September weather in Lebanon, SD
The average temperature in Lebanon in September is 61.0°F (48.2°F–73.8°F). Average precipitation: 2.01 inches.
September is a fall month in Lebanon, and is warmer than the annual average of 44.3°F. Daily temperatures swing about 25.6°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
73.8°F
Avg Low
48.2°F
Precipitation
2.01 in
Daylight
12h 18m
September records in Lebanon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1970) | 37.0°F (1946) | 1.25 in (1963) |
| September 2 | 98.1°F (1940) | 37.0°F (1946) | 2.27 in (1999) |
| September 3 | 102.0°F (1983) | 35.1°F (1974) | 0.81 in (1999) |
| September 4 | 100.0°F (1933) | 35.1°F (1961) | 0.67 in (1936) |
| September 5 | 104.0°F (1945) | 34.0°F (1965) | 2.10 in (2016) |
| September 6 | 102.9°F (1978) | 32.0°F (1956) | 0.80 in (2004) |
| September 7 | 105.1°F (1976) | 37.9°F (1986) | 1.90 in (1938) |
| September 8 | 105.1°F (1931) | 36.0°F (1992) | 0.47 in (1946) |
| September 9 | 106.0°F (1931) | 35.1°F (1943) | 0.53 in (2019) |
| September 10 | 107.1°F (1931) | 33.1°F (1940) | 0.70 in (1932) |
| September 11 | 98.1°F (1982) | 30.9°F (1955) | 0.55 in (1989) |
| September 12 | 100.0°F (1939) | 28.9°F (1989) | 1.23 in (1903) |
| September 13 | 93.9°F (1952) | 27.0°F (1949) | 2.13 in (1903) |
| September 14 | 100.0°F (1948) | 28.9°F (1903) | 1.05 in (1991) |
| September 15 | 102.0°F (1948) | 32.0°F (1903) | 0.78 in (2010) |
| September 16 | 96.1°F (1948) | 30.0°F (1973) | 0.95 in (1994) |
| September 17 | 95.0°F (1955) | 26.1°F (1903) | 1.40 in (1969) |
| September 18 | 98.1°F (1998) | 30.0°F (1971) | 1.70 in (1946) |
| September 19 | 95.0°F (1941) | 24.1°F (1991) | 1.20 in (1996) |
| September 20 | 96.1°F (1972) | 24.1°F (1991) | 1.20 in (1996) |
| September 21 | 93.0°F (1936) | 24.1°F (1934) | 1.75 in (1989) |
| September 22 | 97.0°F (1936) | 21.0°F (1995) | 0.95 in (1959) |
| September 23 | 93.9°F (1958) | 25.0°F (2000) | 0.67 in (2016) |
| September 24 | 91.9°F (2007) | 25.0°F (1942) | 1.50 in (2004) |
| September 25 | 91.9°F (1938) | 26.1°F (1942) | 0.85 in (1959) |
| September 26 | 91.0°F (1943) | 19.0°F (1942) | 0.52 in (1966) |
| September 27 | 97.0°F (1956) | 19.9°F (1942) | 0.55 in (1996) |
| September 28 | 89.1°F (1989) | 21.0°F (1942) | 0.27 in (2005) |
| September 29 | 91.0°F (2021) | 23.0°F (1976) | 0.78 in (1965) |
| September 30 | 96.1°F (1967) | 19.9°F (1974) | 1.13 in (2007) |