Viana do Castelo Weather in May
What's the weather like in Viana do Castelo (Viana do Castelo) in May 2025?
The climate in Viana do Castelo during May can be summarized as mild and damp.
May is in the spring in Viana do Castelo and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 10°C (50°F) is normal.
| Daytime temperature | 18.6°C 65.5°F |
|---|---|
| Nightly temperature | 9.8°C 49.6°F |
| Average temperature | 14.2°C 57.6°F |
| Daily sunshine | 8.2 hrs |
| Avg rainfall | 114 mm 4.5 ins |
| Rainy days | 15 days |
| Sea temperature | 15.5°C 59.8°F |
| Humidity | 74% |
| Windspeed | 16.6kph 10 mph |
On average May is the 5th driest month of the year in Viana do Castelo with around 114mm 4.5 inches of rain making it a damp time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.2 hours of sunshine per day.
May temperatures in Viana do Castelo
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Viana do Castelo in May 2025.
Other monthly averages
Viana do Castelo weather stats
| Hottest month: | July | 24.1°C 75.4°F |
|---|---|---|
| Driest month: | August | 27mm 1.1ins |
| Sunniest month: | August | 10hrs |
| Coldest month: | January | 12.2°C 54°F |
| Wettest month: | January | 232mm 9.1ins |
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