Belém de São Francisco Weather in September
Average highs run from 33°C on September 1 to 35°C on September 30, and lows from 19°C to 20°C. Normal precipitation for the month is 15 mm over about 3 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
- 19°C
- Precipitation
- 15 mm
- Reanalysis high
- 39°CSep 11, 1997
- Reanalysis low
- 16°CSep 6, 2010
- Daylight
- 11 h 56 min to 12 h 10 min
- Cloud cover
- 33%
- Humidity
- 58%
- Dew point
- 15°C
- Wind
- 23.4 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 | 33°C | 19°C | 36°C 1993 | 16°C 1999 | 8% |
| Sep 2 | 33°C | 19°C | 37°C 2002 | 16°C 2006 | 8% |
| Sep 3 | 33°C | 19°C | 37°C 2014 | 16°C 2017 | 8% |
| Sep 4 | 33°C | 19°C | 38°C 2014 | 17°C 2012 | 10% |
| Sep 5 | 33°C | 19°C | 38°C 2015 | 16°C 1999 | 10% |
| Sep 6 | 33°C | 19°C | 36°C 2015 | 16°C 2010 | 11% |
| Sep 7 | 33°C | 19°C | 37°C 1997 | 17°C 2020 | 12% |
| Sep 8 | 33°C | 19°C | 38°C 1997 | 16°C 1991 | 12% |
| Sep 9 | 33°C | 19°C | 38°C 1997 | 17°C 1993 | 12% |
| Sep 10 | 34°C | 19°C | 38°C 1997 | 16°C 2011 | 12% |
| Sep 11 | 34°C | 19°C | 39°C 1997 | 16°C 2007 | 12% |
| Sep 12 | 34°C | 19°C | 38°C 2001 | 16°C 2006 | 11% |
| Sep 13 | 34°C | 19°C | 36°C 2015 | 16°C 2006 | 10% |
| Sep 14 | 34°C | 19°C | 35°C 2015 | 17°C 2012 | 11% |
| Sep 15 | 34°C | 19°C | 36°C 1997 | 17°C 2014 | 11% |
| Sep 16 | 34°C | 19°C | 38°C 1997 | 17°C 2004 | 11% |
| Sep 17 | 34°C | 19°C | 38°C 2001 | 16°C 2005 | 11% |
| Sep 18 | 34°C | 19°C | 38°C 1993 | 17°C 1995 | 10% |
| Sep 19 | 34°C | 19°C | 38°C 1997 | 16°C 2002 | 9% |
| Sep 20 | 34°C | 19°C | 37°C 1993 | 16°C 2011 | 8% |
| Sep 21 | 35°C | 19°C | 38°C 2005 | 16°C 2011 | 8% |
| Sep 22 | 35°C | 19°C | 38°C 1997 | 17°C 2000 | 7% |
| Sep 23 | 35°C | 20°C | 38°C 1997 | 16°C 1994 | 6% |
| Sep 24 | 35°C | 20°C | 37°C 2008 | 17°C 2017 | 6% |
| Sep 25 | 35°C | 20°C | 38°C 2013 | 17°C 2007 | 5% |
| Sep 26 | 35°C | 20°C | 38°C 2013 | 18°C 2007 | 5% |
| Sep 27 | 35°C | 20°C | 38°C 2003 | 17°C 1995 | 6% |
| Sep 28 | 35°C | 20°C | 39°C 2003 | 18°C 2007 | 6% |
| Sep 29 | 35°C | 20°C | 38°C 2003 | 17°C 1997 | 6% |
| Sep 30 | 35°C | 20°C | 38°C 2003 | 17°C 2007 | 6% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 5:38 AM, sunset 5:34 PM
- September 30
- sunrise 5:21 AM, sunset 5:31 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.