Normal weather for Viana do Castelo in May
It's pleasantly warm in May in Viana do Castelo with an average temperature of 21°C. Temperatures this month range from a low of 19°C to a high of 24°C. At night, you can expect temperatures between 10°C and 15°C.
In May, there is an average of 83 mm of precipitation, spread over 12 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Viana do Castelo in May |
New York | ||
|---|---|---|---|
 Average Temperature |
21°C | 22°C | |
 High Temp |
24°C | 28°C | |
| Low Temp |
19°C | 17°C | |
 Total Precipitation |
83 mm | 105 mm | |
| Rainy Days |
12 days | 14 days | |
Start of May
The month of May starts in Viana do Castelo with mild temps, averaging around 21°C during the day and nights around 12°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
With the temperature difference between day and night, it’s smart to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
Mid May
By mid-May, daytime temps stay steady at around 21°C, with nights around 13°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
Since it cools down at night, it’s a good idea to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
End of May
By the end of May, the average daytime temperature in Viana do Castelo is around 23°C, while nighttime temps are about 14°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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Water temperature
The water temperature at Viana do Castelo is 19°C this month. Refreshing if you feel like a swim.
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit Viana do Castelo?
Looking for great weather? May is a good time to be in Viana do Castelo. The temperatures are nice, and there’s not too much rain.
Temperature records for Viana do Castelo in May
Check out the climate of Viana do Castelo for all months and discover the best travel time
Curious about the weather in other parts of Portugal? Check out the climate and weather for spots like Algarve, Lisbon, Albufeira, or explore other destinations in Portugal.
April
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Daily Temperature in May in Viana do Castelo
This chart shows the average daily high and low temperatures in May for Viana do Castelo, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Viana do Castelo
The chart below shows the average daily precipitation in May for Viana do Castelo, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 12 days of precipitation in Viana do Castelo.
Daily UV Index in May in Viana do Castelo
This chart shows the average daily UV index in May in Viana do Castelo, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Viana do Castelo Over the Years
This chart shows the average temperature in May in Viana do Castelo, measured in degrees Celsius, over the past few years.
Total Precipitation in May in Viana do Castelo Over the Years
This chart shows the average precipitation in May in Viana do Castelo, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in May for Viana do Castelo
Click on any day in May to get detailed info about the usual weather on that day in Viana do Castelo. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Viana do Castelo
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Average Weather in Viana do Castelo by Month
Click on a month below to see detailed weather info for Viana do Castelo. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Viana do Castelo for all months at once
