São Mateus Weather in September
Average highs run from 29°C on September 1 to 30°C on September 30, and lows from 18°C to 20°C. Normal precipitation for the month is 57 mm over about 12 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
- 29°C
- Average low
- 19°C
- Precipitation
- 57 mm
- Reanalysis high
- 41°CSep 10, 1997
- Reanalysis low
- 13°CSep 25, 1999
- Daylight
- 11 h 45 min to 12 h 15 min
- Cloud cover
- 53%
- Humidity
- 73%
- Dew point
- 18°C
- Wind
- 9.4 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 | 29°C | 18°C | 33°C 2014 | 15°C 2006 | 33% |
| Sep 2 | 29°C | 18°C | 33°C 2014 | 15°C 2008 | 34% |
| Sep 3 | 29°C | 19°C | 34°C 2006 | 15°C 2011 | 33% |
| Sep 4 | 29°C | 19°C | 35°C 1996 | 15°C 2011 | 34% |
| Sep 5 | 29°C | 19°C | 33°C 2009 | 15°C 1991 | 35% |
| Sep 6 | 29°C | 19°C | 33°C 1993 | 15°C 2011 | 36% |
| Sep 7 | 29°C | 19°C | 33°C 2015 | 15°C 2004 | 36% |
| Sep 8 | 29°C | 19°C | 34°C 1997 | 14°C 1991 | 37% |
| Sep 9 | 29°C | 19°C | 37°C 1997 | 15°C 1991 | 39% |
| Sep 10 | 29°C | 19°C | 41°C 1997 | 16°C 1991 | 40% |
| Sep 11 | 29°C | 19°C | 34°C 2001 | 16°C 1994 | 40% |
| Sep 12 | 29°C | 19°C | 34°C 2015 | 15°C 1994 | 39% |
| Sep 13 | 29°C | 19°C | 33°C 2012 | 16°C 1994 | 39% |
| Sep 14 | 29°C | 19°C | 35°C 1997 | 16°C 1994 | 39% |
| Sep 15 | 29°C | 19°C | 37°C 1997 | 16°C 1993 | 38% |
| Sep 16 | 29°C | 19°C | 34°C 2018 | 17°C 2007 | 39% |
| Sep 17 | 30°C | 19°C | 32°C 1993 | 17°C 2020 | 39% |
| Sep 18 | 30°C | 19°C | 34°C 1997 | 17°C 2001 | 39% |
| Sep 19 | 30°C | 19°C | 33°C 2016 | 17°C 2007 | 40% |
| Sep 20 | 30°C | 19°C | 34°C 2009 | 16°C 2007 | 40% |
| Sep 21 | 30°C | 19°C | 36°C 1997 | 16°C 2011 | 39% |
| Sep 22 | 30°C | 19°C | 33°C 2013 | 17°C 1994 | 38% |
| Sep 23 | 30°C | 19°C | 35°C 2013 | 17°C 2000 | 37% |
| Sep 24 | 30°C | 19°C | 34°C 2007 | 15°C 1999 | 37% |
| Sep 25 | 30°C | 20°C | 35°C 2003 | 13°C 1999 | 36% |
| Sep 26 | 30°C | 20°C | 33°C 2015 | 14°C 1999 | 35% |
| Sep 27 | 30°C | 20°C | 36°C 2003 | 15°C 2012 | 36% |
| Sep 28 | 30°C | 20°C | 34°C 2018 | 16°C 2012 | 37% |
| Sep 29 | 30°C | 20°C | 36°C 2009 | 16°C 2012 | 38% |
| Sep 30 | 30°C | 20°C | 35°C 1997 | 15°C 1994 | 40% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 5:47 AM, sunset 5:32 PM
- September 30
- sunrise 5:22 AM, sunset 5:37 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.