August weather in Mellette, SD
The average temperature in Mellette in August is 68.5°F (55.2°F–81.8°F). Average precipitation: 2.54 inches.
August is a summer month in Mellette, and is warmer than the annual average of 42.8°F. Daily temperatures swing about 26.6°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 13h 54m. For travel, August is a comfortable month to visit.
Avg High
81.8°F
Avg Low
55.2°F
Precipitation
2.54 in
Daylight
13h 54m
August records in Mellette
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 107.1°F (1987) | 42.1°F (1927) | 1.30 in (1897) |
| August 2 | 107.1°F (1938) | 37.9°F (1971) | 2.12 in (1984) |
| August 3 | 109.0°F (1947) | 37.9°F (1907) | 2.26 in (1998) |
| August 4 | 107.1°F (1934) | 37.9°F (1978) | 1.56 in (1907) |
| August 5 | 106.0°F (1941) | 42.1°F (1974) | 2.03 in (1906) |
| August 6 | 107.1°F (1941) | 42.1°F (1902) | 1.50 in (1962) |
| August 7 | 106.0°F (1980) | 39.9°F (1904) | 1.14 in (1942) |
| August 8 | 106.0°F (1947) | 41.0°F (1912) | 1.04 in (1958) |
| August 9 | 108.0°F (1947) | 36.0°F (1985) | 1.25 in (1893) |
| August 10 | 109.0°F (1947) | 39.0°F (1903) | 1.85 in (1994) |
| August 11 | 104.0°F (1965) | 33.1°F (1902) | 2.10 in (2016) |
| August 12 | 106.0°F (1965) | 39.0°F (1964) | 1.41 in (1916) |
| August 13 | 114.1°F (1965) | 36.0°F (1964) | 2.75 in (1950) |
| August 14 | 105.1°F (1935) | 39.0°F (1968) | 1.47 in (1908) |
| August 15 | 109.9°F (1937) | 37.9°F (1897) | 0.76 in (1951) |
| August 16 | 108.0°F (1988) | 44.1°F (1898) | 2.00 in (1978) |
| August 17 | 106.0°F (1988) | 39.0°F (1943) | 1.73 in (1899) |
| August 18 | 108.0°F (1959) | 39.9°F (2002) | 2.28 in (2007) |
| August 19 | 106.0°F (1976) | 35.1°F (2004) | 3.41 in (1989) |
| August 20 | 107.1°F (1976) | 32.0°F (1907) | 4.59 in (1984) |
| August 21 | 106.0°F (1976) | 39.0°F (1920) | 1.83 in (1916) |
| August 22 | 104.0°F (1971) | 35.1°F (1908) | 1.44 in (1985) |
| August 23 | 105.1°F (1925) | 39.0°F (1942) | 0.85 in (1905) |
| August 24 | 109.0°F (2003) | 33.1°F (1934) | 1.88 in (1900) |
| August 25 | 102.0°F (1926) | 36.0°F (1934) | 1.66 in (1960) |
| August 26 | 100.0°F (1991) | 33.1°F (1914) | 0.52 in (1943) |
| August 27 | 106.0°F (1976) | 39.0°F (1906) | 2.58 in (1985) |
| August 28 | 102.9°F (1959) | 35.1°F (1935) | 3.20 in (1979) |
| August 29 | 102.0°F (1983) | 36.0°F (1946) | 1.55 in (1993) |
| August 30 | 98.1°F (1961) | 37.0°F (1935) | 1.80 in (1971) |
| August 31 | 100.9°F (1898) | 33.1°F (1987) | 0.72 in (1989) |