September weather in Llano, TX
The average temperature in Llano in September is 78.1°F (65.6°F–90.5°F). Average precipitation: 2.34 inches.
September is a fall month in Llano, and is warmer than the annual average of 67.1°F. Daily temperatures swing about 24.9°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 11m. For travel, September is hot.
Avg High
90.5°F
Avg Low
65.6°F
Precipitation
2.34 in
Daylight
12h 11m
September records in Llano
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 109.0°F (1952) | 55.9°F (1915) | 2.10 in (1986) |
| September 2 | 109.0°F (1952) | 55.0°F (1915) | 1.64 in (1981) |
| September 3 | 107.1°F (1939) | 55.9°F (1915) | 1.92 in (1932) |
| September 4 | 106.0°F (1985) | 39.9°F (1934) | 2.40 in (1904) |
| September 5 | 107.1°F (2000) | 48.9°F (1934) | 1.79 in (2007) |
| September 6 | 109.9°F (2000) | 45.0°F (1984) | 2.60 in (1929) |
| September 7 | 105.1°F (1951) | 48.9°F (2011) | 1.98 in (1929) |
| September 8 | 105.1°F (2023) | 50.0°F (2017) | 4.10 in (2002) |
| September 9 | 108.0°F (2023) | 52.0°F (1956) | 2.30 in (2020) |
| September 10 | 104.0°F (1937) | 48.9°F (1968) | 2.20 in (1952) |
| September 11 | 105.1°F (1950) | 48.9°F (1968) | 12.53 in (1952) |
| September 12 | 102.0°F (1930) | 48.9°F (1960) | 2.60 in (2009) |
| September 13 | 102.9°F (2011) | 52.0°F (1940) | 3.00 in (1924) |
| September 14 | 104.0°F (2011) | 48.0°F (1945) | 2.12 in (1968) |
| September 15 | 102.0°F (1965) | 48.9°F (1945) | 3.47 in (1936) |
| September 16 | 100.9°F (1965) | 48.9°F (1934) | 5.59 in (1936) |
| September 17 | 100.9°F (1933) | 46.9°F (1979) | 0.80 in (1899) |
| September 18 | 102.0°F (1933) | 46.9°F (1981) | 1.50 in (1923) |
| September 19 | 102.0°F (1933) | 43.0°F (1981) | 1.80 in (1905) |
| September 20 | 102.9°F (1933) | 43.0°F (1981) | 1.40 in (2014) |
| September 21 | 104.0°F (1926) | 41.0°F (1971) | 1.00 in (1923) |
| September 22 | 107.1°F (1926) | 39.0°F (1983) | 3.17 in (1957) |
| September 23 | 105.1°F (1920) | 39.0°F (1999) | 1.94 in (1928) |
| September 24 | 102.9°F (1920) | 42.1°F (1975) | 3.12 in (1955) |
| September 25 | 105.1°F (1931) | 42.1°F (2007) | 1.86 in (2000) |
| September 26 | 109.0°F (2005) | 43.0°F (1975) | 2.96 in (2016) |
| September 27 | 109.0°F (2005) | 35.1°F (1942) | 3.25 in (1936) |
| September 28 | 111.9°F (1953) | 39.9°F (1942) | 1.40 in (1895) |
| September 29 | 108.0°F (2005) | 42.1°F (1942) | 4.30 in (1945) |
| September 30 | 102.0°F (1953) | 39.0°F (1972) | 1.35 in (1954) |