Best Time to Visit Viana do Castelo, nan, Portugal
Viana do Castelo is at its sunniest and driest in July–August.
The best time to visit Viana do Castelo for sunny, dry weather is July–August — 2 months of the year fit our sunny profiles at this specific location. The drier stretch runs through March–September; the wetter half falls in October–February. At the city itself, monthly average temperatures range from 10.1°C / 50.2°F in January to 19°C / 66.2°F in July, with rainfall from 28 mm / 1.1 in (July) to 220 mm / 8.7 in (December). These are point-value climate normals sampled at Viana do Castelo, nan, Portugal's coordinates — usually more actionable for travellers than the country-wide average. Viana do Castelo's climate is broadly seasonal. The full month-by-month table below lets you match your travel window against our five weather profiles.
Recommended months
| Month | Temp | Rain | Feels like |
|---|---|---|---|
| July | 19°C66.2°F | 28 mm1.1″ | Sunny & Mild |
| August | 18.9°C66°F | 30 mm1.2″ | Sunny & Mild |
Frequently asked questions
When is the best time to visit Viana do Castelo?
The best time to visit Viana do Castelo for sunny, dry weather is July, August. At the city itself, the warmest month is July averaging 19°C / 66.2°F, and the driest is July with about 28 mm / 1.1 in of rain. These are point-value climate normals sampled at Viana do Castelo's coordinates.
When is the rainy season in Viana do Castelo?
The rainy season at Viana do Castelo, nan runs through October–February, when monthly rainfall exceeds the annual median of about 114 mm / 4.5 in. The wettest single month is December (220 mm / 8.7 in).
What is the driest month in Viana do Castelo?
The driest month in Viana do Castelo is July, averaging about 28 mm / 1.1 in of rainfall. Temperature that month averages 19°C / 66.2°F.
What months should I avoid visiting Viana do Castelo?
The least comfortable months for travel to Viana do Castelo — based on point-value climate at the city — are January, February, March, November, December. These are the wettest or coolest months at this location. Rainfall peaks at 220 mm / 8.7 in in December, and the coldest month averages 10.1°C / 50.2°F.
Is Viana do Castelo climate different from Portugal overall?
Yes, usually. Our Viana do Castelo figures are point-value climate normals sampled at the city itself, while our Portugal figures are area-weighted averages across the whole country. The two can diverge substantially in geographically diverse or elevation-varied countries. The month-by-month table below reflects Viana do Castelo specifically — usually the more actionable data for a traveller planning to spend time in the city.