September weather in Port St. Joe, FL
The average temperature in Port St. Joe in September is 79.2°F (71.6°F–86.7°F). Average precipitation: 5.38 inches.
September is a fall month in Port St. Joe, and is warmer than the annual average of 69.1°F. Daily temperatures swing about 15.1°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 12h 10m. For travel, September is a wet month.
Avg High
86.7°F
Avg Low
71.6°F
Precipitation
5.38 in
Daylight
12h 10m
September records in Port St. Joe
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.9°F (2007) | 71.1°F (2025) | 3.47 in (2016) |
| September 2 | 93.9°F (2024) | 66.0°F (2025) | 4.06 in (2023) |
| September 3 | 91.9°F (1999) | 70.0°F (1999) | 0.66 in (2007) |
| September 4 | 96.1°F (2019) | 69.1°F (1998) | 2.84 in (2011) |
| September 5 | 97.0°F (2019) | 71.1°F (2004) | 1.26 in (2011) |
| September 6 | 93.0°F (2019) | 66.9°F (2011) | 3.26 in (2007) |
| September 7 | 93.0°F (2019) | 62.1°F (2011) | 1.12 in (2024) |
| September 8 | 91.0°F (2005) | 59.0°F (2011) | 2.10 in (2021) |
| September 9 | 91.0°F (1999) | 60.1°F (2011) | 5.89 in (2022) |
| September 10 | 91.0°F (2007) | 64.0°F (2011) | 0.86 in (2014) |
| September 11 | 91.9°F (2010) | 63.0°F (2017) | 1.96 in (2006) |
| September 12 | 93.0°F (2010) | 64.9°F (2003) | 6.29 in (2024) |
| September 13 | 93.0°F (2010) | 59.0°F (2015) | 5.61 in (2024) |
| September 14 | 93.9°F (2018) | 55.0°F (2015) | 3.26 in (2020) |
| September 15 | 93.9°F (1999) | 64.0°F (2025) | 4.96 in (2020) |
| September 16 | 91.9°F (2005) | 60.1°F (2001) | 3.63 in (2020) |
| September 17 | 98.1°F (2019) | 61.0°F (2000) | 4.89 in (1998) |
| September 18 | 97.0°F (2019) | 60.1°F (2000) | 1.97 in (2012) |
| September 19 | 91.9°F (2018) | 61.0°F (2003) | 1.99 in (1999) |
| September 20 | 91.9°F (2005) | 64.0°F (2004) | 1.11 in (2002) |
| September 21 | 91.0°F (2005) | 59.0°F (2006) | 2.15 in (2007) |
| September 22 | 93.9°F (2022) | 59.0°F (1999) | 9.56 in (2000) |
| September 23 | 91.9°F (1998) | 57.9°F (1999) | 0.55 in (2013) |
| September 24 | 91.9°F (2019) | 59.0°F (2021) | 2.72 in (2001) |
| September 25 | 93.9°F (2019) | 57.0°F (2008) | 2.09 in (2024) |
| September 26 | 95.0°F (2019) | 55.0°F (2008) | 7.45 in (2024) |
| September 27 | 91.9°F (2011) | 53.1°F (2001) | 7.95 in (2020) |
| September 28 | 91.0°F (2007) | 55.0°F (2008) | 2.47 in (2014) |
| September 29 | 91.0°F (2018) | 57.0°F (2006) | 0.68 in (2014) |
| September 30 | 90.0°F (2011) | 53.1°F (2006) | 0.80 in (2017) |