September weather in Napoleon, IN
The average temperature in Napoleon in September is 67.5°F (57.3°F–77.7°F). Average precipitation: 3.24 inches.
September is a fall month in Napoleon, and is warmer than the annual average of 53.6°F. Daily temperatures swing about 20.4°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 14m. For travel, September is one of the best months of the year to visit.
Avg High
77.7°F
Avg Low
57.3°F
Precipitation
3.24 in
Daylight
12h 14m
September records in Napoleon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (1953) | 41.0°F (1963) | 3.58 in (1902) |
| September 2 | 104.0°F (1953) | 39.9°F (1965) | 3.54 in (2003) |
| September 3 | 99.0°F (1913) | 43.0°F (1952) | 1.90 in (1926) |
| September 4 | 97.0°F (1954) | 41.0°F (1952) | 1.80 in (1991) |
| September 5 | 100.0°F (1899) | 39.0°F (1957) | 2.08 in (1926) |
| September 6 | 100.9°F (1954) | 35.1°F (1924) | 1.60 in (2012) |
| September 7 | 98.1°F (1925) | 35.1°F (2014) | 1.17 in (2009) |
| September 8 | 99.0°F (1939) | 39.9°F (1956) | 2.79 in (2018) |
| September 9 | 99.0°F (1933) | 39.9°F (1956) | 1.32 in (2007) |
| September 10 | 97.0°F (1964) | 35.1°F (1924) | 2.89 in (2001) |
| September 11 | 97.0°F (1933) | 37.0°F (1917) | 2.21 in (1938) |
| September 12 | 93.9°F (1908) | 34.0°F (1955) | 1.87 in (1986) |
| September 13 | 97.0°F (1939) | 30.9°F (1953) | 1.61 in (2006) |
| September 14 | 99.0°F (1936) | 28.9°F (1964) | 1.57 in (1898) |
| September 15 | 99.0°F (1939) | 36.0°F (1964) | 1.28 in (1956) |
| September 16 | 95.0°F (1936) | 32.0°F (1966) | 1.85 in (1911) |
| September 17 | 95.0°F (1931) | 37.0°F (1951) | 1.10 in (1913) |
| September 18 | 96.1°F (1953) | 34.0°F (1903) | 1.02 in (1921) |
| September 19 | 93.0°F (1955) | 36.0°F (1973) | 1.74 in (1990) |
| September 20 | 93.9°F (1908) | 33.1°F (1956) | 1.40 in (1971) |
| September 21 | 96.1°F (1909) | 30.9°F (1962) | 1.90 in (1932) |
| September 22 | 96.1°F (1909) | 30.0°F (1953) | 1.18 in (2003) |
| September 23 | 91.0°F (1908) | 30.9°F (1918) | 1.51 in (1955) |
| September 24 | 96.1°F (2010) | 33.1°F (1928) | 1.54 in (2001) |
| September 25 | 93.0°F (1908) | 30.0°F (1965) | 3.41 in (1898) |
| September 26 | 90.0°F (1908) | 34.0°F (1928) | 1.82 in (1970) |
| September 27 | 89.1°F (1905) | 30.9°F (1918) | 2.00 in (2002) |
| September 28 | 90.0°F (1905) | 28.0°F (1942) | 1.60 in (1916) |
| September 29 | 100.0°F (1953) | 28.9°F (1962) | 1.52 in (1934) |
| September 30 | 93.9°F (1953) | 26.1°F (1899) | 1.18 in (1927) |