Monthly climate guide
Viana do Castelo weather in October
Expect warm weather in Viana do Castelo in October: afternoons reach about 21°C (70°F), while nights drop to around 14°C (56°F). Around 120 mm of rain falls over the month (wet), and skies are a mix of sun and cloud. Daytime highs are 4°C cooler than September and 5°C warmer than November.
What stands out in October
- It cools down fast from here: November is about 5°C cooler.
- Rain is above Viana do Castelo's usual level, by about 36%.
- Seasonally, October counts as mid-autumn in Viana do Castelo.
- Just 170 km apart, but Viana do Castelo runs about 2°C cooler than Coimbra this month.
Avg high
21°C
70°F
Avg low
14°C
56°F
Rainfall
120 mm
wet
Humidity
76%
relative
Sky
46%
cloud · a mix of sun and cloud
Viana do Castelo weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 13°C / 55°F | 7°C / 45°F | 141 mm | 87% | 54% |
| February | 14°C / 56°F | 7°C / 45°F | 102 mm | 84% | 51% |
| March | 15°C / 60°F | 8°C / 47°F | 111 mm | 81% | 49% |
| April | 17°C / 63°F | 10°C / 50°F | 104 mm | 81% | 52% |
| May | 20°C / 68°F | 12°C / 54°F | 70 mm | 78% | 43% |
| June | 22°C / 72°F | 14°C / 57°F | 34 mm | 74% | 41% |
| July | 26°C / 78°F | 16°C / 60°F | 13 mm | 69% | 28% |
| August | 26°C / 78°F | 16°C / 61°F | 25 mm | 69% | 30% |
| September | 25°C / 77°F | 16°C / 60°F | 52 mm | 69% | 34% |
| October | 21°C / 70°F | 14°C / 56°F | 120 mm | 76% | 46% |
| November | 16°C / 61°F | 10°C / 50°F | 152 mm | 84% | 53% |
| December | 14°C / 57°F | 8°C / 47°F | 132 mm | 86% | 54% |
What to pack for October
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is October a good time to visit Viana do Castelo?
Compare the months in the chart above to find your ideal window.
Best time to visit Viana do Castelo →Other Portugal cities in October
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Viana do Castelo weather in October. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/portugal/viana-do-castelo/october
<a href="https://weathercompare.eu/weather/portugal/viana-do-castelo/october">Viana do Castelo weather in October</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/portugal/viana-do-castelo" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Viana do Castelo weather in October"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/portugal/viana-do-castelo/october">Viana do Castelo weather in October</a> – WeatherCompare</p>
Viana do Castelo in October: quick answers
Is October a good time to visit Viana do Castelo?
October is one of the wetter months in Viana do Castelo, with about 120 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Viana do Castelo in October?
Average highs are about 21°C (70°F) and average lows about 14°C (56°F), based on 10 years of daily data.
Does it rain a lot in Viana do Castelo in October?
Viana do Castelo typically gets around 120 mm of rain in October — wet.
Figures are long-term averages for the area around Viana do Castelo (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.