August weather in Sisters, OR
The average temperature in Sisters in August is 63.5°F (42.4°F–84.5°F). Average precipitation: 0.60 inches.
August is a summer month in Sisters, and is warmer than the annual average of 45.5°F. Daily temperatures swing about 42.1°F between overnight low and afternoon high. Daylight averages about 13h 51m. For travel, August is a comfortable month to visit.
Avg High
84.5°F
Avg Low
42.4°F
Precipitation
0.60 in
Daylight
13h 51m
August records in Sisters
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.9°F (2015) | 30.0°F (1963) | 0.16 in (1964) |
| August 2 | 100.9°F (1977) | 32.0°F (1982) | 0.12 in (1976) |
| August 3 | 100.9°F (1977) | 30.9°F (1982) | 0.28 in (1976) |
| August 4 | 100.9°F (1998) | 33.1°F (1980) | 0.70 in (1999) |
| August 5 | 105.1°F (1998) | 30.0°F (1964) | 0.37 in (1999) |
| August 6 | 104.0°F (1972) | 27.0°F (1980) | 0.55 in (1999) |
| August 7 | 106.0°F (1972) | 30.0°F (2002) | 0.50 in (2003) |
| August 8 | 100.0°F (1981) | 30.0°F (2002) | 0.12 in (1962) |
| August 9 | 100.0°F (1971) | 28.9°F (1985) | 0.55 in (1989) |
| August 10 | 100.9°F (2018) | 32.0°F (1992) | 0.10 in (2013) |
| August 11 | 102.9°F (1996) | 30.0°F (1991) | 0.25 in (2015) |
| August 12 | 102.0°F (1981) | 30.9°F (1995) | 0.17 in (1965) |
| August 13 | 102.9°F (1977) | 27.0°F (1995) | 0.10 in (2014) |
| August 14 | 100.0°F (1998) | 30.0°F (1974) | 0.19 in (1992) |
| August 15 | 102.9°F (2008) | 30.0°F (2009) | 0.66 in (1976) |
| August 16 | 102.9°F (2008) | 30.9°F (1989) | 0.44 in (1968) |
| August 17 | 100.0°F (1967) | 28.9°F (1987) | 0.25 in (1990) |
| August 18 | 102.0°F (1977) | 26.1°F (1973) | 0.31 in (1975) |
| August 19 | 100.9°F (1977) | 28.0°F (1973) | 0.61 in (1991) |
| August 20 | 100.9°F (2009) | 28.9°F (1980) | 0.28 in (1993) |
| August 21 | 96.1°F (1977) | 26.1°F (1985) | 0.64 in (1993) |
| August 22 | 96.1°F (1977) | 28.9°F (1973) | 0.43 in (2004) |
| August 23 | 96.1°F (1969) | 28.9°F (1971) | 0.24 in (2013) |
| August 24 | 97.0°F (1958) | 25.0°F (1992) | 0.51 in (1997) |
| August 25 | 96.1°F (1996) | 27.0°F (1992) | 0.27 in (1965) |
| August 26 | 97.0°F (2010) | 28.0°F (1993) | 0.32 in (2013) |
| August 27 | 96.1°F (1972) | 28.0°F (1962) | 0.07 in (1996) |
| August 28 | 97.0°F (1972) | 26.1°F (1980) | 0.16 in (1975) |
| August 29 | 99.0°F (1998) | 26.1°F (1980) | 0.45 in (1979) |
| August 30 | 98.1°F (1967) | 28.0°F (1965) | 0.23 in (1989) |
| August 31 | 95.0°F (1968) | 26.1°F (1977) | 1.20 in (2004) |