September weather in Frankfort, IN
The average temperature in Frankfort in September is 65.8°F (54.4°F–77.2°F). Average precipitation: 3.06 inches.
September is a fall month in Frankfort, and is warmer than the annual average of 51.7°F. Daily temperatures swing about 22.8°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
77.2°F
Avg Low
54.4°F
Precipitation
3.06 in
Daylight
12h 15m
September records in Frankfort
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1953) | 36.0°F (1967) | 3.92 in (1950) |
| September 2 | 99.0°F (1953) | 39.0°F (1946) | 1.55 in (1993) |
| September 3 | 96.1°F (1922) | 42.1°F (1946) | 2.43 in (1932) |
| September 4 | 96.1°F (1922) | 39.9°F (1997) | 2.94 in (1918) |
| September 5 | 97.0°F (1922) | 42.1°F (1935) | 1.34 in (1920) |
| September 6 | 98.1°F (1922) | 39.0°F (1962) | 1.85 in (1971) |
| September 7 | 100.0°F (1939) | 37.9°F (1956) | 2.26 in (2012) |
| September 8 | 98.1°F (1922) | 34.0°F (1956) | 1.16 in (1992) |
| September 9 | 97.0°F (1933) | 37.9°F (1956) | 1.38 in (2016) |
| September 10 | 96.1°F (2013) | 37.9°F (1943) | 1.61 in (1937) |
| September 11 | 95.0°F (1933) | 37.9°F (1917) | 1.71 in (1921) |
| September 12 | 96.1°F (1939) | 32.0°F (1955) | 1.49 in (1936) |
| September 13 | 100.9°F (1939) | 36.0°F (1955) | 2.10 in (1991) |
| September 14 | 100.9°F (1939) | 30.9°F (1923) | 3.04 in (1965) |
| September 15 | 100.9°F (1939) | 35.1°F (1923) | 1.50 in (1934) |
| September 16 | 100.0°F (1939) | 32.0°F (1916) | 2.15 in (1969) |
| September 17 | 93.0°F (1927) | 32.0°F (1937) | 2.30 in (1969) |
| September 18 | 93.9°F (1955) | 30.9°F (1959) | 2.11 in (1923) |
| September 19 | 93.9°F (1955) | 33.1°F (1929) | 1.62 in (1988) |
| September 20 | 93.0°F (1940) | 35.1°F (1918) | 3.05 in (1957) |
| September 21 | 93.0°F (1940) | 33.1°F (1962) | 2.06 in (1992) |
| September 22 | 91.0°F (1931) | 34.0°F (1953) | 1.67 in (2021) |
| September 23 | 91.9°F (2017) | 28.0°F (1995) | 2.57 in (1955) |
| September 24 | 91.0°F (2017) | 30.0°F (1928) | 1.60 in (1961) |
| September 25 | 91.0°F (2007) | 30.0°F (1942) | 2.15 in (2018) |
| September 26 | 90.0°F (2017) | 28.9°F (1928) | 2.00 in (2003) |
| September 27 | 89.1°F (1998) | 28.9°F (1947) | 1.80 in (1933) |
| September 28 | 91.0°F (1939) | 26.1°F (1942) | 1.69 in (1945) |
| September 29 | 96.1°F (1953) | 30.0°F (1942) | 1.56 in (1972) |
| September 30 | 89.1°F (2019) | 30.0°F (1946) | 0.92 in (1965) |