy season, Viana do Castelo sees around 19 days of rain in January, with an average of 207 mm (8.1 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.
Temperature in Viana do Castelo in January
In January, Viana do Castelo gets moderate temperatures, with highs of 14°C (57°F). Nights cool to around 8°C (46°F). January is a notable month of the winter season. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep. Expect the coolest temperatures of the year during January.
Sunshine in Viana do Castelo in January
The area experiences a moderate amount of sunshine, with approximately 122 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Viana do Castelo. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Viana do Castelo's climate page.
Viana do Castelo Temperature in January
Min Temperature
8°C (46°F)
Max Temperature
14°C (57°F)
Chance of Rain
63%
Precipitation
207 mm (8.1 in)
Rainy days
19 days
Humidity
81% *
Sunshine
122 hours *
Percentage Sunshine
48% *
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Viana do Castelo typically stay consistent throughout January, with daily highs averaging around 14°C (57°F). Nights are cold, with lows around 6°C (43°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Viana do Castelo in January
Browse day-by-day weather records for Viana do Castelo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Viana do Castelo historical weather extremes in January
Our historical data for Viana do Castelo spans 2000 to 2025, revealing these weather extremes.
- The hottest January day on record in Viana do Castelo reached 23°C (73°F) (January 27, 2003).
- On January 9, 2009, Viana do Castelo saw its coldest January day with temperatures maxing out at 4°C (39°F).
- Viana do Castelo registered its coldest January night on January 31, 2006, with temperatures dropping to -3°C (27°F).
- The wettest January day on record brought 66 mm (2.6 in) of precipitation to Viana do Castelo (January 10, 2016).
Best Places in Portugal in January
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in January →
perfect weather
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tolerable
unpleasant
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What to Wear in Viana do Castelo in January
The weather can swing between comfortable and chilly in January, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. It's going to pour! Pack a good poncho and prepare for very wet conditions. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Viana do Castelo in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Viana do Castelo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Viana do Castelo climate overview or explore weather in Portugal.
