September weather in Armour, SD
The average temperature in Armour in September is 65.3°F (51.5°F–79.2°F). Average precipitation: 2.42 inches.
September is a fall month in Armour, and is warmer than the annual average of 48.9°F. Daily temperatures swing about 27.7°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
79.2°F
Avg Low
51.5°F
Precipitation
2.42 in
Daylight
12h 17m
September records in Armour
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (1913) | 37.0°F (1974) | 1.87 in (1959) |
| September 2 | 102.0°F (1929) | 41.0°F (1914) | 0.96 in (1934) |
| September 3 | 100.9°F (1925) | 30.9°F (1974) | 1.58 in (1973) |
| September 4 | 102.9°F (1931) | 33.1°F (1905) | 1.53 in (1999) |
| September 5 | 104.0°F (1933) | 37.0°F (1929) | 1.93 in (1995) |
| September 6 | 109.0°F (1939) | 32.0°F (1956) | 1.46 in (1901) |
| September 7 | 107.1°F (1940) | 35.1°F (1898) | 1.75 in (1946) |
| September 8 | 104.0°F (1940) | 37.0°F (1907) | 1.32 in (1960) |
| September 9 | 109.0°F (1904) | 33.1°F (1910) | 1.82 in (1946) |
| September 10 | 102.0°F (1931) | 33.1°F (1929) | 1.64 in (1947) |
| September 11 | 102.0°F (1908) | 26.1°F (1902) | 1.60 in (1932) |
| September 12 | 104.0°F (1908) | 30.0°F (1902) | 1.50 in (1979) |
| September 13 | 102.9°F (1939) | 21.9°F (2003) | 1.67 in (2002) |
| September 14 | 102.0°F (1939) | 32.0°F (1903) | 1.50 in (1986) |
| September 15 | 102.9°F (1955) | 28.0°F (1916) | 1.45 in (2004) |
| September 16 | 100.0°F (1910) | 30.0°F (1903) | 2.20 in (1907) |
| September 17 | 100.0°F (1940) | 24.1°F (1902) | 1.14 in (1967) |
| September 18 | 102.0°F (1940) | 25.0°F (1918) | 2.78 in (1986) |
| September 19 | 102.0°F (1939) | 24.1°F (1991) | 2.76 in (1996) |
| September 20 | 96.1°F (2005) | 21.0°F (1918) | 4.44 in (1950) |
| September 21 | 100.0°F (1936) | 27.0°F (1934) | 1.36 in (2006) |
| September 22 | 99.0°F (1936) | 26.1°F (1995) | 1.40 in (1968) |
| September 23 | 104.0°F (1938) | 23.0°F (1983) | 0.37 in (1960) |
| September 24 | 93.0°F (1990) | 23.0°F (1942) | 2.43 in (1934) |
| September 25 | 96.1°F (1903) | 19.9°F (1926) | 2.58 in (2005) |
| September 26 | 97.0°F (1990) | 23.0°F (1984) | 0.73 in (1976) |
| September 27 | 100.9°F (1956) | 24.1°F (1912) | 0.40 in (1904) |
| September 28 | 95.0°F (1905) | 21.0°F (1951) | 1.10 in (1973) |
| September 29 | 93.0°F (1905) | 17.1°F (1899) | 1.94 in (1962) |
| September 30 | 93.0°F (1952) | 21.9°F (1920) | 1.50 in (2007) |