August weather in Harpers Ferry, IA
The average temperature in Harpers Ferry in August is 70.7°F (61.3°F–80.1°F). Average precipitation: 3.82 inches.
August is a summer month in Harpers Ferry, and is warmer than the annual average of 47.4°F. Daily temperatures swing about 18.8°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 47m. For travel, August is a comfortable month to visit.
Avg High
80.1°F
Avg Low
61.3°F
Precipitation
3.82 in
Daylight
13h 47m
August records in Harpers Ferry
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.0°F (1988) | 53.1°F (1977) | 1.56 in (1950) |
| August 2 | 98.1°F (1964) | 52.0°F (1965) | 2.00 in (1953) |
| August 3 | 98.1°F (1988) | 51.1°F (1950) | 2.16 in (1959) |
| August 4 | 100.0°F (1947) | 50.0°F (1978) | 1.75 in (1982) |
| August 5 | 98.1°F (1947) | 50.0°F (1957) | 2.21 in (2007) |
| August 6 | 97.0°F (1984) | 51.1°F (1957) | 6.42 in (1951) |
| August 7 | 96.1°F (1949) | 51.1°F (1990) | 1.20 in (1972) |
| August 8 | 96.1°F (1941) | 52.0°F (1976) | 2.15 in (1991) |
| August 9 | 95.0°F (1985) | 48.0°F (1972) | 1.96 in (1973) |
| August 10 | 95.0°F (1944) | 48.9°F (1982) | 2.40 in (2025) |
| August 11 | 96.1°F (1941) | 51.1°F (1967) | 1.05 in (1994) |
| August 12 | 95.0°F (1947) | 50.0°F (1967) | 1.47 in (2005) |
| August 13 | 93.0°F (1947) | 48.9°F (1964) | 2.10 in (1943) |
| August 14 | 93.9°F (1988) | 45.0°F (1964) | 1.62 in (1987) |
| August 15 | 97.0°F (1988) | 46.9°F (1964) | 1.42 in (1993) |
| August 16 | 99.0°F (1988) | 48.0°F (1976) | 1.07 in (1952) |
| August 17 | 100.9°F (1988) | 50.0°F (1962) | 2.85 in (2025) |
| August 18 | 97.0°F (1947) | 46.9°F (1977) | 1.45 in (1998) |
| August 19 | 98.1°F (1983) | 48.9°F (1963) | 2.60 in (2007) |
| August 20 | 96.1°F (2003) | 44.1°F (1950) | 0.98 in (2007) |
| August 21 | 98.1°F (1947) | 48.9°F (1950) | 2.55 in (1980) |
| August 22 | 96.1°F (1947) | 48.9°F (1967) | 1.72 in (1959) |
| August 23 | 98.1°F (1948) | 48.0°F (1952) | 1.58 in (1943) |
| August 24 | 99.0°F (2023) | 50.0°F (1942) | 4.74 in (2016) |
| August 25 | 96.1°F (2023) | 44.1°F (1958) | 5.00 in (1983) |
| August 26 | 93.0°F (1955) | 46.0°F (1964) | 1.33 in (1972) |
| August 27 | 96.1°F (2024) | 46.9°F (1968) | 1.28 in (2004) |
| August 28 | 96.1°F (1955) | 44.1°F (1986) | 2.92 in (2021) |
| August 29 | 93.0°F (1984) | 45.0°F (1965) | 1.70 in (1995) |
| August 30 | 93.9°F (1941) | 48.0°F (1974) | 1.60 in (2024) |
| August 31 | 93.9°F (1953) | 44.1°F (1967) | 1.98 in (1944) |