Weather in Barreiro on 20 August 2026
Preliminary outlook for 20 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +28°C and nighttime around +19°C, average precipitation 0 mm, wind around 5 m/s, humidity around 71%.
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: +18°C
Precipitation: 0 mm
Wind: 7 — 9 m/s
Humidity: 71%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +25°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 23% |
| Pressure (avg.) | 763 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.) | 11 m/s | Wind direction (avg.) | 337° ↖ (NNW) |
Sunrise
06:55
Duration
13 h 29 min
Sunset
20:24
Moonrise
03:05
Moonset
18:52
Moon phase
Waning Crescent
Illumination
15%
+23°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +19°C
Sea temperature: +20°C
Precipitation: 0 mm
Wind: 7 — 8 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +28°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 7% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +20°C |
| Feels like (avg.) | +24°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +24°C | Wind chill (avg.) | +23°C |
| Wind gusts (max.) | 12 m/s | Wind direction (avg.) | 343° ↖ (NNW) |
Sunrise
06:55
Duration
13 h 28 min
Sunset
20:23
Moonrise
21:00
Moonset
07:15
Moon phase
Full Moon
Illumination
100%
+24°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +20°C
Precipitation: 0 mm
Wind: 3 — 7 m/s
Humidity: 68%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 14% |
| Pressure (avg.) | 764 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +25°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +26°C | Wind chill (avg.) | +25°C |
| Wind gusts (max.) | 12 m/s | Wind direction (avg.) | 341° ↖ (NNW) |
Sunrise
06:54
Duration
13 h 30 min
Sunset
20:24
Moonrise
10:52
Moonset
22:31
Moon phase
Waxing Crescent
Illumination
23%
+25°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +19°C
Precipitation: 0 mm
Wind: 3 — 7 m/s
Humidity: 52%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +32°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 0% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +26°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +26°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 249° ↖ (NNW) |
Sunrise
06:54
Duration
13 h 30 min
Sunset
20:24
Moonrise
00:47
Moonset
16:07
Moon phase
Last Quarter
Illumination
39%
+21°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 4 — 7 m/s
Humidity: 71%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 1% |
| Pressure (avg.) | 761 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.) | +22°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 332° ↖ (NNW) |
Sunrise
06:55
Duration
13 h 29 min
Sunset
20:24
Moonrise
19:22
Moonset
03:51
Moon phase
Waxing Gibbous
Illumination
83%
+21°C
Weather archive — for 2020 year
Overcast
Weather archive — for 2020 year
Nighttime: +20°C
Precipitation: 0.1 mm
Wind: 4 — 5 m/s
Humidity: 90%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 1 h |
| UV index | 6 | Cloud cover (avg.) | 79% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 6 km | Sea temperature | — |
| Feels like (avg.) | +23°C | Dew point (avg.) | +20°C |
| Heat index (avg.) | +23°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 215° ↓ (SSW) |
Sunrise
06:55
Duration
13 h 28 min
Sunset
20:23
Moonrise
08:00
Moonset
21:33
Moon phase
Waxing Crescent
Illumination
6%
Weather in Barreiro on 20 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+25°C
|
+18°C
|
+21°C | 14 h | 6 | 71% | 7 — 9 m/s |
| 2024 |
+28°C
|
+19°C
|
+23°C | 14 h | 6 | 72% | 7 — 8 m/s |
| 2023 |
+31°C
|
+20°C
|
+24°C | 14 h | 6 | 68% | 3 — 7 m/s |
| 2022 |
+32°C
|
+19°C
|
+25°C | 14 h | 6 | 52% | 3 — 7 m/s |
| 2021 |
+27°C
|
+18°C
|
+21°C | 14 h | 6 | 71% | 4 — 7 m/s |
| 2020 |
+23°C
|
+20°C
|
+21°C | 1 h | 6 | 90% | 4 — 5 m/s |