August weather in Knoxville, IA
The average temperature in Knoxville in August is 72.9°F (63.1°F–82.7°F). Average precipitation: 3.89 inches.
August is a summer month in Knoxville, and is warmer than the annual average of 49.9°F. Daily temperatures swing about 19.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 40m. For travel, August is a comfortable month to visit.
Avg High
82.7°F
Avg Low
63.1°F
Precipitation
3.89 in
Daylight
13h 40m
August records in Knoxville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.0°F (1938) | 50.0°F (1936) | 2.21 in (1896) |
| August 2 | 102.0°F (1947) | 48.9°F (1920) | 2.04 in (2004) |
| August 3 | 108.0°F (1930) | 45.0°F (1927) | 1.92 in (2004) |
| August 4 | 113.0°F (1918) | 46.0°F (1912) | 2.91 in (1970) |
| August 5 | 108.0°F (1918) | 48.9°F (1957) | 1.70 in (1936) |
| August 6 | 106.0°F (1934) | 50.0°F (1917) | 2.58 in (1963) |
| August 7 | 102.9°F (1918) | 46.0°F (1989) | 1.23 in (2013) |
| August 8 | 114.1°F (1934) | 45.0°F (1904) | 2.50 in (1952) |
| August 9 | 111.9°F (1934) | 43.0°F (1927) | 2.77 in (2007) |
| August 10 | 102.0°F (1911) | 46.9°F (1917) | 1.75 in (1995) |
| August 11 | 100.9°F (1941) | 48.9°F (1902) | 2.01 in (2010) |
| August 12 | 104.0°F (1918) | 41.0°F (1964) | 2.50 in (1943) |
| August 13 | 102.9°F (1918) | 45.0°F (1964) | 2.00 in (1940) |
| August 14 | 104.0°F (1934) | 50.0°F (2004) | 1.70 in (1905) |
| August 15 | 100.9°F (1988) | 48.0°F (1929) | 3.83 in (1908) |
| August 16 | 105.1°F (1983) | 48.0°F (1992) | 3.36 in (1900) |
| August 17 | 104.0°F (1983) | 48.9°F (1897) | 2.30 in (1954) |
| August 18 | 109.0°F (1936) | 46.9°F (1977) | 1.55 in (1970) |
| August 19 | 102.9°F (1983) | 48.0°F (1956) | 2.33 in (1996) |
| August 20 | 102.9°F (1947) | 41.0°F (1950) | 1.22 in (1958) |
| August 21 | 102.0°F (1936) | 42.1°F (1950) | 0.98 in (1977) |
| August 22 | 102.9°F (1947) | 43.0°F (1923) | 2.25 in (1988) |
| August 23 | 104.0°F (1947) | 44.1°F (1966) | 2.50 in (1922) |
| August 24 | 105.1°F (1936) | 42.1°F (1934) | 2.14 in (2007) |
| August 25 | 107.1°F (1936) | 39.9°F (1934) | 2.75 in (1932) |
| August 26 | 105.1°F (1983) | 44.1°F (1910) | 3.55 in (1954) |
| August 27 | 99.0°F (1955) | 45.0°F (1906) | 3.42 in (2009) |
| August 28 | 100.0°F (1984) | 42.1°F (1916) | 2.00 in (2004) |
| August 29 | 104.0°F (1984) | 44.1°F (1893) | 2.66 in (1975) |
| August 30 | 100.0°F (1984) | 39.9°F (1915) | 2.40 in (1983) |
| August 31 | 102.0°F (2013) | 43.0°F (1915) | 1.97 in (1982) |