Santiago Weather in September
Average highs run from 23°C on September 1 to 25°C on September 30, and lows from 10°C to 12°C. Normal precipitation for the month is 135 mm over about 11 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
- 24°C
- Average low
- 11°C
- Precipitation
- 135 mm
- Reanalysis high
- 34°CSep 7, 2004
- Reanalysis low
- -1°CSep 5, 2006
- Daylight
- 11 h 31 min to 12 h 21 min
- Cloud cover
- 55%
- Humidity
- 80%
- Dew point
- 13°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 | 23°C | 10°C | 31°C 1997 | 1°C 2002 | 32% |
| Sep 2 | 23°C | 11°C | 32°C 2012 | 2°C 2002 | 32% |
| Sep 3 | 23°C | 11°C | 30°C 2017 | 1°C 2002 | 32% |
| Sep 4 | 23°C | 11°C | 32°C 2004 | 0°C 2006 | 33% |
| Sep 5 | 23°C | 11°C | 34°C 2004 | -1°C 2006 | 35% |
| Sep 6 | 23°C | 11°C | 34°C 2004 | 0°C 2006 | 37% |
| Sep 7 | 23°C | 11°C | 34°C 2004 | 3°C 1996 | 37% |
| Sep 8 | 23°C | 11°C | 32°C 2007 | 2°C 2008 | 37% |
| Sep 9 | 23°C | 11°C | 31°C 2013 | 1°C 1996 | 37% |
| Sep 10 | 23°C | 11°C | 33°C 2013 | 2°C 1996 | 38% |
| Sep 11 | 23°C | 11°C | 33°C 2013 | 1°C 2003 | 38% |
| Sep 12 | 23°C | 11°C | 32°C 2013 | 2°C 2003 | 39% |
| Sep 13 | 23°C | 11°C | 33°C 1991 | 3°C 2015 | 39% |
| Sep 14 | 23°C | 11°C | 32°C 2012 | 2°C 2008 | 39% |
| Sep 15 | 23°C | 11°C | 32°C 2019 | 3°C 2008 | 40% |
| Sep 16 | 24°C | 11°C | 32°C 2012 | 3°C 2001 | 41% |
| Sep 17 | 23°C | 11°C | 34°C 2012 | 1°C 2001 | 41% |
| Sep 18 | 23°C | 11°C | 31°C 2012 | 4°C 2013 | 40% |
| Sep 19 | 24°C | 11°C | 32°C 2004 | 3°C 2013 | 40% |
| Sep 20 | 24°C | 11°C | 33°C 1994 | 2°C 1995 | 38% |
| Sep 21 | 24°C | 11°C | 33°C 2015 | 2°C 1998 | 38% |
| Sep 22 | 24°C | 11°C | 33°C 1994 | 4°C 1998 | 39% |
| Sep 23 | 24°C | 11°C | 34°C 1994 | 6°C 2012 | 39% |
| Sep 24 | 24°C | 11°C | 33°C 1994 | 6°C 2007 | 40% |
| Sep 25 | 24°C | 11°C | 31°C 2020 | 2°C 2000 | 40% |
| Sep 26 | 24°C | 11°C | 31°C 2020 | 1°C 1992 | 41% |
| Sep 27 | 24°C | 12°C | 28°C 1997 | 3°C 1992 | 41% |
| Sep 28 | 24°C | 12°C | 31°C 2018 | 5°C 1998 | 42% |
| Sep 29 | 24°C | 12°C | 33°C 2011 | 4°C 2009 | 42% |
| Sep 30 | 25°C | 12°C | 34°C 2020 | 5°C 2009 | 43% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 6:54 AM, sunset 6:25 PM
- September 30
- sunrise 6:19 AM, sunset 6:40 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 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.