August weather in Sun Prairie, WI
The average temperature in Sun Prairie in August is 69.7°F (59.5°F–79.9°F). Average precipitation: 4.16 inches.
August is a summer month in Sun Prairie, and is warmer than the annual average of 47°F. Daily temperatures swing about 20.4°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 46m. For travel, August is a comfortable month to visit.
Avg High
79.9°F
Avg Low
59.5°F
Precipitation
4.16 in
Daylight
13h 46m
August records in Sun Prairie
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.9°F (1988) | 46.9°F (1976) | 1.85 in (1942) |
| August 2 | 98.1°F (1988) | 44.1°F (1965) | 3.40 in (2001) |
| August 3 | 96.1°F (1958) | 43.0°F (1966) | 2.18 in (2004) |
| August 4 | 99.0°F (1947) | 41.0°F (1972) | 1.74 in (2014) |
| August 5 | 98.1°F (1947) | 45.0°F (1974) | 2.01 in (1977) |
| August 6 | 98.1°F (1947) | 43.0°F (1992) | 1.85 in (1942) |
| August 7 | 96.1°F (1949) | 42.1°F (1976) | 2.37 in (1980) |
| August 8 | 95.0°F (1941) | 44.1°F (1976) | 2.61 in (1965) |
| August 9 | 93.0°F (1949) | 39.9°F (1972) | 1.80 in (1960) |
| August 10 | 97.0°F (1944) | 44.1°F (1982) | 2.07 in (2025) |
| August 11 | 97.0°F (1941) | 39.0°F (1967) | 1.67 in (1990) |
| August 12 | 99.0°F (1995) | 37.9°F (1967) | 0.96 in (1974) |
| August 13 | 95.0°F (1944) | 43.0°F (1967) | 1.47 in (2010) |
| August 14 | 96.1°F (1944) | 37.0°F (1964) | 2.09 in (1981) |
| August 15 | 95.0°F (1955) | 37.0°F (1979) | 2.67 in (1993) |
| August 16 | 102.0°F (1988) | 37.9°F (1979) | 2.98 in (1995) |
| August 17 | 102.0°F (1988) | 45.0°F (1981) | 1.52 in (2018) |
| August 18 | 100.0°F (1955) | 41.0°F (1977) | 3.39 in (2007) |
| August 19 | 97.0°F (1983) | 43.0°F (1981) | 2.74 in (2016) |
| August 20 | 98.1°F (1955) | 39.0°F (1950) | 3.78 in (2018) |
| August 21 | 100.9°F (1955) | 43.0°F (1969) | 1.85 in (1966) |
| August 22 | 93.9°F (1976) | 44.1°F (1967) | 3.20 in (2007) |
| August 23 | 98.1°F (1947) | 43.0°F (1940) | 1.27 in (1999) |
| August 24 | 98.1°F (1947) | 41.0°F (1977) | 2.25 in (2006) |
| August 25 | 93.9°F (1948) | 37.0°F (1958) | 2.30 in (2001) |
| August 26 | 95.0°F (1953) | 39.0°F (1964) | 2.28 in (1986) |
| August 27 | 95.0°F (1953) | 35.1°F (1968) | 2.78 in (1959) |
| August 28 | 95.0°F (1955) | 37.9°F (1968) | 2.27 in (1989) |
| August 29 | 93.9°F (1948) | 35.1°F (1965) | 1.78 in (1957) |
| August 30 | 97.0°F (1953) | 39.9°F (1967) | 1.50 in (1956) |
| August 31 | 100.0°F (1953) | 37.0°F (1967) | 1.59 in (1989) |