Viana do Castelo
May
Weather in Viana do Castelo for May 2026
Your guide to Viana do Castelo weather in May - trends and predictions
In general, the average temperature in Viana do Castelo at the beginning of May is 18.1 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 21.1 °C by the end of May.
Viana do Castelo experiences moderate rainfall in May, with an average of 8 rainy days and a total precipitation of 294.8 mm.
Is May a good time to visit Viana do Castelo? check out the best time to travel to Viana do Castelo page.
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Temperatures
Rain 🌧️
More
23
Dry days
8
Rainy days
0
Snow days
22°/10°
Temperatures
21 km/h
Avg max wind
76 %
Avg humidity
Viana do Castelo Weather May
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Temperatures trend during May in Viana do Castelo
See the weather trend as well as the moving average line
May weather in Viana do Castelo day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Overcast | 18° /9° | 5 mm | 4 | |
| 2 May |  Partly cloudy | 19° /11° | 6.6 mm | 4 | |
| 3 May |  Moderate or heavy rain shower | 18° /11° | 11.8 mm | 4 | |
| 4 May | Moderate or heavy rain shower | 17° /12° | 18.6 mm | 4 | |
| 5 May |  Patchy rain possible | 18° /10° | 15.6 mm | 4 | |
| 6 May | Moderate or heavy rain shower | 18° /9° | 3.3 mm | 5 | |
| 7 May | Partly cloudy | 19° /11° | 0 mm | 5 | |
| 8 May |  Sunny | 21° /12° | 0.3 mm | 5 | |
| 9 May | Patchy rain possible | 19° /12° | 1.5 mm | 5 | |
| 10 May | Partly cloudy | 19° /11° | 2.9 mm | 5 | |
| 11 May | Sunny | 19° /10° | 0.3 mm | 5 | |
| 12 May | Sunny | 18° /9° | 1.3 mm | 4 | |
| 13 May | Sunny | 17° /10° | 2.2 mm | 5 | |
| 14 May |  Cloudy | 18° /9° | 2.1 mm | 5 | |
| 15 May | Sunny | 18° /10° | 2.2 mm | 5 | |
| 16 May | Overcast | 19° /10° | 1.6 mm | 5 | |
| 17 May | Partly cloudy | 21° /11° | 0.8 mm | 5 | |
| 18 May | Partly cloudy | 19° /11° | 3.3 mm | 5 | |
| 19 May | Patchy rain possible | 19° /10° | 0.4 mm | 5 | |
| 20 May | Overcast | 19° /10° | 0.3 mm | 4 | |
| 21 May | Cloudy | 19° /11° | 0.9 mm | 5 | |
| 22 May | Sunny | 20° /11° | 0.8 mm | 5 | |
| 23 May | Partly cloudy | 21° /11° | 0 mm | 5 | |
| 24 May | Patchy rain possible | 21° /12° | 0.1 mm | 5 | |
| 25 May | Sunny | 20° /12° | 0.1 mm | 5 | |
| 26 May | Moderate or heavy rain shower | 20° /11° | 2.6 mm | 5 | |
| 27 May | Moderate or heavy rain shower | 21° /11° | 3.8 mm | 5 | |
| 28 May | Sunny | 21° /12° | 6.5 mm | 5 | |
| 29 May | Sunny | 22° /14° | 0.6 mm | 6 | |
| 30 May | Sunny | 22° /15° | 2.5 mm | 5 | |
| 31 May | Patchy rain possible | 22° /14° | 0.1 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Viana do Castelo in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Viana do Castelo forecast closer to your planned date for the most up-to-date weather information.
Change Month
Viana do Castelo weather in May vs April vs June
Compare May weather in Viana do Castelo with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| April | May | June | |
|---|---|---|---|
| Weather | Patchy rain possible | Sunny | Patchy rain possible |
| Temperatures | 21°/8° | 22°/10° | 24°/13° |
| Rainfall | 322 mm | 295 mm | 198 mm |
| Wind | 20.3 km/h | 21.1 km/h | 19.2 km/h |
| Humidity | 75% | 76% | 78% |
| Rainy days | 11 days | 8 days | 9 days |
| Dry days | 19 days | 23 days | 21 days |
Planning a trip to Viana do Castelo? Discover the best time to visit
Viana do Castelo in May - FAQ
What are the expected maximum and minimum temperatures in Viana do Castelo during May?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Viana do Castelo during May?
Significant rainfall exceeding 294.8 mm is expected in Viana do Castelo during May, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Viana do Castelo during May?
The average wind speed in Viana do Castelo during May is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Viana do Castelo in May?
As you prepare for your trip to Viana do Castelo in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Viana do Castelo, during May, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
May rainfall patterns in Viana do Castelo
Explore the daily rainfall trends and prepare for Viana do Castelos May weather 💧
Typically, Viana do Castelo has 8 rainy days in May with a total of 294.8 mm of rainfall.
UV exposure in Viana do Castelo during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Viana do Castelo?Get accurate weather forecasts for Viana do Castelo, located at latitude 41.693 and longitude -8.833. Stay updated with localized weather information tailored for Viana do Castelo.
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