Rio Branco Weather in August
Average highs run from 32°C on August 1 to 34°C on August 31, and lows from 20°C to 22°C. Normal precipitation for the month is 40 mm over about 6 wet days.
August day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
August at a glance
- Average high
- 33°C
- Average low
- 21°C
- Precipitation
- 40 mm
- Reanalysis high
- 39°CAug 17, 2016
- Reanalysis low
- 10°CAug 17, 1999
- Daylight
- 11 h 41 min to 11 h 55 min
- Cloud cover
- 49%
- Humidity
- 68%
- Dew point
- 19°C
- Wind
- 3.2 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 32°C | 20°C | 37°C 2016 | 13°C 1993 | 18% |
| Aug 2 | 32°C | 20°C | 37°C 2016 | 13°C 1993 | 18% |
| Aug 3 | 32°C | 20°C | 37°C 2016 | 14°C 1991 | 19% |
| Aug 4 | 32°C | 20°C | 37°C 2016 | 11°C 1991 | 20% |
| Aug 5 | 32°C | 20°C | 38°C 2016 | 12°C 2019 | 20% |
| Aug 6 | 32°C | 20°C | 38°C 2016 | 13°C 2019 | 20% |
| Aug 7 | 32°C | 20°C | 38°C 2016 | 15°C 2010 | 21% |
| Aug 8 | 32°C | 20°C | 37°C 2016 | 16°C 1999 | 21% |
| Aug 9 | 33°C | 20°C | 37°C 2017 | 15°C 2004 | 21% |
| Aug 10 | 33°C | 20°C | 36°C 2019 | 16°C 1997 | 22% |
| Aug 11 | 33°C | 21°C | 37°C 1998 | 16°C 1997 | 23% |
| Aug 12 | 33°C | 21°C | 38°C 1998 | 15°C 1994 | 24% |
| Aug 13 | 33°C | 21°C | 38°C 1998 | 16°C 1993 | 26% |
| Aug 14 | 33°C | 21°C | 39°C 2016 | 17°C 2014 | 26% |
| Aug 15 | 33°C | 21°C | 38°C 2016 | 14°C 1999 | 25% |
| Aug 16 | 33°C | 21°C | 38°C 2016 | 12°C 1999 | 24% |
| Aug 17 | 33°C | 21°C | 39°C 2016 | 10°C 1999 | 22% |
| Aug 18 | 33°C | 21°C | 37°C 2019 | 14°C 1999 | 21% |
| Aug 19 | 33°C | 21°C | 37°C 2020 | 14°C 1999 | 22% |
| Aug 20 | 34°C | 21°C | 37°C 1998 | 16°C 1999 | 22% |
| Aug 21 | 34°C | 21°C | 38°C 1998 | 15°C 2018 | 23% |
| Aug 22 | 34°C | 21°C | 37°C 1995 | 15°C 2011 | 24% |
| Aug 23 | 34°C | 21°C | 37°C 1995 | 15°C 2011 | 25% |
| Aug 24 | 34°C | 21°C | 38°C 1998 | 16°C 2011 | 26% |
| Aug 25 | 34°C | 21°C | 38°C 2016 | 19°C 1991 | 26% |
| Aug 26 | 34°C | 21°C | 38°C 2016 | 17°C 2003 | 26% |
| Aug 27 | 34°C | 21°C | 38°C 1995 | 18°C 2013 | 26% |
| Aug 28 | 34°C | 22°C | 38°C 1995 | 15°C 2013 | 26% |
| Aug 29 | 34°C | 22°C | 38°C 2017 | 16°C 2013 | 27% |
| Aug 30 | 34°C | 22°C | 38°C 1995 | 16°C 2003 | 29% |
| Aug 31 | 34°C | 22°C | 38°C 2019 | 17°C 2003 | 31% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-5).
- August 1
- sunrise 5:47 AM, sunset 5:28 PM
- August 31
- sunrise 5:34 AM, sunset 5:29 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.