San Fernando Weather in September
Average highs run from 34°C on September 1 to 31°C on September 30, and lows from 25°C to 22°C. Normal precipitation for the month is 162 mm over about 15 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
- 33°C
- Average low
- 23°C
- Precipitation
- 162 mm
- Reanalysis high
- 42°CSep 4, 2011
- Reanalysis low
- 14°CSep 26, 1991
- Daylight
- 12 h 37 min to 11 h 56 min
- Cloud cover
- 48%
- Humidity
- 76%
- Dew point
- 22°C
- Wind
- 14.0 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 | 34°C | 25°C | 39°C 2020 | 22°C 2008 | 50% |
| Sep 2 | 34°C | 25°C | 39°C 2011 | 23°C 2008 | 51% |
| Sep 3 | 34°C | 24°C | 38°C 2000 | 23°C 1994 | 52% |
| Sep 4 | 34°C | 24°C | 42°C 2011 | 22°C 1994 | 54% |
| Sep 5 | 33°C | 24°C | 41°C 2000 | 22°C 1994 | 56% |
| Sep 6 | 33°C | 24°C | 41°C 2000 | 23°C 2007 | 57% |
| Sep 7 | 33°C | 24°C | 40°C 2002 | 22°C 2011 | 58% |
| Sep 8 | 33°C | 24°C | 39°C 2002 | 20°C 2011 | 59% |
| Sep 9 | 33°C | 24°C | 38°C 2000 | 20°C 2004 | 59% |
| Sep 10 | 33°C | 24°C | 39°C 2000 | 20°C 2017 | 58% |
| Sep 11 | 33°C | 24°C | 37°C 2000 | 20°C 2017 | 56% |
| Sep 12 | 33°C | 24°C | 38°C 2011 | 19°C 2017 | 55% |
| Sep 13 | 33°C | 24°C | 38°C 2011 | 20°C 2017 | 54% |
| Sep 14 | 33°C | 24°C | 38°C 2011 | 20°C 2017 | 52% |
| Sep 15 | 33°C | 24°C | 39°C 2009 | 19°C 1993 | 52% |
| Sep 16 | 33°C | 24°C | 38°C 2009 | 18°C 2008 | 54% |
| Sep 17 | 32°C | 24°C | 37°C 1997 | 17°C 2008 | 54% |
| Sep 18 | 32°C | 23°C | 36°C 2012 | 17°C 2008 | 53% |
| Sep 19 | 32°C | 23°C | 37°C 2016 | 17°C 2008 | 53% |
| Sep 20 | 32°C | 23°C | 37°C 2000 | 18°C 1991 | 53% |
| Sep 21 | 32°C | 23°C | 38°C 2000 | 17°C 2020 | 50% |
| Sep 22 | 32°C | 23°C | 37°C 2011 | 15°C 1995 | 48% |
| Sep 23 | 32°C | 23°C | 39°C 2005 | 15°C 1995 | 46% |
| Sep 24 | 32°C | 23°C | 41°C 2005 | 17°C 2009 | 44% |
| Sep 25 | 32°C | 22°C | 39°C 2011 | 16°C 1991 | 43% |
| Sep 26 | 32°C | 22°C | 39°C 2011 | 14°C 1991 | 43% |
| Sep 27 | 32°C | 22°C | 37°C 2005 | 16°C 1991 | 42% |
| Sep 28 | 32°C | 22°C | 38°C 2005 | 16°C 2010 | 42% |
| Sep 29 | 32°C | 22°C | 37°C 2011 | 16°C 2010 | 42% |
| Sep 30 | 31°C | 22°C | 36°C 2005 | 14°C 2020 | 41% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CST).
- September 1
- sunrise 6:14 AM, sunset 6:51 PM
- September 30
- sunrise 6:24 AM, sunset 6:20 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.