July weather in Interior, SD
The average temperature in Interior in July is 76.8°F (62.3°F–91.2°F). Average precipitation: 2.23 inches.
July is a summer month in Interior, and is warmer than the annual average of 50.4°F. Daily temperatures swing about 28.9°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 14h 57m. For travel, July is hot.
Avg High
91.2°F
Avg Low
62.3°F
Precipitation
2.23 in
Daylight
14h 57m
July records in Interior
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 104.0°F (1990) | 43.0°F (1959) | 0.87 in (2019) |
| July 2 | 105.1°F (1990) | 45.0°F (1968) | 0.98 in (1981) |
| July 3 | 107.1°F (1990) | 46.0°F (1972) | 1.91 in (2019) |
| July 4 | 108.0°F (1966) | 46.0°F (1972) | 1.45 in (2019) |
| July 5 | 104.0°F (1989) | 46.9°F (2020) | 1.43 in (2019) |
| July 6 | 111.0°F (1973) | 52.0°F (1993) | 0.80 in (1975) |
| July 7 | 109.0°F (1973) | 51.1°F (1993) | 1.07 in (1994) |
| July 8 | 109.0°F (1989) | 48.0°F (1994) | 0.68 in (1998) |
| July 9 | 108.0°F (1989) | 48.9°F (1956) | 0.58 in (1973) |
| July 10 | 108.0°F (1966) | 48.0°F (1999) | 0.97 in (1958) |
| July 11 | 107.1°F (1974) | 48.9°F (1975) | 0.98 in (1991) |
| July 12 | 105.1°F (1966) | 50.0°F (1987) | 0.98 in (1956) |
| July 13 | 106.0°F (1974) | 48.9°F (1987) | 0.64 in (1981) |
| July 14 | 107.1°F (2000) | 50.0°F (1993) | 1.35 in (1993) |
| July 15 | 114.1°F (2006) | 48.9°F (2014) | 0.51 in (2025) |
| July 16 | 114.1°F (2006) | 51.1°F (1972) | 0.72 in (1959) |
| July 17 | 109.9°F (2006) | 51.1°F (1972) | 2.44 in (1999) |
| July 18 | 111.0°F (2022) | 50.0°F (2009) | 0.50 in (1987) |
| July 19 | 109.9°F (2022) | 53.1°F (1956) | 2.57 in (2008) |
| July 20 | 107.1°F (1983) | 51.1°F (1988) | 1.48 in (1997) |
| July 21 | 108.0°F (1960) | 52.0°F (1980) | 1.61 in (1990) |
| July 22 | 109.0°F (1964) | 51.1°F (1978) | 1.22 in (1978) |
| July 23 | 105.1°F (1960) | 50.0°F (1990) | 1.12 in (1998) |
| July 24 | 108.0°F (2003) | 52.0°F (1988) | 0.92 in (1968) |
| July 25 | 108.0°F (1963) | 54.0°F (1996) | 1.20 in (2001) |
| July 26 | 108.0°F (2007) | 46.9°F (1971) | 2.28 in (1982) |
| July 27 | 108.0°F (2021) | 48.0°F (1994) | 1.77 in (2001) |
| July 28 | 109.0°F (2006) | 45.0°F (1971) | 0.86 in (2011) |
| July 29 | 109.9°F (1980) | 45.0°F (1971) | 1.02 in (1979) |
| July 30 | 109.0°F (1980) | 42.1°F (1971) | 1.32 in (1958) |
| July 31 | 107.1°F (2006) | 48.0°F (1971) | 1.09 in (2023) |