San Lorenzo Weather in September
Average highs run from 19°C on September 1 to 20°C on September 30, and lows from 2°C to 3°C. Normal precipitation for the month is 6 mm over about 0 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
- 19°C
- Average low
- 3°C
- Precipitation
- 6 mm
- Reanalysis high
- 29°CSep 12, 2016
- Reanalysis low
- -6°CSep 12, 2005
- Daylight
- 11 h 38 min to 12 h 18 min
- Cloud cover
- 43%
- Humidity
- 39%
- Dew point
- -6°C
- Wind
- 11.2 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 | 19°C | 2°C | 25°C 2008 | -4°C 2005 | 2% |
| Sep 2 | 19°C | 2°C | 27°C 2008 | -4°C 1992 | 2% |
| Sep 3 | 19°C | 2°C | 25°C 2011 | -4°C 2016 | 2% |
| Sep 4 | 19°C | 2°C | 26°C 2004 | -4°C 2016 | 3% |
| Sep 5 | 19°C | 2°C | 25°C 2004 | -4°C 2016 | 3% |
| Sep 6 | 19°C | 2°C | 27°C 1993 | -4°C 2008 | 3% |
| Sep 7 | 19°C | 2°C | 27°C 1997 | -1°C 1998 | 3% |
| Sep 8 | 19°C | 2°C | 27°C 1997 | -3°C 2003 | 2% |
| Sep 9 | 19°C | 2°C | 25°C 2014 | -5°C 2003 | 2% |
| Sep 10 | 19°C | 2°C | 25°C 2013 | -5°C 2009 | 2% |
| Sep 11 | 19°C | 2°C | 24°C 2006 | -5°C 2005 | 2% |
| Sep 12 | 19°C | 2°C | 29°C 2016 | -6°C 2005 | 2% |
| Sep 13 | 19°C | 2°C | 24°C 2007 | -4°C 2005 | 2% |
| Sep 14 | 19°C | 3°C | 24°C 2012 | -2°C 2005 | 2% |
| Sep 15 | 19°C | 3°C | 27°C 2019 | -3°C 2005 | 2% |
| Sep 16 | 19°C | 3°C | 25°C 2012 | -3°C 2005 | 3% |
| Sep 17 | 19°C | 3°C | 25°C 2016 | -3°C 2005 | 4% |
| Sep 18 | 19°C | 3°C | 27°C 2004 | -2°C 2013 | 5% |
| Sep 19 | 19°C | 3°C | 27°C 1994 | -4°C 1998 | 4% |
| Sep 20 | 20°C | 3°C | 28°C 1994 | -4°C 1995 | 5% |
| Sep 21 | 20°C | 3°C | 26°C 2015 | -1°C 1995 | 5% |
| Sep 22 | 20°C | 3°C | 26°C 2018 | -1°C 2013 | 6% |
| Sep 23 | 20°C | 3°C | 27°C 1994 | -3°C 2013 | 6% |
| Sep 24 | 20°C | 3°C | 24°C 2020 | -3°C 2013 | 6% |
| Sep 25 | 20°C | 3°C | 28°C 2020 | -2°C 2007 | 6% |
| Sep 26 | 20°C | 3°C | 27°C 2020 | -3°C 1996 | 6% |
| Sep 27 | 20°C | 3°C | 25°C 2004 | -1°C 2007 | 7% |
| Sep 28 | 20°C | 3°C | 25°C 2011 | -2°C 2009 | 8% |
| Sep 29 | 20°C | 3°C | 27°C 2018 | -3°C 1995 | 8% |
| Sep 30 | 20°C | 3°C | 28°C 2019 | -1°C 1995 | 8% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 7:33 AM, sunset 7:11 PM
- September 30
- sunrise 7:03 AM, sunset 7:21 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.