Weather in Viana do Castelo on 19 August 2026
Preliminary outlook for 19 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +23°C and nighttime around +16°C, average precipitation 1.3 mm, wind around 5 m/s, humidity around 78%.
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.
+18°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +15°C
Precipitation: 0 mm
Wind: 5 — 6 m/s
Humidity: 83%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +22°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 4% |
| 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.) | 9 m/s | Wind direction (avg.) | 251° ↖ (NW) |
Sunrise
06:48
Duration
13 h 41 min
Sunset
20:29
Moonrise
01:41
Moonset
18:12
Moon phase
Waning Crescent
Illumination
22%
+19°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +16°C
Sea temperature: +19°C
Precipitation: 0 mm
Wind: 4 — 7 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 2% |
| Pressure (avg.) | 761 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.) | +20°C |
| Wind gusts (max.) | 13 m/s | Wind direction (avg.) | 167° ↖ (NW) |
Sunrise
06:48
Duration
13 h 41 min
Sunset
20:29
Moonrise
20:38
Moonset
05:54
Moon phase
Full Moon
Illumination
100%
+20°C
Weather archive — for 2023 year
Overcast
Weather archive — for 2023 year
Nighttime: +18°C
Precipitation: 3.6 mm
Wind: 3 — 4 m/s
Humidity: 94%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +21°C | Sun hours | 3 h |
| UV index | 4 | Cloud cover (avg.) | 91% |
| Pressure (avg.) | 764 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 8 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +19°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 201° ↓ (S) |
Sunrise
06:47
Duration
13 h 43 min
Sunset
20:30
Moonrise
09:53
Moonset
22:09
Moon phase
Waxing Crescent
Illumination
16%
+22°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +16°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 62%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +28°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.) | +23°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +23°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 179° ↖ (NW) |
Sunrise
06:48
Duration
13 h 41 min
Sunset
20:29
Moonrise
00:02
Moonset
15:11
Moon phase
Last Quarter
Illumination
47%
+18°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +14°C
Precipitation: 0 mm
Wind: 5 — 6 m/s
Humidity: 70%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 1% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +19°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +19°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 256° ↖ (NW) |
Sunrise
06:48
Duration
13 h 41 min
Sunset
20:29
Moonrise
18:37
Moonset
02:31
Moon phase
Waxing Gibbous
Illumination
76%
+19°C
Weather archive — for 2020 year
Moderate or heavy rain shower
Weather archive — for 2020 year
Nighttime: +18°C
Precipitation: 4.1 mm
Wind: 6 — 8 m/s
Humidity: 87%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +21°C | Sun hours | 1 h |
| UV index | 4 | Cloud cover (avg.) | 93% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 15 m/s | Wind direction (avg.) | 171° ↓ (S) |
Sunrise
06:48
Duration
13 h 41 min
Sunset
20:29
Moonrise
06:46
Moonset
21:06
Moon phase
New Moon
Illumination
0%
Weather in Viana do Castelo on 19 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+22°C
|
+15°C
|
+18°C | 14 h | 5 | 83% | 5 — 6 m/s |
| 2024 |
+23°C
|
+16°C
|
+19°C | 14 h | 5 | 69% | 4 — 7 m/s |
| 2023 |
+21°C
|
+18°C
|
+20°C | 3 h | 4 | 94% | 3 — 4 m/s |
| 2022 |
+28°C
|
+16°C
|
+22°C | 14 h | 6 | 62% | 4 — 5 m/s |
| 2021 |
+23°C
|
+14°C
|
+18°C | 14 h | 5 | 70% | 5 — 6 m/s |
| 2020 |
+21°C
|
+18°C
|
+19°C | 1 h | 4 | 87% | 6 — 8 m/s |