September weather in Hermosa, SD
The average temperature in Hermosa in September is °F (°F–°F). Average precipitation: 1.36 inches.
September is a fall month in Hermosa, and is cooler than the annual average of 0°F. Expect about 6 days with precipitation. Daylight averages about 12h 17m.
Avg High
°F
Avg Low
°F
Precipitation
1.36 in
Daylight
12h 17m
September records in Hermosa
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (1929) | 37.0°F (1914) | 0.73 in (1963) |
| September 2 | 98.1°F (1925) | 37.0°F (1917) | 0.90 in (1974) |
| September 3 | 98.1°F (1924) | 26.1°F (1928) | 0.67 in (1968) |
| September 4 | 98.1°F (1913) | 39.0°F (1928) | 0.45 in (2004) |
| September 5 | 99.0°F (1913) | 39.9°F (1920) | 0.84 in (1997) |
| September 6 | 99.0°F (1913) | 32.0°F (1929) | 1.18 in (1911) |
| September 7 | 104.0°F (1908) | 34.0°F (1929) | 0.74 in (1970) |
| September 8 | 98.1°F (1916) | 36.0°F (1929) | 0.85 in (1985) |
| September 9 | 96.1°F (1906) | 33.1°F (1929) | 0.92 in (2002) |
| September 10 | 89.1°F (1909) | 21.9°F (1928) | 1.26 in (2003) |
| September 11 | 99.0°F (1908) | 30.0°F (1921) | 0.81 in (1991) |
| September 12 | 98.1°F (1919) | 30.9°F (1924) | 0.50 in (1961) |
| September 13 | 95.0°F (1913) | 28.0°F (1916) | 0.90 in (1966) |
| September 14 | 90.0°F (1908) | 27.0°F (1916) | 0.77 in (1970) |
| September 15 | 91.9°F (1929) | 34.0°F (1918) | 2.83 in (1913) |
| September 16 | 98.1°F (1910) | 36.0°F (1912) | 0.73 in (1959) |
| September 17 | 93.0°F (1920) | 27.0°F (1911) | 0.64 in (1959) |
| September 18 | 96.1°F (1914) | 30.0°F (1911) | 1.06 in (1946) |
| September 19 | 100.0°F (1914) | 28.0°F (1918) | 0.70 in (1986) |
| September 20 | 93.9°F (1922) | 24.1°F (1927) | 1.62 in (1955) |
| September 21 | 97.0°F (1922) | 30.0°F (1924) | 1.14 in (1998) |
| September 22 | 96.1°F (1922) | 30.0°F (1924) | 0.39 in (1963) |
| September 23 | 90.0°F (1908) | 28.9°F (1913) | 1.14 in (1989) |
| September 24 | 89.1°F (1906) | 21.9°F (1912) | 0.73 in (2006) |
| September 25 | 88.0°F (1909) | 12.9°F (1926) | 0.90 in (1959) |
| September 26 | 95.0°F (1914) | 21.0°F (1926) | 0.43 in (1927) |
| September 27 | 93.9°F (1914) | 24.1°F (1927) | 0.13 in (1912) |
| September 28 | 90.0°F (1909) | 24.1°F (1912) | 2.99 in (1923) |
| September 29 | 89.1°F (1909) | 24.1°F (1920) | 0.68 in (1965) |
| September 30 | 90.0°F (1906) | 27.0°F (1920) | 0.90 in (1918) |