Porto Acre Weather in September
Average highs run from 34°C on September 1 to 34°C on September 30, and lows from 22°C to 23°C. Normal precipitation for the month is 81 mm over about 15 wet days.
September day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
September at a glance
- Average high
- 34°C
- Average low
- 23°C
- Precipitation
- 81 mm
- Reanalysis high
- 39°CSep 25, 2019
- Reanalysis low
- 15°CSep 11, 2003
- Daylight
- 11 h 56 min to 12 h 10 min
- Cloud cover
- 63%
- Humidity
- 70%
- Dew point
- 21°C
- Wind
- 2.9 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 |
|---|---|---|---|---|---|
| Sep 1 | 34°C | 22°C | 38°C 2019 | 20°C 2003 | 36% |
| Sep 2 | 34°C | 22°C | 37°C 2006 | 19°C 2002 | 36% |
| Sep 3 | 34°C | 22°C | 37°C 1991 | 17°C 2002 | 38% |
| Sep 4 | 34°C | 22°C | 38°C 1991 | 19°C 2002 | 40% |
| Sep 5 | 34°C | 22°C | 38°C 2005 | 16°C 2018 | 41% |
| Sep 6 | 34°C | 22°C | 37°C 2005 | 17°C 2018 | 41% |
| Sep 7 | 34°C | 22°C | 38°C 1997 | 19°C 1996 | 42% |
| Sep 8 | 34°C | 22°C | 38°C 1998 | 20°C 2010 | 43% |
| Sep 9 | 34°C | 22°C | 38°C 1998 | 20°C 1991 | 44% |
| Sep 10 | 34°C | 22°C | 38°C 2016 | 17°C 2003 | 44% |
| Sep 11 | 34°C | 23°C | 37°C 2005 | 15°C 2003 | 44% |
| Sep 12 | 34°C | 23°C | 38°C 2016 | 15°C 2003 | 44% |
| Sep 13 | 34°C | 23°C | 38°C 1998 | 17°C 2004 | 45% |
| Sep 14 | 34°C | 23°C | 38°C 1997 | 16°C 2004 | 47% |
| Sep 15 | 34°C | 23°C | 38°C 2019 | 18°C 2005 | 48% |
| Sep 16 | 34°C | 23°C | 39°C 2019 | 19°C 1999 | 49% |
| Sep 17 | 34°C | 23°C | 38°C 2019 | 19°C 1999 | 50% |
| Sep 18 | 34°C | 23°C | 39°C 1997 | 18°C 2001 | 51% |
| Sep 19 | 34°C | 23°C | 38°C 2019 | 20°C 2001 | 51% |
| Sep 20 | 34°C | 23°C | 39°C 1997 | 17°C 1995 | 51% |
| Sep 21 | 34°C | 23°C | 38°C 2005 | 15°C 1995 | 51% |
| Sep 22 | 34°C | 23°C | 39°C 2005 | 17°C 1998 | 52% |
| Sep 23 | 34°C | 23°C | 38°C 2005 | 19°C 1998 | 51% |
| Sep 24 | 34°C | 23°C | 39°C 2005 | 21°C 2013 | 51% |
| Sep 25 | 34°C | 23°C | 39°C 2019 | 18°C 2013 | 51% |
| Sep 26 | 34°C | 23°C | 38°C 2010 | 18°C 2007 | 53% |
| Sep 27 | 34°C | 23°C | 39°C 2010 | 18°C 2000 | 54% |
| Sep 28 | 34°C | 23°C | 39°C 2010 | 19°C 2000 | 55% |
| Sep 29 | 34°C | 23°C | 39°C 2010 | 20°C 2000 | 56% |
| Sep 30 | 34°C | 23°C | 39°C 2010 | 22°C 2009 | 57% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-5).
- September 1
- sunrise 5:32 AM, sunset 5:28 PM
- September 30
- sunrise 5:15 AM, sunset 5:25 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.