September weather in Ottawa, KS
The average temperature in Ottawa in September is 68.2°F (56.0°F–80.3°F). Average precipitation: 4.05 inches.
September is a fall month in Ottawa, and is warmer than the annual average of 54.5°F. Daily temperatures swing about 24.3°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
80.3°F
Avg Low
56.0°F
Precipitation
4.05 in
Daylight
12h 14m
September records in Ottawa
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 107.1°F (2000) | 43.0°F (1903) | 2.92 in (2014) |
| September 2 | 109.0°F (2000) | 44.1°F (1949) | 2.77 in (1904) |
| September 3 | 111.0°F (1947) | 44.1°F (1974) | 2.19 in (1942) |
| September 4 | 104.0°F (1947) | 43.0°F (1905) | 4.10 in (1961) |
| September 5 | 107.1°F (1913) | 42.1°F (1974) | 2.27 in (1940) |
| September 6 | 105.1°F (1936) | 43.0°F (1988) | 1.27 in (1943) |
| September 7 | 109.0°F (1947) | 41.0°F (1898) | 2.55 in (1909) |
| September 8 | 100.9°F (1922) | 39.9°F (1898) | 3.48 in (2003) |
| September 9 | 100.0°F (1955) | 41.0°F (1943) | 5.72 in (1915) |
| September 10 | 100.9°F (1936) | 41.0°F (1929) | 2.83 in (1901) |
| September 11 | 102.9°F (2000) | 39.9°F (1940) | 2.65 in (1975) |
| September 12 | 104.0°F (1956) | 36.0°F (1902) | 1.95 in (1926) |
| September 13 | 100.0°F (1911) | 30.0°F (1902) | 6.32 in (1961) |
| September 14 | 100.0°F (1939) | 37.0°F (2014) | 5.76 in (1998) |
| September 15 | 100.0°F (1939) | 34.0°F (1904) | 2.30 in (1958) |
| September 16 | 100.0°F (1931) | 39.9°F (1903) | 2.42 in (2010) |
| September 17 | 100.0°F (1953) | 36.0°F (1903) | 2.11 in (2017) |
| September 18 | 100.0°F (1931) | 33.1°F (1901) | 3.28 in (1905) |
| September 19 | 102.0°F (1954) | 36.0°F (1991) | 1.88 in (1975) |
| September 20 | 98.1°F (2022) | 34.0°F (1901) | 1.80 in (1993) |
| September 21 | 98.1°F (1956) | 34.0°F (1983) | 5.36 in (1957) |
| September 22 | 97.0°F (1937) | 32.0°F (1995) | 3.16 in (2009) |
| September 23 | 97.0°F (1939) | 32.0°F (1983) | 2.46 in (1986) |
| September 24 | 93.0°F (1984) | 30.0°F (1989) | 2.05 in (1921) |
| September 25 | 93.0°F (1904) | 35.1°F (1989) | 2.05 in (1973) |
| September 26 | 97.0°F (1953) | 30.9°F (1912) | 2.50 in (1917) |
| September 27 | 96.1°F (1956) | 30.0°F (1942) | 3.00 in (1986) |
| September 28 | 104.0°F (1953) | 27.0°F (1908) | 2.40 in (1934) |
| September 29 | 100.9°F (1953) | 27.0°F (1908) | 1.55 in (1954) |
| September 30 | 95.0°F (1938) | 28.0°F (1984) | 2.11 in (1986) |