Las Heras Weather in September
Average highs run from 10°C on September 1 to 15°C on September 30, and lows from -1°C to 2°C. Normal precipitation for the month is 18 mm over about 6 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
- 12°C
- Average low
- 0°C
- Precipitation
- 18 mm
- Reanalysis high
- 25°CSep 22, 2008
- Reanalysis low
- -11°CSep 13, 2000
- Daylight
- 11 h 00 min to 12 h 35 min
- Cloud cover
- 59%
- Humidity
- 68%
- Dew point
- -1°C
- Wind
- 22.0 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 | 10°C | -1°C | 14°C 2007 | -5°C 2010 | 19% |
| Sep 2 | 10°C | -1°C | 17°C 2004 | -4°C 2008 | 18% |
| Sep 3 | 10°C | -1°C | 17°C 1995 | -6°C 2008 | 19% |
| Sep 4 | 10°C | -1°C | 18°C 2015 | -5°C 2019 | 18% |
| Sep 5 | 11°C | -1°C | 17°C 2001 | -6°C 1997 | 17% |
| Sep 6 | 11°C | -1°C | 16°C 2006 | -5°C 2000 | 17% |
| Sep 7 | 11°C | -1°C | 17°C 2016 | -6°C 2000 | 16% |
| Sep 8 | 11°C | 0°C | 17°C 1992 | -4°C 2000 | 16% |
| Sep 9 | 11°C | 0°C | 18°C 1992 | -5°C 2015 | 16% |
| Sep 10 | 11°C | 0°C | 16°C 2018 | -5°C 1999 | 17% |
| Sep 11 | 11°C | 0°C | 18°C 1991 | -4°C 2013 | 16% |
| Sep 12 | 12°C | 0°C | 17°C 1993 | -9°C 2000 | 16% |
| Sep 13 | 12°C | 0°C | 17°C 2018 | -11°C 2000 | 15% |
| Sep 14 | 12°C | 0°C | 17°C 2008 | -11°C 2000 | 15% |
| Sep 15 | 12°C | 0°C | 18°C 2008 | -5°C 2015 | 15% |
| Sep 16 | 12°C | 0°C | 19°C 1996 | -3°C 2000 | 15% |
| Sep 17 | 12°C | 0°C | 23°C 1996 | -4°C 1998 | 15% |
| Sep 18 | 13°C | 0°C | 19°C 2011 | -4°C 1998 | 14% |
| Sep 19 | 13°C | 0°C | 17°C 1999 | -4°C 1998 | 14% |
| Sep 20 | 13°C | 1°C | 18°C 2016 | -4°C 2020 | 14% |
| Sep 21 | 13°C | 1°C | 20°C 1999 | -4°C 2011 | 14% |
| Sep 22 | 13°C | 1°C | 25°C 2008 | -4°C 2011 | 14% |
| Sep 23 | 14°C | 1°C | 19°C 1996 | -2°C 2004 | 15% |
| Sep 24 | 14°C | 1°C | 22°C 1996 | -4°C 1992 | 15% |
| Sep 25 | 14°C | 1°C | 22°C 1996 | -4°C 1992 | 15% |
| Sep 26 | 14°C | 1°C | 20°C 2005 | -4°C 1994 | 15% |
| Sep 27 | 14°C | 1°C | 22°C 2019 | -3°C 2013 | 15% |
| Sep 28 | 14°C | 1°C | 20°C 2012 | -3°C 2000 | 14% |
| Sep 29 | 14°C | 1°C | 23°C 2009 | -3°C 1994 | 15% |
| Sep 30 | 15°C | 2°C | 23°C 2008 | -4°C 2018 | 14% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 8:06 AM, sunset 7:06 PM
- September 30
- sunrise 7:09 AM, sunset 7:44 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.