August weather in Sunnyside, WA
The average temperature in Sunnyside in August is 69.4°F (52.2°F–86.5°F). Average precipitation: 0.26 inches.
August is a summer month in Sunnyside, and is warmer than the annual average of 49.9°F. Daily temperatures swing about 34.3°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 13h 59m. For travel, August is a comfortable month to visit.
Avg High
86.5°F
Avg Low
52.2°F
Precipitation
0.26 in
Daylight
13h 59m
August records in Sunnyside
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 106.0°F (1971) | 44.1°F (1902) | 0.22 in (1998) |
| August 2 | 105.1°F (1965) | 43.0°F (1909) | 0.71 in (1934) |
| August 3 | 102.9°F (2009) | 44.1°F (1903) | 0.14 in (1962) |
| August 4 | 102.9°F (1961) | 44.1°F (1924) | 0.16 in (2001) |
| August 5 | 104.0°F (1998) | 39.0°F (1909) | 0.38 in (1943) |
| August 6 | 104.0°F (1990) | 39.0°F (1909) | 0.05 in (1991) |
| August 7 | 102.9°F (1898) | 42.1°F (1909) | 0.28 in (2003) |
| August 8 | 104.0°F (1898) | 42.1°F (1895) | 0.17 in (1953) |
| August 9 | 102.9°F (1898) | 46.0°F (1919) | 0.08 in (1899) |
| August 10 | 108.0°F (1898) | 45.0°F (1909) | 0.12 in (1952) |
| August 11 | 104.0°F (1971) | 43.0°F (1899) | 0.20 in (1922) |
| August 12 | 104.0°F (1971) | 41.0°F (1927) | 0.18 in (1962) |
| August 13 | 102.9°F (1933) | 42.1°F (1955) | 0.08 in (1908) |
| August 14 | 104.0°F (1920) | 39.9°F (1937) | 0.16 in (1979) |
| August 15 | 104.0°F (1920) | 39.0°F (1910) | 0.18 in (1978) |
| August 16 | 104.0°F (1923) | 39.0°F (1910) | 0.54 in (1961) |
| August 17 | 106.0°F (1967) | 39.9°F (1895) | 0.21 in (1924) |
| August 18 | 106.0°F (2008) | 39.0°F (1916) | 0.72 in (1975) |
| August 19 | 105.1°F (1967) | 37.9°F (1910) | 0.14 in (2007) |
| August 20 | 105.1°F (1897) | 39.0°F (1916) | 0.88 in (1923) |
| August 21 | 105.1°F (1897) | 39.0°F (1910) | 0.69 in (1990) |
| August 22 | 100.9°F (1897) | 37.0°F (1960) | 0.66 in (2004) |
| August 23 | 102.9°F (1915) | 39.9°F (1910) | 0.22 in (1975) |
| August 24 | 102.0°F (1915) | 37.9°F (1925) | 0.52 in (1977) |
| August 25 | 102.0°F (1915) | 36.0°F (1910) | 0.31 in (1976) |
| August 26 | 100.9°F (1916) | 36.0°F (1908) | 0.57 in (1941) |
| August 27 | 100.9°F (1916) | 37.0°F (1910) | 0.28 in (1968) |
| August 28 | 102.0°F (1916) | 37.9°F (1909) | 0.12 in (1983) |
| August 29 | 102.9°F (1915) | 36.0°F (1925) | 0.48 in (1920) |
| August 30 | 100.0°F (1967) | 36.0°F (1908) | 0.88 in (1977) |
| August 31 | 102.0°F (1967) | 37.0°F (1908) | 0.63 in (1896) |