September weather in Mason, TX
The average temperature in Mason in September is 76.8°F (63.8°F–89.7°F). Average precipitation: 3.03 inches.
September is a fall month in Mason, and is warmer than the annual average of 66°F. Daily temperatures swing about 25.9°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 11m. For travel, September is hot.
Avg High
89.7°F
Avg Low
63.8°F
Precipitation
3.03 in
Daylight
12h 11m
September records in Mason
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 104.0°F (1959) | 59.0°F (1969) | 1.76 in (2003) |
| September 2 | 102.9°F (1957) | 55.0°F (1987) | 1.27 in (1986) |
| September 3 | 102.9°F (2023) | 53.1°F (1974) | 1.58 in (2010) |
| September 4 | 104.0°F (1985) | 54.0°F (1974) | 2.20 in (1950) |
| September 5 | 105.1°F (2000) | 51.1°F (1974) | 2.21 in (1943) |
| September 6 | 108.0°F (2000) | 50.0°F (1988) | 1.59 in (1944) |
| September 7 | 108.0°F (2000) | 51.1°F (1988) | 1.27 in (1958) |
| September 8 | 109.0°F (2023) | 51.1°F (1957) | 5.10 in (1980) |
| September 9 | 107.1°F (2023) | 48.9°F (1957) | 1.10 in (1952) |
| September 10 | 100.0°F (1961) | 46.0°F (1968) | 7.45 in (1952) |
| September 11 | 100.0°F (1989) | 46.0°F (1968) | 0.80 in (2013) |
| September 12 | 100.9°F (2000) | 48.0°F (1959) | 4.01 in (2003) |
| September 13 | 100.9°F (2011) | 50.0°F (1988) | 0.87 in (1974) |
| September 14 | 102.0°F (2011) | 50.0°F (1989) | 2.50 in (1993) |
| September 15 | 100.9°F (2011) | 46.9°F (1993) | 1.41 in (2003) |
| September 16 | 100.9°F (1965) | 50.0°F (1979) | 2.20 in (1987) |
| September 17 | 98.1°F (1965) | 43.0°F (1984) | 2.16 in (1972) |
| September 18 | 99.0°F (2021) | 46.9°F (1981) | 1.30 in (1998) |
| September 19 | 98.1°F (2016) | 42.1°F (1981) | 1.03 in (2003) |
| September 20 | 102.0°F (2023) | 42.1°F (1971) | 2.80 in (1964) |
| September 21 | 102.0°F (2021) | 43.0°F (1971) | 2.53 in (1965) |
| September 22 | 100.0°F (2023) | 36.0°F (1983) | 3.78 in (1972) |
| September 23 | 102.9°F (2023) | 41.0°F (1999) | 1.92 in (1970) |
| September 24 | 106.0°F (2023) | 42.1°F (1999) | 1.75 in (1964) |
| September 25 | 97.0°F (1977) | 37.0°F (1989) | 3.75 in (2000) |
| September 26 | 105.1°F (2005) | 39.9°F (2000) | 2.96 in (2016) |
| September 27 | 106.0°F (2005) | 39.9°F (1993) | 1.96 in (1946) |
| September 28 | 104.0°F (2011) | 39.9°F (1993) | 0.83 in (2012) |
| September 29 | 102.9°F (2005) | 43.0°F (1967) | 1.71 in (1945) |
| September 30 | 100.0°F (2011) | 41.0°F (1996) | 1.89 in (1959) |