Weather in Viana do Castelo on 14 August 2026
Preliminary outlook for 14 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +23°C and nighttime around +16°C, average precipitation 0 mm, wind around 4 m/s, humidity around 77%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+21°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +17°C
Precipitation: 0 mm
Wind: 2 — 4 m/s
Humidity: 67%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 2% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 242° ← (W) |
Sunrise
06:43
Duration
13 h 53 min
Sunset
20:36
Moonrise
22:54
Moonset
12:11
Moon phase
Waning Gibbous
Illumination
59%
+18°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +14°C
Sea temperature: +19°C
Precipitation: 0 mm
Wind: 6 — 8 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 5% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +19°C |
| Feels like (avg.) | +20°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 16 m/s | Wind direction (avg.) | 257° ↖ (NNW) |
Sunrise
06:43
Duration
13 h 53 min
Sunset
20:36
Moonrise
17:05
Moonset
00:51
Moon phase
First Quarter
Illumination
64%
+19°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +14°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 82%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 7% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +19°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +19°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 254° ↖ (NW) |
Sunrise
06:42
Duration
13 h 55 min
Sunset
20:37
Moonrise
04:33
Moonset
20:15
Moon phase
Waning Crescent
Illumination
6%
+19°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +15°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 81%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 12 h |
| UV index | 5 | Cloud cover (avg.) | 5% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 167° ← (WNW) |
Sunrise
06:42
Duration
13 h 55 min
Sunset
20:37
Moonrise
22:17
Moonset
09:06
Moon phase
Waxing Gibbous
Illumination
83%
+21°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 3 — 5 m/s
Humidity: 72%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +25°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 0% |
| Pressure (avg.) | 764 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +21°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 170° ↖ (NW) |
Sunrise
06:43
Duration
13 h 53 min
Sunset
20:36
Moonrise
12:45
Moonset
23:45
Moon phase
First Quarter
Illumination
40%
+18°C
Weather archive — for 2020 year
Clear/Sunny
Weather archive — for 2020 year
Nighttime: +15°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 81%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +21°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 3% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +18°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +19°C | Wind chill (avg.) | +18°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 170° ← (WNW) |
Sunrise
06:43
Duration
13 h 53 min
Sunset
20:36
Moonrise
02:02
Moonset
17:31
Moon phase
Waning Crescent
Illumination
23%
Weather in Viana do Castelo on 14 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+26°C
|
+17°C
|
+21°C | 14 h | 6 | 67% | 2 — 4 m/s |
| 2024 |
+23°C
|
+14°C
|
+18°C | 14 h | 5 | 76% | 6 — 8 m/s |
| 2023 |
+22°C
|
+14°C
|
+19°C | 14 h | 5 | 82% | 4 — 5 m/s |
| 2022 |
+23°C
|
+15°C
|
+19°C | 12 h | 5 | 81% | 3 — 4 m/s |
| 2021 |
+25°C
|
+18°C
|
+21°C | 14 h | 6 | 72% | 3 — 5 m/s |
| 2020 |
+21°C
|
+15°C
|
+18°C | 14 h | 5 | 81% | 3 — 4 m/s |