August weather in Dexter, IA
The average temperature in Dexter in August is 70.9°F (59.4°F–82.3°F). Average precipitation: 3.62 inches.
August is a summer month in Dexter, and is warmer than the annual average of 48.1°F. Daily temperatures swing about 22.9°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
82.3°F
Avg Low
59.4°F
Precipitation
3.62 in
Daylight
13h 40m
August records in Dexter
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.0°F (1957) | 41.0°F (1898) | 2.28 in (1981) |
| August 2 | 100.9°F (1930) | 50.0°F (1920) | 1.45 in (1931) |
| August 3 | 106.0°F (1930) | 46.0°F (1927) | 2.14 in (2010) |
| August 4 | 111.0°F (1918) | 41.0°F (1978) | 2.13 in (2004) |
| August 5 | 109.9°F (1934) | 42.1°F (1957) | 2.96 in (1982) |
| August 6 | 102.9°F (1934) | 48.9°F (1957) | 2.35 in (1963) |
| August 7 | 102.9°F (1934) | 45.0°F (1976) | 3.54 in (2025) |
| August 8 | 111.9°F (1934) | 46.0°F (1904) | 3.48 in (1970) |
| August 9 | 111.0°F (1934) | 44.1°F (1927) | 1.35 in (1904) |
| August 10 | 102.9°F (1911) | 43.0°F (1917) | 2.52 in (1939) |
| August 11 | 100.0°F (1894) | 43.0°F (1967) | 2.00 in (1980) |
| August 12 | 105.1°F (1936) | 44.1°F (2004) | 3.27 in (1976) |
| August 13 | 100.0°F (1918) | 39.9°F (1964) | 1.67 in (2007) |
| August 14 | 106.0°F (1936) | 45.0°F (1962) | 2.90 in (1896) |
| August 15 | 105.1°F (1988) | 44.1°F (1994) | 4.08 in (1908) |
| August 16 | 106.0°F (1983) | 48.9°F (2004) | 2.86 in (1980) |
| August 17 | 105.1°F (1936) | 43.0°F (2012) | 2.67 in (1941) |
| August 18 | 108.0°F (1936) | 41.0°F (2012) | 3.90 in (1913) |
| August 19 | 104.0°F (1936) | 41.0°F (2012) | 2.63 in (1993) |
| August 20 | 99.0°F (1916) | 39.9°F (1950) | 2.05 in (1969) |
| August 21 | 100.0°F (1936) | 46.0°F (1950) | 3.72 in (1946) |
| August 22 | 100.0°F (1936) | 42.1°F (1923) | 2.14 in (1954) |
| August 23 | 99.0°F (1894) | 45.0°F (1966) | 2.63 in (1895) |
| August 24 | 104.0°F (1936) | 42.1°F (1934) | 5.47 in (1946) |
| August 25 | 105.1°F (1936) | 39.9°F (1958) | 3.40 in (1947) |
| August 26 | 104.0°F (1983) | 43.0°F (2025) | 4.05 in (1944) |
| August 27 | 102.0°F (1955) | 43.0°F (1971) | 1.64 in (2009) |
| August 28 | 98.1°F (1955) | 37.9°F (1986) | 4.70 in (1977) |
| August 29 | 99.0°F (1894) | 39.0°F (1946) | 2.31 in (1993) |
| August 30 | 100.0°F (1947) | 37.0°F (1915) | 2.54 in (2024) |
| August 31 | 100.0°F (2013) | 39.0°F (1967) | 2.46 in (1977) |