September weather in Princeton, TX
The average temperature in Princeton in September is 76.9°F (65.5°F–88.3°F). Average precipitation: 2.81 inches.
September is a fall month in Princeton, and is warmer than the annual average of 65°F. Daily temperatures swing about 22.8°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 12m. For travel, September is hot.
Avg High
88.3°F
Avg Low
65.5°F
Precipitation
2.81 in
Daylight
12h 12m
September records in Princeton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 108.0°F (2000) | 61.0°F (2004) | 2.23 in (2003) |
| September 2 | 108.0°F (2000) | 63.0°F (2004) | 0.40 in (2020) |
| September 3 | 109.0°F (2000) | 62.1°F (2004) | 1.09 in (2018) |
| September 4 | 111.9°F (2000) | 60.1°F (2010) | 0.57 in (2006) |
| September 5 | 102.9°F (2012) | 57.9°F (2010) | 1.11 in (2025) |
| September 6 | 102.9°F (2012) | 55.9°F (2011) | 0.29 in (2004) |
| September 7 | 106.0°F (2023) | 51.1°F (2017) | 1.75 in (2010) |
| September 8 | 108.0°F (2023) | 54.0°F (2004) | 4.00 in (2010) |
| September 9 | 97.0°F (2014) | 51.1°F (2004) | 2.11 in (2020) |
| September 10 | 100.0°F (2014) | 52.0°F (2024) | 0.49 in (2007) |
| September 11 | 100.0°F (2000) | 55.0°F (2017) | 1.87 in (2003) |
| September 12 | 100.9°F (2011) | 55.0°F (2017) | 0.98 in (2009) |
| September 13 | 107.1°F (2011) | 54.0°F (2014) | 0.68 in (2008) |
| September 14 | 98.1°F (2005) | 52.0°F (2006) | 1.03 in (2009) |
| September 15 | 97.0°F (2019) | 51.1°F (2008) | 2.02 in (2001) |
| September 16 | 98.1°F (2013) | 46.9°F (2008) | 1.88 in (1998) |
| September 17 | 96.1°F (2004) | 50.0°F (2008) | 1.47 in (2006) |
| September 18 | 98.1°F (2005) | 48.9°F (2000) | 1.36 in (2011) |
| September 19 | 98.1°F (2024) | 50.0°F (2012) | 0.71 in (2013) |
| September 20 | 100.0°F (2021) | 53.1°F (2006) | 1.03 in (2013) |
| September 21 | 98.1°F (2005) | 53.1°F (1999) | 5.64 in (2018) |
| September 22 | 100.0°F (2005) | 45.0°F (1999) | 3.13 in (2018) |
| September 23 | 99.0°F (2005) | 46.0°F (1999) | 0.91 in (2024) |
| September 24 | 98.1°F (2023) | 48.9°F (2002) | 0.46 in (2023) |
| September 25 | 100.0°F (2005) | 45.0°F (2000) | 2.58 in (2016) |
| September 26 | 99.0°F (2005) | 41.0°F (2000) | 2.06 in (2016) |
| September 27 | 97.0°F (2005) | 43.0°F (2000) | 0.01 in (2017) |
| September 28 | 99.0°F (2005) | 45.0°F (2000) | 0.77 in (2013) |
| September 29 | 100.0°F (2011) | 46.9°F (2006) | 0.76 in (2012) |
| September 30 | 96.1°F (1998) | 43.0°F (1999) | 0.20 in (2012) |