Weather in Viana do Castelo for August 2026
In general, the average temperature in Viana do Castelo at the beginning of August is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.1 °C by the end of August.
With an average of 4 rainy days, Viana do Castelo experiences minimal rainfall in August.
Is August a good time to visit Viana do Castelo? check out the best time to travel to Viana do Castelo page.
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Viana do Castelo Weather August
Temperatures trend during August in Viana do Castelo
August weather in Viana do Castelo day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. |  Patchy rain possible | 25° /16° | 0.3 mm | 6 | |
| 2 Aug. |  Moderate rain at times | 24° /15° | 0.9 mm | 6 | |
| 3 Aug. |  Sunny | 26° /16° | 0 mm | 7 | |
| 4 Aug. | Sunny | 26° /15° | 0 mm | 7 | |
| 5 Aug. | Sunny | 26° /15° | 0 mm | 7 | |
| 6 Aug. | Sunny | 26° /16° | 0 mm | 6 | |
| 7 Aug. | Sunny | 25° /16° | 0 mm | 6 | |
| 8 Aug. | Patchy rain possible | 26° /16° | 0 mm | 6 | |
| 9 Aug. | Sunny | 26° /16° | 0 mm | 6 | |
| 10 Aug. | Sunny | 25° /16° | 0 mm | 7 | |
| 11 Aug. | Sunny | 25° /16° | 0 mm | 6 | |
| 12 Aug. |  Partly cloudy | 24° /16° | 0.1 mm | 6 | |
| 13 Aug. | Patchy rain possible | 23° /14° | 0.6 mm | 5 | |
| 14 Aug. | Sunny | 23° /14° | 0 mm | 6 | |
| 15 Aug. | Sunny | 24° /15° | 0 mm | 6 | |
| 16 Aug. | Sunny | 25° /15° | 0 mm | 6 | |
| 17 Aug. | Partly cloudy | 23° /15° | 0 mm | 6 | |
| 18 Aug. | Patchy rain possible | 23° /16° | 0.4 mm | 5 | |
| 19 Aug. | Sunny | 22° /15° | 4 mm | 6 | |
| 20 Aug. | Sunny | 23° /15° | 0 mm | 6 | |
| 21 Aug. | Sunny | 25° /15° | 0 mm | 7 | |
| 22 Aug. | Sunny | 26° /16° | 0 mm | 7 | |
| 23 Aug. |  Cloudy | 25° /17° | 0 mm | 6 | |
| 24 Aug. |  Overcast | 22° /15° | 0.1 mm | 5 | |
| 25 Aug. |  Mist | 23° /13° | 0 mm | 5 | |
| 26 Aug. | Sunny | 22° /13° | 0 mm | 6 | |
| 27 Aug. | Sunny | 22° /13° | 0.1 mm | 5 | |
| 28 Aug. | Sunny | 22° /13° | 0 mm | 6 | |
| 29 Aug. | Sunny | 22° /14° | 1 mm | 6 | |
| 30 Aug. | Patchy rain possible | 22° /14° | 1 mm | 5 | |
| 31 Aug. | Patchy rain possible | 22° /14° | 1.1 mm | 5 | |
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Viana do Castelo weather in August vs July vs September
| July | August | September | |
|---|---|---|---|
| Weather | Sunny | Sunny | Patchy rain possible |
| Temperatures | 24°/15° | 24°/15° | 21°/14° |
| Rainfall | 20 mm | 10 mm | 69 mm |
| Wind | 22.1 km/h | 21.1 km/h | 19.4 km/h |
| Humidity | 75% | 74% | 74% |
| Rainy days | 6 days | 4 days | 17 days |
| Dry days | 25 days | 27 days | 13 days |
Planning a trip to Viana do Castelo? Discover the best time to visit
Viana do Castelo in August - FAQ
What are the expected maximum and minimum temperatures in Viana do Castelo during August?
How much rainfall should be expected in Viana do Castelo during August?
What are the typical wind conditions in Viana do Castelo during August?
What to pack to Viana do Castelo in August?
As you prepare for your trip to Viana do Castelo in August, 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 August, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable trousers
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
August rainfall patterns in Viana do Castelo
UV exposure in Viana do Castelo during August
Quick links
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.