August weather in Duncan, OK
The average temperature in Duncan in August is 82.0°F (70.8°F–93.2°F). Average precipitation: 2.90 inches.
August is a summer month in Duncan, and is warmer than the annual average of 61.9°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 13h 18m. For travel, August is hot.
Avg High
93.2°F
Avg Low
70.8°F
Precipitation
2.90 in
Daylight
13h 18m
August records in Duncan
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 106.0°F (1970) | 61.0°F (2005) | 1.86 in (1950) |
| August 2 | 107.1°F (2011) | 55.9°F (1971) | 0.64 in (1966) |
| August 3 | 109.0°F (2011) | 62.1°F (1949) | 1.72 in (1995) |
| August 4 | 109.0°F (2011) | 62.1°F (1973) | 1.14 in (1990) |
| August 5 | 109.0°F (1964) | 60.1°F (1948) | 1.20 in (1976) |
| August 6 | 109.9°F (1946) | 61.0°F (1990) | 9.21 in (2019) |
| August 7 | 109.0°F (1946) | 60.1°F (1957) | 2.10 in (1945) |
| August 8 | 108.0°F (1970) | 55.9°F (1989) | 1.32 in (1942) |
| August 9 | 111.0°F (1970) | 55.9°F (1989) | 2.62 in (2022) |
| August 10 | 107.1°F (1937) | 59.0°F (1989) | 1.66 in (1974) |
| August 11 | 108.0°F (1937) | 60.1°F (1989) | 1.27 in (2017) |
| August 12 | 105.1°F (1948) | 55.9°F (1967) | 2.23 in (1953) |
| August 13 | 107.1°F (1937) | 55.9°F (1967) | 2.37 in (2018) |
| August 14 | 108.0°F (1956) | 60.1°F (1967) | 3.18 in (1997) |
| August 15 | 107.1°F (1956) | 60.1°F (1992) | 2.04 in (1985) |
| August 16 | 107.1°F (1952) | 59.0°F (1992) | 2.40 in (1942) |
| August 17 | 108.0°F (1956) | 62.1°F (1992) | 1.77 in (2017) |
| August 18 | 109.9°F (1946) | 63.0°F (1958) | 4.07 in (1953) |
| August 19 | 102.9°F (1969) | 59.0°F (1950) | 6.82 in (2007) |
| August 20 | 106.0°F (2011) | 55.9°F (1940) | 2.04 in (2016) |
| August 21 | 107.1°F (1948) | 57.9°F (1950) | 1.00 in (1983) |
| August 22 | 106.0°F (2011) | 57.9°F (1949) | 3.31 in (1966) |
| August 23 | 104.0°F (1948) | 57.9°F (1961) | 1.82 in (1950) |
| August 24 | 106.0°F (1963) | 55.0°F (1966) | 2.08 in (1958) |
| August 25 | 106.0°F (2011) | 55.0°F (1966) | 1.55 in (1946) |
| August 26 | 107.1°F (2011) | 55.0°F (1962) | 1.22 in (1944) |
| August 27 | 107.1°F (2011) | 61.0°F (1962) | 1.93 in (1996) |
| August 28 | 107.1°F (1963) | 55.0°F (1992) | 1.69 in (2004) |
| August 29 | 107.1°F (2011) | 57.0°F (1992) | 2.15 in (1966) |
| August 30 | 108.0°F (1956) | 55.9°F (1946) | 2.91 in (1944) |
| August 31 | 107.1°F (1939) | 57.9°F (1967) | 2.05 in (1976) |