August weather in Portage, WI
The average temperature in Portage in August is 69.6°F (59.4°F–79.9°F). Average precipitation: 4.12 inches.
August is a summer month in Portage, and is warmer than the annual average of 46.5°F. Daily temperatures swing about 20.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 13h 48m. For travel, August is a comfortable month to visit.
Avg High
79.9°F
Avg Low
59.4°F
Precipitation
4.12 in
Daylight
13h 48m
August records in Portage
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 96.1°F (1917) | 46.0°F (1976) | 3.22 in (1953) |
| August 2 | 102.9°F (1988) | 44.1°F (1965) | 2.48 in (1935) |
| August 3 | 100.9°F (1988) | 43.0°F (1966) | 1.50 in (2017) |
| August 4 | 99.0°F (1930) | 37.9°F (1971) | 3.80 in (1924) |
| August 5 | 99.0°F (1988) | 39.0°F (1971) | 1.96 in (1916) |
| August 6 | 100.0°F (1918) | 39.0°F (1971) | 2.00 in (1945) |
| August 7 | 93.9°F (1930) | 39.9°F (1976) | 6.29 in (1980) |
| August 8 | 97.0°F (1914) | 41.0°F (1976) | 3.28 in (1980) |
| August 9 | 97.0°F (1934) | 41.0°F (1972) | 2.60 in (1952) |
| August 10 | 96.1°F (1944) | 37.9°F (1982) | 1.63 in (1979) |
| August 11 | 97.0°F (1944) | 36.0°F (1967) | 1.59 in (1908) |
| August 12 | 98.1°F (1918) | 36.0°F (1967) | 1.53 in (2005) |
| August 13 | 97.0°F (1944) | 42.1°F (1982) | 2.35 in (1909) |
| August 14 | 95.0°F (1922) | 43.0°F (1964) | 2.50 in (2010) |
| August 15 | 97.0°F (1922) | 37.0°F (1979) | 3.20 in (1903) |
| August 16 | 102.0°F (1937) | 37.0°F (1976) | 1.25 in (1900) |
| August 17 | 100.9°F (1988) | 35.1°F (1981) | 3.15 in (1932) |
| August 18 | 100.9°F (1988) | 39.0°F (1977) | 2.55 in (1940) |
| August 19 | 98.1°F (1972) | 37.9°F (1981) | 3.90 in (1914) |
| August 20 | 98.1°F (1916) | 36.0°F (1967) | 2.40 in (1995) |
| August 21 | 98.1°F (1955) | 37.9°F (1970) | 2.56 in (1920) |
| August 22 | 97.0°F (1947) | 39.0°F (1967) | 1.20 in (2002) |
| August 23 | 96.1°F (1947) | 34.0°F (1967) | 1.90 in (1975) |
| August 24 | 100.9°F (2023) | 39.0°F (1977) | 1.65 in (2006) |
| August 25 | 93.9°F (1948) | 37.9°F (1977) | 1.03 in (2022) |
| August 26 | 95.0°F (1953) | 39.9°F (1934) | 2.28 in (1972) |
| August 27 | 95.0°F (1937) | 34.0°F (1968) | 1.93 in (1903) |
| August 28 | 97.0°F (1953) | 35.1°F (1982) | 7.50 in (2020) |
| August 29 | 96.1°F (1984) | 33.1°F (1965) | 2.41 in (2018) |
| August 30 | 95.0°F (1937) | 36.0°F (1915) | 1.00 in (1980) |
| August 31 | 98.1°F (1953) | 33.1°F (1967) | 2.35 in (1944) |