September weather in Simpson, LA
The average temperature in Simpson in September is 77.3°F (65.7°F–89.0°F). Average precipitation: 4.17 inches.
September is a fall month in Simpson, and is warmer than the annual average of 66.5°F. Daily temperatures swing about 23.3°F between overnight low and afternoon high. Daylight averages about 12h 11m. For travel, September is hot.
Avg High
89.0°F
Avg Low
65.7°F
Precipitation
4.17 in
Daylight
12h 11m
September records in Simpson
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (2011) | 61.0°F (2006) | 0.53 in (2022) |
| September 2 | 100.0°F (2013) | 57.0°F (2009) | 0.65 in (2022) |
| September 3 | 100.0°F (2023) | 63.0°F (2009) | 2.80 in (2011) |
| September 4 | 98.1°F (2013) | 60.1°F (2006) | 1.00 in (2024) |
| September 5 | 100.0°F (2023) | 61.0°F (2011) | 0.60 in (2024) |
| September 6 | 102.0°F (2019) | 53.1°F (2011) | 0.64 in (2007) |
| September 7 | 105.1°F (2023) | 50.0°F (2011) | 0.79 in (2022) |
| September 8 | 102.0°F (2019) | 55.0°F (2011) | 0.60 in (2018) |
| September 9 | 108.0°F (2011) | 54.0°F (2025) | 0.36 in (2016) |
| September 10 | 97.0°F (2019) | 54.0°F (2012) | 1.63 in (2006) |
| September 11 | 97.0°F (2019) | 57.0°F (2012) | 1.06 in (2024) |
| September 12 | 98.1°F (2013) | 55.0°F (2015) | 1.63 in (2009) |
| September 13 | 100.9°F (2019) | 51.1°F (2015) | 1.41 in (2007) |
| September 14 | 100.9°F (2019) | 48.9°F (2015) | 1.94 in (2021) |
| September 15 | 99.0°F (2019) | 59.0°F (2022) | 0.31 in (2009) |
| September 16 | 99.0°F (2013) | 55.9°F (2008) | 0.16 in (2012) |
| September 17 | 98.1°F (2013) | 54.0°F (2008) | 1.59 in (2012) |
| September 18 | 98.1°F (2013) | 57.0°F (2008) | 1.29 in (2006) |
| September 19 | 96.1°F (2010) | 55.0°F (2012) | 1.52 in (2010) |
| September 20 | 96.1°F (2023) | 51.1°F (2012) | 2.78 in (2013) |
| September 21 | 97.0°F (2022) | 53.1°F (2012) | 0.24 in (2021) |
| September 22 | 98.1°F (2022) | 55.9°F (2021) | 1.30 in (2018) |
| September 23 | 100.0°F (2023) | 53.1°F (2021) | 1.46 in (2006) |
| September 24 | 97.0°F (2022) | 53.1°F (2021) | 0.44 in (2009) |
| September 25 | 98.1°F (2022) | 54.0°F (2021) | 0.40 in (2010) |
| September 26 | 95.0°F (2011) | 52.0°F (2006) | 2.24 in (2018) |
| September 27 | 96.1°F (2023) | 52.0°F (2022) | 0.02 in (2007) |
| September 28 | 95.0°F (2011) | 51.1°F (2022) | 0.68 in (2021) |
| September 29 | 96.1°F (2011) | 51.1°F (2006) | 0.89 in (2013) |
| September 30 | 96.1°F (2023) | 45.0°F (2022) | 0.70 in (2012) |