Yby Yaú Weather in September
Average highs run from 30°C on September 1 to 30°C on September 30, and lows from 16°C to 18°C. Normal precipitation for the month is 93 mm over about 9 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
- 30°C
- Average low
- 17°C
- Precipitation
- 93 mm
- Reanalysis high
- 40°CSep 16, 2019
- Reanalysis low
- 3°CSep 6, 2006
- Daylight
- 11 h 39 min to 12 h 17 min
- Cloud cover
- 51%
- Humidity
- 63%
- Dew point
- 14°C
- Wind
- 5.0 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 | 30°C | 16°C | 39°C 1995 | 8°C 2002 | 18% |
| Sep 2 | 30°C | 16°C | 39°C 1995 | 5°C 2002 | 19% |
| Sep 3 | 30°C | 16°C | 38°C 1995 | 6°C 2002 | 19% |
| Sep 4 | 30°C | 16°C | 38°C 1999 | 7°C 2006 | 19% |
| Sep 5 | 30°C | 16°C | 37°C 1999 | 4°C 2006 | 20% |
| Sep 6 | 30°C | 16°C | 37°C 1993 | 3°C 2006 | 21% |
| Sep 7 | 30°C | 16°C | 38°C 2019 | 5°C 2016 | 22% |
| Sep 8 | 30°C | 16°C | 38°C 1997 | 6°C 2016 | 23% |
| Sep 9 | 30°C | 16°C | 39°C 1997 | 8°C 1996 | 23% |
| Sep 10 | 30°C | 16°C | 39°C 2017 | 6°C 1996 | 22% |
| Sep 11 | 31°C | 17°C | 39°C 1995 | 7°C 2003 | 22% |
| Sep 12 | 31°C | 17°C | 38°C 1994 | 7°C 2015 | 24% |
| Sep 13 | 31°C | 17°C | 39°C 2017 | 6°C 2015 | 25% |
| Sep 14 | 31°C | 17°C | 38°C 2007 | 8°C 2004 | 25% |
| Sep 15 | 31°C | 17°C | 40°C 2019 | 10°C 2010 | 26% |
| Sep 16 | 31°C | 17°C | 40°C 2019 | 9°C 2001 | 25% |
| Sep 17 | 31°C | 17°C | 39°C 2012 | 5°C 2001 | 28% |
| Sep 18 | 31°C | 17°C | 39°C 1995 | 8°C 2013 | 30% |
| Sep 19 | 30°C | 17°C | 38°C 2017 | 9°C 2013 | 31% |
| Sep 20 | 30°C | 17°C | 39°C 1994 | 9°C 1992 | 31% |
| Sep 21 | 30°C | 17°C | 39°C 2017 | 8°C 1998 | 32% |
| Sep 22 | 30°C | 17°C | 38°C 2017 | 7°C 2008 | 33% |
| Sep 23 | 31°C | 17°C | 39°C 1994 | 9°C 2008 | 34% |
| Sep 24 | 31°C | 17°C | 39°C 1994 | 9°C 2013 | 36% |
| Sep 25 | 31°C | 18°C | 39°C 1994 | 5°C 2013 | 38% |
| Sep 26 | 30°C | 18°C | 39°C 2004 | 7°C 2000 | 38% |
| Sep 27 | 31°C | 18°C | 38°C 2004 | 7°C 2012 | 38% |
| Sep 28 | 31°C | 18°C | 38°C 2002 | 10°C 1992 | 39% |
| Sep 29 | 30°C | 18°C | 39°C 2002 | 11°C 1992 | 39% |
| Sep 30 | 30°C | 18°C | 39°C 2020 | 14°C 2009 | 40% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 6:57 AM, sunset 6:36 PM
- September 30
- sunrise 6:28 AM, sunset 6:45 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.