August weather in Rainier, OR
The average temperature in Rainier in August is 66.9°F (53.3°F–80.4°F). Average precipitation: 0.97 inches.
August is a summer month in Rainier, and is warmer than the annual average of 53.2°F. Daily temperatures swing about 27.1°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 13h 58m. For travel, August is a comfortable month to visit.
Avg High
80.4°F
Avg Low
53.3°F
Precipitation
0.97 in
Daylight
13h 58m
August records in Rainier
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 99.0°F (1965) | 39.9°F (1941) | 0.92 in (1985) |
| August 2 | 98.1°F (2017) | 39.0°F (1930) | 0.48 in (1934) |
| August 3 | 100.9°F (2017) | 39.9°F (1930) | 1.95 in (1956) |
| August 4 | 100.0°F (2017) | 41.0°F (1931) | 1.20 in (1933) |
| August 5 | 97.0°F (1993) | 39.0°F (1929) | 0.35 in (1933) |
| August 6 | 93.0°F (2008) | 41.0°F (1939) | 0.21 in (1943) |
| August 7 | 97.0°F (2022) | 41.0°F (1975) | 1.02 in (1976) |
| August 8 | 99.0°F (1972) | 39.9°F (1935) | 0.71 in (1962) |
| August 9 | 102.9°F (1960) | 43.0°F (1939) | 0.75 in (1932) |
| August 10 | 108.0°F (1981) | 42.1°F (1938) | 0.19 in (1957) |
| August 11 | 106.0°F (1981) | 41.0°F (1931) | 0.68 in (1957) |
| August 12 | 100.0°F (1935) | 37.9°F (1928) | 0.65 in (1965) |
| August 13 | 102.0°F (1977) | 37.9°F (1931) | 0.69 in (1978) |
| August 14 | 100.9°F (2002) | 39.9°F (1937) | 1.14 in (1948) |
| August 15 | 100.0°F (2010) | 37.0°F (1937) | 0.40 in (1978) |
| August 16 | 100.0°F (2012) | 35.1°F (1935) | 0.61 in (1976) |
| August 17 | 99.0°F (1977) | 41.0°F (1928) | 0.98 in (1948) |
| August 18 | 99.0°F (1977) | 39.0°F (1973) | 0.55 in (2007) |
| August 19 | 100.0°F (2016) | 36.0°F (1928) | 0.73 in (1968) |
| August 20 | 100.0°F (2009) | 36.0°F (1928) | 0.66 in (1965) |
| August 21 | 96.1°F (1951) | 36.0°F (1930) | 0.64 in (1997) |
| August 22 | 96.1°F (1934) | 39.0°F (1931) | 1.97 in (2004) |
| August 23 | 97.0°F (2025) | 37.9°F (1938) | 1.03 in (1950) |
| August 24 | 98.1°F (2025) | 39.0°F (1930) | 1.91 in (1977) |
| August 25 | 98.1°F (1958) | 37.9°F (1929) | 0.96 in (1963) |
| August 26 | 97.0°F (2016) | 41.0°F (1930) | 1.79 in (1926) |
| August 27 | 97.0°F (1986) | 37.9°F (1937) | 0.62 in (1997) |
| August 28 | 99.0°F (2017) | 37.0°F (1937) | 0.89 in (1983) |
| August 29 | 100.0°F (1967) | 37.0°F (1939) | 0.52 in (1927) |
| August 30 | 98.1°F (2022) | 39.9°F (1936) | 1.37 in (1983) |
| August 31 | 93.9°F (1987) | 39.0°F (1973) | 1.58 in (1939) |