September weather in Napoleon, ND
The average temperature in Napoleon in September is 58.6°F (46.1°F–71.1°F). Average precipitation: 1.79 inches.
September is a fall month in Napoleon, and is warmer than the annual average of 41.2°F. Daily temperatures swing about 25°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
71.1°F
Avg Low
46.1°F
Precipitation
1.79 in
Daylight
12h 19m
September records in Napoleon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (1929) | 30.9°F (1917) | 1.50 in (2016) |
| September 2 | 100.9°F (1983) | 30.0°F (1917) | 3.20 in (1973) |
| September 3 | 102.0°F (1925) | 30.0°F (1928) | 1.85 in (1973) |
| September 4 | 100.9°F (1922) | 30.0°F (1905) | 1.25 in (1929) |
| September 5 | 102.0°F (1913) | 28.0°F (1965) | 0.80 in (2016) |
| September 6 | 102.0°F (1978) | 28.0°F (1929) | 2.30 in (1995) |
| September 7 | 107.1°F (1897) | 30.9°F (2024) | 2.25 in (2010) |
| September 8 | 102.9°F (1906) | 32.0°F (1907) | 1.29 in (1968) |
| September 9 | 100.0°F (1906) | 23.0°F (1898) | 1.16 in (2013) |
| September 10 | 97.0°F (1952) | 24.1°F (1943) | 1.00 in (1924) |
| September 11 | 98.1°F (1982) | 19.0°F (1964) | 0.89 in (2009) |
| September 12 | 93.0°F (1969) | 21.0°F (1902) | 2.05 in (1978) |
| September 13 | 93.0°F (1927) | 27.0°F (1923) | 0.96 in (1922) |
| September 14 | 91.9°F (1908) | 23.0°F (1903) | 1.20 in (1928) |
| September 15 | 100.0°F (1935) | 19.0°F (1934) | 1.28 in (1991) |
| September 16 | 91.9°F (1908) | 25.0°F (1918) | 0.82 in (1896) |
| September 17 | 96.1°F (1908) | 25.0°F (1901) | 1.55 in (1986) |
| September 18 | 98.1°F (1914) | 19.9°F (1929) | 1.93 in (1977) |
| September 19 | 96.1°F (1914) | 19.9°F (1893) | 1.11 in (1988) |
| September 20 | 96.1°F (1914) | 18.0°F (1918) | 1.20 in (1996) |
| September 21 | 97.0°F (1922) | 17.1°F (1934) | 1.42 in (2018) |
| September 22 | 100.0°F (1936) | 18.0°F (1947) | 0.70 in (2000) |
| September 23 | 93.9°F (1958) | 21.9°F (1928) | 0.82 in (2006) |
| September 24 | 89.1°F (1958) | 21.9°F (1926) | 1.32 in (1973) |
| September 25 | 95.0°F (1938) | 12.0°F (1926) | 1.11 in (1910) |
| September 26 | 90.0°F (1952) | 12.9°F (1942) | 0.90 in (1942) |
| September 27 | 96.1°F (1956) | 14.0°F (1893) | 0.50 in (1904) |
| September 28 | 93.9°F (1905) | 14.0°F (1945) | 0.44 in (1972) |
| September 29 | 91.9°F (1905) | 10.0°F (1907) | 1.07 in (1965) |
| September 30 | 93.9°F (1992) | 12.9°F (1907) | 0.60 in (1905) |