September weather in Boerne, TX
The average temperature in Boerne in September is 76.8°F (65.1°F–88.5°F). Average precipitation: 3.90 inches.
September is a fall month in Boerne, and is warmer than the annual average of 66.5°F. Daily temperatures swing about 23.4°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
88.5°F
Avg Low
65.1°F
Precipitation
3.90 in
Daylight
12h 10m
September records in Boerne
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (1951) | 55.0°F (1915) | 2.97 in (1986) |
| September 2 | 102.0°F (2000) | 48.0°F (1934) | 1.93 in (1976) |
| September 3 | 102.9°F (2000) | 55.9°F (1955) | 1.94 in (1923) |
| September 4 | 104.0°F (2000) | 54.0°F (1974) | 2.02 in (2024) |
| September 5 | 108.0°F (2000) | 48.9°F (1974) | 2.11 in (2004) |
| September 6 | 109.0°F (2000) | 46.9°F (1974) | 2.51 in (1935) |
| September 7 | 102.0°F (2023) | 46.9°F (1974) | 3.55 in (1958) |
| September 8 | 102.9°F (2023) | 46.9°F (1918) | 6.33 in (2010) |
| September 9 | 106.0°F (2023) | 48.9°F (1918) | 6.45 in (1921) |
| September 10 | 102.0°F (1912) | 50.0°F (1918) | 7.41 in (1952) |
| September 11 | 100.9°F (2023) | 51.1°F (1968) | 4.63 in (1952) |
| September 12 | 100.0°F (1911) | 46.0°F (1968) | 5.00 in (1904) |
| September 13 | 106.0°F (1912) | 46.9°F (1940) | 1.86 in (1986) |
| September 14 | 100.9°F (1930) | 46.0°F (1913) | 4.00 in (1919) |
| September 15 | 100.9°F (1911) | 50.0°F (1945) | 3.40 in (1936) |
| September 16 | 100.0°F (1911) | 50.0°F (1945) | 2.35 in (1943) |
| September 17 | 100.0°F (1911) | 48.0°F (1979) | 2.40 in (1946) |
| September 18 | 100.0°F (1911) | 45.0°F (1951) | 1.93 in (1988) |
| September 19 | 100.0°F (1911) | 43.0°F (1981) | 0.78 in (1987) |
| September 20 | 99.0°F (1911) | 39.0°F (1913) | 1.87 in (1918) |
| September 21 | 102.0°F (1926) | 42.1°F (1912) | 2.09 in (1919) |
| September 22 | 100.0°F (1909) | 37.0°F (1983) | 3.95 in (1957) |
| September 23 | 98.1°F (1908) | 37.0°F (1983) | 5.92 in (1971) |
| September 24 | 100.0°F (2023) | 41.0°F (1999) | 1.81 in (1925) |
| September 25 | 104.0°F (2023) | 42.1°F (1989) | 2.79 in (1916) |
| September 26 | 104.0°F (2005) | 39.9°F (1975) | 2.20 in (1896) |
| September 27 | 104.0°F (2005) | 37.0°F (1909) | 4.47 in (1964) |
| September 28 | 102.0°F (2005) | 39.0°F (1942) | 1.35 in (1895) |
| September 29 | 102.0°F (2005) | 37.9°F (1908) | 4.84 in (1945) |
| September 30 | 96.1°F (1926) | 35.1°F (1908) | 1.60 in (1985) |