Viana do Castelo Climate by Month
Temperatures see a moderate degree of fluctuation,
transitioning from warm conditions
to mild.
It also has a relatively rainy climate with high levels of precipitation.
Let’s explore the climate details in depth to provide you with a complete overview.
Average day and night temperature
The climate in Viana do Castelo experiences moderate temperature changes, with mild shifts between seasons. On average, daytime temperatures range from a comfortable 24°C in August to a moderate 14°C in January. Nighttime temperatures can drop, with averages reaching 8°C in January.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Viana do Castelo is known for its substantial rainfall, with annual precipitation reaching 1649 mm. The seasons in Viana do Castelo, bring significant changes in precipitation. The wettest month, November, receives heavy rainfall, with an average of 225 mm of precipitation. This rainfall is distributed across 17 rainy days. In contrast, the driest month, July, experiences much less rainfall, totaling 29 mm over 7 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In Viana do Castelo, summer days are longer and more sunny, with daily sunshine hours peaking at 10.2 hours in July. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 4.1 hours per average day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is moderate throughout the year in Viana do Castelo.
Relative humidity over the year
The best time of year to visit Viana do Castelo in Portugal
During the months of June, July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Rainy season in Viana do Castelo occurs in the months of January, February, March, October, November and December.
August has an average maximum temperature of 24°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 14°C.
November tops the wettest month list with 225 mm of rainfall.
July is the driest month with 29 mm of precipitation.
July is the sunniest month with an average of 307 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
