Piedras Negras Weather in September
Average highs run from 36°C on September 1 to 32°C on September 30, and lows from 24°C to 19°C. Normal precipitation for the month is 81 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
- 34°C
- Average low
- 22°C
- Precipitation
- 81 mm
- Reanalysis high
- 44°CSep 5, 2000
- Reanalysis low
- 10°CSep 26, 2000
- Daylight
- 12 h 43 min to 11 h 54 min
- Cloud cover
- 44%
- Humidity
- 62%
- Dew point
- 18°C
- Wind
- 13.3 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 | 36°C | 24°C | 42°C 2000 | 21°C 2008 | 25% |
| Sep 2 | 35°C | 24°C | 42°C 2000 | 20°C 2004 | 26% |
| Sep 3 | 35°C | 24°C | 41°C 2000 | 19°C 2004 | 29% |
| Sep 4 | 35°C | 23°C | 42°C 2000 | 19°C 2010 | 30% |
| Sep 5 | 35°C | 23°C | 44°C 2000 | 21°C 1994 | 31% |
| Sep 6 | 35°C | 23°C | 44°C 2000 | 17°C 2011 | 32% |
| Sep 7 | 34°C | 23°C | 41°C 2012 | 17°C 2006 | 33% |
| Sep 8 | 34°C | 23°C | 40°C 2001 | 15°C 2004 | 33% |
| Sep 9 | 34°C | 23°C | 40°C 1997 | 17°C 2020 | 34% |
| Sep 10 | 34°C | 23°C | 41°C 2000 | 14°C 2020 | 33% |
| Sep 11 | 34°C | 22°C | 42°C 2000 | 15°C 2020 | 33% |
| Sep 12 | 34°C | 22°C | 38°C 2011 | 19°C 2020 | 32% |
| Sep 13 | 34°C | 22°C | 42°C 2017 | 18°C 2014 | 32% |
| Sep 14 | 34°C | 22°C | 42°C 2017 | 17°C 2014 | 32% |
| Sep 15 | 34°C | 22°C | 39°C 2017 | 16°C 1993 | 32% |
| Sep 16 | 33°C | 22°C | 40°C 1997 | 16°C 1993 | 33% |
| Sep 17 | 33°C | 22°C | 40°C 2005 | 15°C 2008 | 33% |
| Sep 18 | 33°C | 21°C | 41°C 2019 | 15°C 1994 | 32% |
| Sep 19 | 33°C | 21°C | 41°C 2019 | 13°C 1991 | 30% |
| Sep 20 | 33°C | 21°C | 39°C 1992 | 12°C 1991 | 30% |
| Sep 21 | 33°C | 21°C | 41°C 1992 | 13°C 1995 | 28% |
| Sep 22 | 33°C | 21°C | 40°C 2000 | 10°C 1995 | 27% |
| Sep 23 | 33°C | 20°C | 40°C 2005 | 11°C 1995 | 25% |
| Sep 24 | 33°C | 20°C | 40°C 2005 | 15°C 1995 | 23% |
| Sep 25 | 33°C | 20°C | 43°C 2005 | 13°C 2001 | 22% |
| Sep 26 | 33°C | 20°C | 42°C 2005 | 10°C 2000 | 21% |
| Sep 27 | 33°C | 20°C | 41°C 2005 | 13°C 2000 | 20% |
| Sep 28 | 33°C | 20°C | 41°C 2005 | 13°C 1996 | 20% |
| Sep 29 | 33°C | 20°C | 37°C 2005 | 12°C 2020 | 19% |
| Sep 30 | 32°C | 19°C | 37°C 2005 | 13°C 2020 | 19% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CDT).
- September 1
- sunrise 7:20 AM, sunset 8:03 PM
- September 30
- sunrise 7:35 AM, sunset 7:29 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.