September weather in McAllen, TX
The average temperature in McAllen in September is 83.7°F (73.4°F–94.0°F). Average precipitation: 3.81 inches.
September is a fall month in McAllen, and is warmer than the annual average of 75.5°F. Daily temperatures swing about 20.6°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 9m. For travel, September is hot.
Avg High
94.0°F
Avg Low
73.4°F
Precipitation
3.81 in
Daylight
12h 9m
September records in McAllen
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 106.0°F (2012) | 69.1°F (1975) | 3.04 in (1975) |
| September 2 | 102.0°F (2000) | 64.0°F (2004) | 2.15 in (1990) |
| September 3 | 102.9°F (1985) | 64.0°F (2004) | 1.23 in (2004) |
| September 4 | 105.1°F (2011) | 69.1°F (1946) | 2.28 in (2010) |
| September 5 | 106.0°F (2011) | 63.0°F (1974) | 2.05 in (1991) |
| September 6 | 108.0°F (2000) | 59.0°F (1974) | 1.50 in (2020) |
| September 7 | 104.0°F (2000) | 60.1°F (1974) | 2.21 in (2022) |
| September 8 | 102.0°F (2012) | 59.0°F (1974) | 0.51 in (1943) |
| September 9 | 104.0°F (2023) | 55.0°F (2004) | 1.30 in (1948) |
| September 10 | 100.9°F (1962) | 55.0°F (1974) | 2.87 in (1948) |
| September 11 | 102.0°F (2016) | 64.9°F (1971) | 1.15 in (1998) |
| September 12 | 100.9°F (2016) | 64.0°F (1943) | 2.38 in (2015) |
| September 13 | 102.0°F (1961) | 63.0°F (1959) | 2.73 in (1963) |
| September 14 | 102.0°F (2016) | 60.1°F (1945) | 3.19 in (1951) |
| September 15 | 102.0°F (2016) | 59.0°F (1945) | 5.67 in (1973) |
| September 16 | 100.9°F (2009) | 59.0°F (1945) | 2.79 in (1988) |
| September 17 | 102.0°F (1968) | 61.0°F (1945) | 2.16 in (2024) |
| September 18 | 102.9°F (2016) | 61.0°F (1945) | 1.86 in (1948) |
| September 19 | 104.0°F (2016) | 54.0°F (1981) | 2.40 in (2003) |
| September 20 | 102.9°F (2016) | 57.0°F (1981) | 3.48 in (1963) |
| September 21 | 102.0°F (1947) | 57.9°F (1991) | 5.52 in (1967) |
| September 22 | 100.9°F (2016) | 59.0°F (1995) | 6.06 in (1967) |
| September 23 | 100.0°F (2023) | 55.9°F (1975) | 4.18 in (1974) |
| September 24 | 104.0°F (2005) | 55.9°F (1975) | 1.68 in (1960) |
| September 25 | 122.0°F (1986) | 57.0°F (1975) | 2.95 in (1965) |
| September 26 | 109.0°F (1986) | 57.9°F (1975) | 2.85 in (1983) |
| September 27 | 109.0°F (1986) | 57.0°F (1942) | 1.56 in (2015) |
| September 28 | 100.9°F (2005) | 50.0°F (1942) | 2.57 in (1987) |
| September 29 | 104.0°F (2005) | 51.1°F (1967) | 0.92 in (1971) |
| September 30 | 100.0°F (2005) | 54.0°F (1967) | 3.20 in (1985) |