August weather in South Portland, ME
The average temperature in South Portland in August is 69.2°F (59.7°F–78.7°F). Average precipitation: 3.57 inches.
August is a summer month in South Portland, and is warmer than the annual average of 47.5°F. Daily temperatures swing about 19°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 48m. For travel, August is one of the best months of the year to visit.
Avg High
78.7°F
Avg Low
59.7°F
Precipitation
3.57 in
Daylight
13h 48m
August records in South Portland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 98.1°F (1975) | 43.0°F (1953) | 1.00 in (2003) |
| August 2 | 102.9°F (1975) | 39.9°F (1953) | 4.14 in (1946) |
| August 3 | 91.0°F (1990) | 45.0°F (1976) | 2.81 in (2008) |
| August 4 | 93.0°F (1988) | 45.0°F (1959) | 1.50 in (1943) |
| August 5 | 97.0°F (1955) | 43.0°F (1972) | 1.87 in (1953) |
| August 6 | 93.9°F (2016) | 42.1°F (1957) | 2.29 in (2007) |
| August 7 | 96.1°F (2022) | 44.1°F (1953) | 0.92 in (1946) |
| August 8 | 95.0°F (1949) | 42.1°F (1950) | 1.13 in (2008) |
| August 9 | 95.0°F (2001) | 46.0°F (1964) | 2.58 in (1976) |
| August 10 | 91.9°F (1988) | 41.0°F (1955) | 3.24 in (1991) |
| August 11 | 99.0°F (1944) | 41.0°F (1963) | 1.32 in (1990) |
| August 12 | 99.0°F (1944) | 44.1°F (1950) | 0.96 in (2008) |
| August 13 | 99.0°F (1947) | 42.1°F (1941) | 6.43 in (2014) |
| August 14 | 96.1°F (1947) | 39.9°F (1964) | 0.89 in (2000) |
| August 15 | 98.1°F (1947) | 44.1°F (1950) | 1.47 in (2011) |
| August 16 | 95.0°F (1959) | 43.0°F (1964) | 1.63 in (2012) |
| August 17 | 97.0°F (1987) | 42.1°F (1961) | 0.81 in (2012) |
| August 18 | 93.9°F (1987) | 42.1°F (1957) | 1.91 in (2017) |
| August 19 | 90.0°F (1947) | 43.0°F (1958) | 7.75 in (1991) |
| August 20 | 91.0°F (1955) | 41.0°F (1964) | 0.94 in (2006) |
| August 21 | 95.0°F (1945) | 42.1°F (1953) | 1.91 in (2019) |
| August 22 | 91.0°F (1942) | 39.9°F (1982) | 2.19 in (2022) |
| August 23 | 93.9°F (1947) | 39.0°F (1957) | 2.97 in (2009) |
| August 24 | 93.0°F (1947) | 42.1°F (1962) | 1.30 in (1988) |
| August 25 | 93.0°F (1948) | 41.0°F (1987) | 2.64 in (2010) |
| August 26 | 100.0°F (1948) | 41.0°F (1942) | 1.52 in (2022) |
| August 27 | 100.0°F (1948) | 39.9°F (1942) | 0.69 in (1971) |
| August 28 | 98.1°F (1948) | 39.0°F (1957) | 1.42 in (2011) |
| August 29 | 96.1°F (1953) | 37.9°F (1941) | 2.05 in (1988) |
| August 30 | 95.0°F (1953) | 39.9°F (1965) | 1.59 in (1975) |
| August 31 | 93.9°F (2010) | 33.1°F (1965) | 2.26 in (1954) |