August weather in Derby, IA
The average temperature in Derby in August is 71.1°F (59.0°F–83.1°F). Average precipitation: 4.40 inches.
August is a summer month in Derby, and is warmer than the annual average of 48.3°F. Daily temperatures swing about 24.1°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 13h 38m. For travel, August is a comfortable month to visit.
Avg High
83.1°F
Avg Low
59.0°F
Precipitation
4.40 in
Daylight
13h 38m
August records in Derby
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.0°F (1938) | 42.1°F (1971) | 1.29 in (1896) |
| August 2 | 104.0°F (1938) | 48.0°F (1907) | 1.30 in (1955) |
| August 3 | 109.0°F (1930) | 48.0°F (1912) | 2.17 in (2006) |
| August 4 | 109.9°F (1918) | 44.1°F (1912) | 2.25 in (2004) |
| August 5 | 109.0°F (1934) | 44.1°F (1948) | 2.40 in (1982) |
| August 6 | 108.0°F (1934) | 46.0°F (2017) | 1.72 in (1972) |
| August 7 | 108.0°F (1934) | 42.1°F (1989) | 2.40 in (1999) |
| August 8 | 111.9°F (1934) | 45.0°F (1904) | 5.81 in (1970) |
| August 9 | 114.1°F (1934) | 46.0°F (1927) | 1.80 in (1943) |
| August 10 | 104.0°F (1934) | 45.0°F (1917) | 1.38 in (1993) |
| August 11 | 100.0°F (1941) | 46.0°F (1902) | 2.70 in (1939) |
| August 12 | 107.1°F (1936) | 44.1°F (1964) | 2.27 in (1932) |
| August 13 | 104.0°F (1936) | 39.0°F (1964) | 2.29 in (1987) |
| August 14 | 109.9°F (1936) | 46.0°F (1963) | 2.60 in (1986) |
| August 15 | 106.0°F (1936) | 43.0°F (1994) | 2.75 in (1902) |
| August 16 | 105.1°F (1936) | 43.0°F (2004) | 3.10 in (1938) |
| August 17 | 108.0°F (1936) | 45.0°F (2013) | 2.20 in (1941) |
| August 18 | 109.0°F (1936) | 44.1°F (1963) | 3.05 in (1906) |
| August 19 | 100.9°F (1983) | 46.9°F (2020) | 3.10 in (1993) |
| August 20 | 100.0°F (1947) | 35.1°F (1950) | 1.97 in (1951) |
| August 21 | 104.0°F (1936) | 44.1°F (1950) | 1.50 in (2007) |
| August 22 | 102.9°F (1936) | 43.0°F (1923) | 1.95 in (2017) |
| August 23 | 100.9°F (1948) | 42.1°F (1966) | 2.85 in (2014) |
| August 24 | 109.0°F (1936) | 39.9°F (1934) | 3.57 in (2007) |
| August 25 | 107.1°F (1936) | 39.9°F (1958) | 1.62 in (1975) |
| August 26 | 102.0°F (2003) | 39.9°F (1910) | 4.52 in (1987) |
| August 27 | 100.9°F (1983) | 41.0°F (2025) | 11.23 in (1903) |
| August 28 | 99.0°F (1984) | 37.9°F (1986) | 1.45 in (1914) |
| August 29 | 102.0°F (1984) | 42.1°F (1946) | 1.92 in (2018) |
| August 30 | 104.0°F (1947) | 37.0°F (1915) | 1.75 in (1922) |
| August 31 | 104.0°F (1913) | 41.0°F (1915) | 3.32 in (1980) |