September weather in Three Rivers, TX
The average temperature in Three Rivers in September is 80.3°F (70.0°F–90.7°F). Average precipitation: 3.62 inches.
September is a fall month in Three Rivers, and is warmer than the annual average of 70.5°F. Daily temperatures swing about 20.7°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 10m. For travel, September is hot.
Avg High
90.7°F
Avg Low
70.0°F
Precipitation
3.62 in
Daylight
12h 10m
September records in Three Rivers
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 107.1°F (2000) | 69.1°F (1985) | 1.60 in (2007) |
| September 2 | 107.1°F (2000) | 69.1°F (1987) | 1.00 in (2007) |
| September 3 | 106.0°F (2000) | 69.1°F (1990) | 0.95 in (2003) |
| September 4 | 107.1°F (2000) | 68.0°F (1987) | 1.55 in (2001) |
| September 5 | 109.0°F (2000) | 64.0°F (1984) | 1.05 in (2022) |
| September 6 | 111.9°F (2000) | 63.0°F (1984) | 1.36 in (2019) |
| September 7 | 104.0°F (2000) | 60.1°F (2011) | 1.10 in (2010) |
| September 8 | 102.0°F (1985) | 60.1°F (2011) | 1.26 in (2010) |
| September 9 | 100.9°F (1985) | 60.1°F (2017) | 2.30 in (2002) |
| September 10 | 102.9°F (1997) | 62.1°F (2017) | 3.35 in (2020) |
| September 11 | 100.9°F (1987) | 61.0°F (2020) | 1.48 in (1994) |
| September 12 | 102.0°F (2000) | 61.0°F (2017) | 4.02 in (2003) |
| September 13 | 102.0°F (2000) | 61.0°F (2017) | 0.68 in (1994) |
| September 14 | 100.9°F (1987) | 61.0°F (1989) | 1.84 in (1985) |
| September 15 | 100.0°F (1997) | 61.0°F (1993) | 2.57 in (2002) |
| September 16 | 100.0°F (1987) | 60.1°F (1989) | 1.20 in (2002) |
| September 17 | 102.0°F (1987) | 61.0°F (1989) | 2.02 in (1988) |
| September 18 | 102.0°F (1995) | 61.0°F (2000) | 2.95 in (2006) |
| September 19 | 100.9°F (2005) | 60.1°F (2000) | 0.64 in (2003) |
| September 20 | 100.0°F (1995) | 57.0°F (1991) | 1.66 in (1990) |
| September 21 | 100.0°F (1993) | 59.0°F (1991) | 2.43 in (2013) |
| September 22 | 102.9°F (1992) | 52.0°F (1995) | 1.50 in (1995) |
| September 23 | 102.0°F (2025) | 52.0°F (1995) | 0.98 in (2009) |
| September 24 | 104.0°F (2025) | 54.0°F (1995) | 2.83 in (2006) |
| September 25 | 105.1°F (2025) | 55.0°F (1989) | 1.11 in (2025) |
| September 26 | 109.0°F (2005) | 54.0°F (1991) | 1.50 in (2016) |
| September 27 | 104.0°F (2005) | 54.0°F (1991) | 1.43 in (2018) |
| September 28 | 102.0°F (2005) | 55.0°F (2000) | 1.80 in (2014) |
| September 29 | 105.1°F (2005) | 54.0°F (1996) | 0.29 in (1999) |
| September 30 | 99.0°F (2024) | 50.0°F (2020) | 1.60 in (2021) |