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Viana do Castelo Weather in October
Viana do Castelo in October sees pleasant temperatures, with highs around 20°C (68°F) and overnight lows of 14°C (57°F). With the rainy season in full effect, expect around 215 mm (8.5 in) of rainfall and regular showers throughout the month.
Rainfall in Viana do Castelo in October
Viana do Castelo is in the rainy season in October, with rain on around 15 days and an average of 215 mm (8.5 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.
Temperature in Viana do Castelo in October
Temperatures in Viana do Castelo in October top out at 20°C (68°F) and drop to 14°C (57°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Viana do Castelo in October
With about 182 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.If you prefer dry days with pleasant temperatures, June, July, August and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Viana do Castelo Temperature in October
Min Temperature
14°C (57°F)
Max Temperature
20°C (68°F)
Chance of Rain
51%
Precipitation
215 mm (8.5 in)
Rainy days
15 days
Humidity
80% *
Sunshine
182 hours *
Percentage Sunshine
56% *
* Data from: Porto, Portugal (52 KM, 32 Miles).
Viana do Castelo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Viana do Castelo - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Viana do Castelo typically stay consistent throughout October, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 11°C (52°F) to 13°C (55°F).
Average temperatures in October
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in October
Historical weather records for Viana do Castelo in October
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 October
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Viana do Castelo.
- Viana do Castelo recorded its highest October temperature of 33°C (91°F) on October 2, 1980.
- The coldest October day was on October 31, 2018, with a maximum of 12°C (54°F).
- The coldest night in October in Viana do Castelo was on October 29, 2018, with a minimum of 2°C (36°F).
Best Places in Portugal in October
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in October →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Viana do Castelo in October
Comfortable temperatures call for an easy wardrobe in October. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Viana do Castelo in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Camping6/10
Viana do Castelo 3-Day Forecast
More climate data for Viana do Castelo
Temperature Rainfall Sunshine Humidity
See the full Viana do Castelo climate overview or explore weather in Portugal.
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