The climate of Viana do Castelo
Viana do Castelo, located in
Portugal, possesses a warm summer Mediterranean climate, also known as a Csb climate according to the Köppen climate classification. The general atmospheric conditions span across a spectrum marked by hot summers accompanied by cooler evenings and moderate to wet winters.
The annual temperature registers a low of 4.9°C (40.8°F) in the coldest month rising to a peak of 26.4°C (79.5°F) during the summertime. It's interesting to note that sea temperature varies from 13.8°C (56.8°F) to 18.3°C (64.9°F), indicating conducive conditions for sea-related activities for the most part of the year. Daylight hours are shortest in
December at 9.2 hours, extending up to a generous 15.2 hours during summer, allowing ample time for sightseeing and outdoor activities.
Unusual patterns manifest in the form of the maximum temperature of 26.4°C (79.5°F) occurring not in the traditionally hottest
July but in
August. Conditions seem to remain somewhat constant during the colder months, with the lowest mercury level recorded in
January, only to rise slightly in
February and
March, instead of a more sharp upward trajectory.
The best time to visit Viana do Castelo
The favourable period to enjoy the scenic beauty and cultural ambiance of
Viana do Castelo falls between
May and
September. During these months, temperatures hover between 20.7°C (69.3°F) and 26.4°C (79.5°F), providing a comfortable warm climate ideal for outdoor activities. The daylight hours range from 14.5 to 15.2 hours, making it an excellent time for sightseeing and exploration. Sea temperatures also stay relatively warm, from 16.3°C (61.3°F) to 18.3°C (64.9°F), encouraging maritime pursuits and beach activities.
The worst time to visit Viana do Castelo
Winter months, from
December through to
February, stand as the least attractive for visits owing to lower temperatures that dip to 4.9°C (40.8°F) along with reduced daylight hours. This period sees the shortest daylight stretches, dropping to an annual minimum of 9.2 hours in December. Sea temperatures also lose their warmth, falling to 13.8°C (56.8°F), discouraging sea swimming and water sports activities.
Spring weather in Viana do Castelo
Spring in
Viana do Castelo ushers in a temperate era from
March to
May, with temperatures improving from a gentle 17.9°C (64.2°F) to a warmer 20.7°C (69.3°F). Correspondingly, daylight hours increase from 12 hours in March up to 14.5 hours by May. Sea temperatures moderately rise from 13.8°C (56.8°F) to 16.3°C (61.3°F), initiating the start of the nautical season.
Summer weather in Viana do Castelo
June to
August constitute the summer period when an influx of tourists seek out the warmth and beauty of
Viana do Castelo. Temperatures briskly rise from a comfortable 24.5°C (76.1°F) to a balmy 26.4°C (79.5°F). The daylight amply supports summer activities, averaging between 14.9 and 15.2 hours. Sea temperatures hover between 17.2°C (63°F) and 17.9°C (64.2°F), making it an excellent period for beach and water activities.
Autumn weather in Viana do Castelo
Autumn, stretching from
September to
November, presents a gradually cooling course with temperatures lowering from 24.8°C (76.6°F) down to 17.4°C (63.3°F). Daylight hours gradually decrease from 12.5 hours to 9.9 hours. Yet, with sea temperatures maintaining their warmth between 18.3°C (64.9°F) and 16.9°C (62.4°F), it remains a pleasant time for water sports enthusiasts.
Winter weather in Viana do Castelo
Winter, from
December to
February, registers the coldest weather conditions of the year. The temperatures fall to the year’s minimum, reaching 4.9°C (40.8°F). Daylight recedes to as low as 9.2 hours per day, contributing to the cold, less inviting weather. Sea temperatures also plummet to their lowest - dropping from 15.4°C (59.7°F) in December to 13.8°C (56.8°F) in February, dampening the prospects for swimming or boating activities.
Weather in January
For the region of
Viana do Castelo,
Portugal, the beginning of the year embodies moderate weather conditions.
January experiences average high temperatures of 14.6°C (58.3°F) and low temperatures descend to an average of 4.9°C (40.8°F).
Weather in January »Weather in February
Warmer rays of sunlight begin to seep into the atmosphere of
Viana do Castelo as
February edges on, offering a more comfortable weather spectrum than the previous month of
January. With a sea temperature averaging 13.8°C (56.8°F), an occasional mild breeze from the coast may waft into town.
Weather in February »Weather in March
The weather in
Viana do Castelo during
March balances itself between the chilling remnants of winter and the blooming warmth of spring. The high temperature averages around 17.9°C (64.2°F) marking a progress in warmth from the preceding month of
February.
Weather in March »
Weather in April
April's weather reflects the full arrival of spring in
Viana do Castelo. The month expresses a higher average temperature of 18.5°C (65.3°F). Each day has longer sunlight hours than
March and this illumination brings life to the blooming flora of the city.
Weather in April » Weather in May
In
May, the weather in
Viana do Castelo is characterized by substantial daylight and increasing heat. With the high temperature reaching an average of 20.7°C (69.3°F), the overall atmosphere becomes more summery than that of
April.
Weather in May »Weather in June
June in
Viana do Castelo welcomes summer with an average temperature plunge of 24.5°C (76.1°F). The days are elongated the most during this month relative to any other month in the year. Holiday-goers flock to the city due to the pleasant weather conditions, which are preferable compared to the increasing temperature of
July.
Weather in June »
Weather in July
July in
Viana do Castelo carries the heat of summer to its peak with an average high of 26.3°C (79.3°F). From being an extremely bright and long day in
June, the day length subtly recedes in July. Balmy weather and calmer sea breezes mark a distinction from the expected weather in
August.
Weather in July » Weather in August
August conveys the tail end of summer in
Viana do Castelo,
Portugal. With the highest low temperature of the year at 15.1°C (59.2°F), it enjoys a tiny marginally cooler climate compared to
July. Owing to the generally pleasant weather, activities in Viana do Castelo rarely face any hindrance.
Weather in August » Weather in September
September brings the commencement of autumn to
Viana do Castelo. Contrasting with the warmer temperature in
August, the average high temperature declines to 24.8°C (76.6°F). The length of daylight noticeably shortens, sympathizing with the midnight blues of winter.
Weather in September »
Weather in October
Weather in November
Weather in December
The weather in
December in
Viana do Castelo,
Portugal, is distinguished by its winter characteristic. Temperature highs averaging 15.2°C (59.4°F) indicate the oncoming chill of the winter season. It has fewer daylight hours than the month of
November, bringing early twilight and a crisp climate.
Weather in December »