August weather in Unalaska, AK
The average temperature in Unalaska in August is 53.7°F (48.1°F–59.3°F). Average precipitation: 2.86 inches.
August is a summer month in Unalaska, and is warmer than the annual average of 41.6°F. Daily temperatures swing about 11.2°F between overnight low and afternoon high. Expect about 15 days with precipitation. Daylight averages about 14h 37m. For travel, August is a comfortable month to visit.
Avg High
59.3°F
Avg Low
48.1°F
Precipitation
2.86 in
Daylight
14h 37m
August records in Unalaska
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 75.0°F (1984) | 39.9°F (1952) | 0.65 in (1919) |
| August 2 | 77.0°F (2019) | 39.9°F (1928) | 0.65 in (1918) |
| August 3 | 75.9°F (1935) | 36.0°F (1939) | 6.80 in (2002) |
| August 4 | 77.0°F (1944) | 25.0°F (1986) | 0.54 in (1921) |
| August 5 | 77.0°F (2018) | 36.0°F (2011) | 0.63 in (1997) |
| August 6 | 80.1°F (1929) | 39.0°F (1985) | 1.00 in (1923) |
| August 7 | 72.0°F (1932) | 35.1°F (1986) | 1.12 in (1991) |
| August 8 | 72.0°F (1932) | 41.0°F (1922) | 1.60 in (1919) |
| August 9 | 72.0°F (1932) | 34.0°F (1922) | 0.91 in (2018) |
| August 10 | 73.0°F (1931) | 39.9°F (1940) | 0.73 in (1985) |
| August 11 | 73.9°F (2007) | 39.9°F (1928) | 1.53 in (2012) |
| August 12 | 81.0°F (2007) | 39.9°F (1986) | 0.84 in (2012) |
| August 13 | 79.0°F (2001) | 37.9°F (1922) | 0.60 in (1985) |
| August 14 | 73.9°F (1944) | 37.9°F (1992) | 2.05 in (2010) |
| August 15 | 75.9°F (1937) | 30.0°F (2004) | 2.07 in (1929) |
| August 16 | 79.0°F (1937) | 32.0°F (1985) | 2.40 in (1990) |
| August 17 | 77.0°F (1937) | 35.1°F (1985) | 0.78 in (1985) |
| August 18 | 71.1°F (2011) | 37.0°F (1939) | 1.34 in (2018) |
| August 19 | 109.9°F (1985) | 37.0°F (1927) | 1.40 in (1992) |
| August 20 | 73.9°F (1997) | 30.9°F (1991) | 0.65 in (1982) |
| August 21 | 73.0°F (1937) | 33.1°F (1991) | 2.22 in (2004) |
| August 22 | 73.0°F (1937) | 39.0°F (1916) | 0.98 in (1933) |
| August 23 | 77.0°F (1953) | 34.0°F (1917) | 0.88 in (1997) |
| August 24 | 77.0°F (1953) | 36.0°F (1985) | 0.52 in (1929) |
| August 25 | 73.0°F (1990) | 36.0°F (1985) | 0.63 in (1941) |
| August 26 | 75.0°F (2013) | 39.9°F (1915) | 1.04 in (1941) |
| August 27 | 73.9°F (1937) | 39.9°F (1926) | 1.67 in (1946) |
| August 28 | 82.0°F (1982) | 33.1°F (1991) | 1.65 in (1926) |
| August 29 | 75.9°F (1929) | 32.0°F (1991) | 1.03 in (1931) |
| August 30 | 68.0°F (1929) | 34.0°F (1928) | 0.67 in (2020) |
| August 31 | 66.9°F (1937) | 34.0°F (1928) | 1.48 in (2019) |