September weather in Bay City, TX
The average temperature in Bay City in September is 78.3°F (68.6°F–88.1°F). Average precipitation: 5.79 inches.
September is a fall month in Bay City, and is warmer than the annual average of 68.8°F. Daily temperatures swing about 19.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 10m. For travel, September is a wet month.
Avg High
88.1°F
Avg Low
68.6°F
Precipitation
5.79 in
Daylight
12h 10m
September records in Bay City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (1954) | 61.0°F (2018) | 2.95 in (1970) |
| September 2 | 102.0°F (2000) | 63.0°F (1915) | 2.28 in (1984) |
| September 3 | 102.9°F (2000) | 45.0°F (1993) | 2.52 in (2018) |
| September 4 | 109.0°F (2000) | 57.9°F (1974) | 2.02 in (2018) |
| September 5 | 108.0°F (2000) | 50.0°F (1974) | 3.36 in (1968) |
| September 6 | 98.1°F (1912) | 51.1°F (1974) | 7.48 in (2002) |
| September 7 | 100.0°F (2023) | 54.0°F (1974) | 3.78 in (1964) |
| September 8 | 100.9°F (2023) | 52.0°F (2018) | 2.03 in (1958) |
| September 9 | 102.9°F (2023) | 57.0°F (1983) | 4.16 in (1998) |
| September 10 | 100.9°F (2023) | 48.9°F (2018) | 6.85 in (1998) |
| September 11 | 99.0°F (1954) | 57.9°F (2018) | 8.00 in (1961) |
| September 12 | 98.1°F (2023) | 44.1°F (2018) | 8.95 in (1961) |
| September 13 | 99.0°F (2023) | 59.0°F (2018) | 2.22 in (1970) |
| September 14 | 98.1°F (2011) | 55.9°F (1945) | 3.16 in (2002) |
| September 15 | 96.1°F (1953) | 55.9°F (1945) | 2.70 in (1998) |
| September 16 | 97.0°F (1954) | 57.0°F (1979) | 1.82 in (1971) |
| September 17 | 99.0°F (1953) | 59.0°F (1961) | 3.00 in (1969) |
| September 18 | 98.1°F (2004) | 52.0°F (1981) | 9.12 in (2019) |
| September 19 | 98.1°F (2004) | 52.0°F (1981) | 7.94 in (1979) |
| September 20 | 99.0°F (1999) | 57.0°F (1981) | 5.38 in (1979) |
| September 21 | 100.0°F (1956) | 54.0°F (1983) | 4.88 in (1967) |
| September 22 | 98.1°F (1944) | 51.1°F (1983) | 3.02 in (1997) |
| September 23 | 97.0°F (2005) | 53.1°F (1995) | 1.33 in (1997) |
| September 24 | 97.0°F (1950) | 50.0°F (1989) | 3.50 in (1957) |
| September 25 | 100.0°F (2005) | 51.1°F (1991) | 1.78 in (2018) |
| September 26 | 95.0°F (1980) | 53.1°F (1991) | 2.79 in (1950) |
| September 27 | 95.0°F (2005) | 46.0°F (1942) | 2.81 in (1944) |
| September 28 | 96.1°F (2005) | 46.0°F (1942) | 2.27 in (1964) |
| September 29 | 98.1°F (2000) | 48.0°F (1967) | 2.34 in (1988) |
| September 30 | 96.1°F (1998) | 46.9°F (1916) | 2.22 in (1985) |