Weather in Rio Branco on 4 August 2026
Preliminary outlook for 4 August 2026
A preliminary estimate based on the 2019–2025 archive: daytime around +35°C and nighttime around +21°C, average precipitation 0 mm, wind around 2 m/s, humidity around 42%.
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.
+28°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +22°C
Precipitation: 0 mm
Wind: 1 — 1 m/s
Humidity: 57%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +37°C | Sun hours | 11 h |
| UV index | 7 | Cloud cover (avg.) | 15% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +29°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 2 m/s | Wind direction (avg.) | 189° ↑ (NNE) |
Sunrise
05:46
Duration
11 h 43 min
Sunset
17:29
Moonrise
13:23
Moonset
01:40
Moon phase
Waxing Gibbous
Illumination
69%
+31°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +24°C
Precipitation: 0 mm
Wind: 2 — 2 m/s
Humidity: 39%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +41°C | Sun hours | 10 h |
| UV index | 8 | Cloud cover (avg.) | 20% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +31°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +31°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 286° ↖ (NW) |
Sunrise
05:46
Duration
11 h 43 min
Sunset
17:29
Moonrise
05:58
Moonset
17:50
Moon phase
New Moon
Illumination
0%
+29°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +23°C
Precipitation: 0 mm
Wind: 1 — 1 m/s
Humidity: 32%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +36°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 11% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +29°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +29°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 136° ↘ (SSE) |
Sunrise
05:47
Duration
11 h 42 min
Sunset
17:29
Moonrise
20:36
Moonset
08:16
Moon phase
Waning Gibbous
Illumination
78%
+27°C
Weather archive — for 2022 year
Partly Cloudy
Weather archive — for 2022 year
Nighttime: +23°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 66%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +34°C | Sun hours | 7 h |
| UV index | 7 | Cloud cover (avg.) | 37% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +21°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 315° ← (WNW) |
Sunrise
05:46
Duration
11 h 43 min
Sunset
17:29
Moonrise
10:33
Moonset
23:14
Moon phase
First Quarter
Illumination
44%
+27°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +20°C
Precipitation: 0 mm
Wind: 2 — 4 m/s
Humidity: 31%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +34°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 15% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +25°C | Dew point (avg.) | +12°C |
| Heat index (avg.) | +25°C | Wind chill (avg.) | +25°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 142° ↘ (SSE) |
Sunrise
05:46
Duration
11 h 43 min
Sunset
17:29
Moonrise
02:27
Moonset
14:13
Moon phase
Waning Crescent
Illumination
18%
+27°C
Weather archive — for 2020 year
Clear/Sunny
Weather archive — for 2020 year
Nighttime: +20°C
Precipitation: 0 mm
Wind: 1 — 2 m/s
Humidity: 39%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +35°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 10% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +26°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +26°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 160° ↘ (SE) |
Sunrise
05:46
Duration
11 h 43 min
Sunset
17:29
Moonrise
18:33
Moonset
06:33
Moon phase
Full Moon
Illumination
100%
+20°C
Weather archive — for 2019 year
Clear/Sunny
Weather archive — for 2019 year
Nighttime: +15°C
Precipitation: 0 mm
Wind: 3 — 5 m/s
Humidity: 27%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 12 h |
| UV index | 5 | Cloud cover (avg.) | 11% |
| Pressure (avg.) | 765 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +19°C | Dew point (avg.) | +1°C |
| Heat index (avg.) | +19°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 158° ↘ (SE) |
Sunrise
05:47
Duration
11 h 42 min
Sunset
17:29
Moonrise
08:52
Moonset
21:13
Moon phase
Waxing Crescent
Illumination
20%
Weather in Rio Branco on 4 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+37°C
|
+22°C
|
+28°C | 11 h | 7 | 57% | 1 — 1 m/s |
| 2024 |
+41°C
|
+24°C
|
+31°C | 10 h | 8 | 39% | 2 — 2 m/s |
| 2023 |
+36°C
|
+23°C
|
+29°C | 12 h | 7 | 32% | 1 — 1 m/s |
| 2022 |
+34°C
|
+23°C
|
+27°C | 7 h | 7 | 66% | 2 — 3 m/s |
| 2021 |
+34°C
|
+20°C
|
+27°C | 12 h | 7 | 31% | 2 — 4 m/s |
| 2020 |
+35°C
|
+20°C
|
+27°C | 12 h | 7 | 39% | 1 — 2 m/s |
| 2019 |
+27°C
|
+15°C
|
+20°C | 12 h | 5 | 27% | 3 — 5 m/s |