August weather in Grass Valley, OR
The average temperature in Grass Valley in August is 68.2°F (52.6°F–83.8°F). Average precipitation: 0.20 inches.
August is a summer month in Grass Valley, and is warmer than the annual average of 49°F. Daily temperatures swing about 31.2°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 13h 55m. For travel, August is a comfortable month to visit.
Avg High
83.8°F
Avg Low
52.6°F
Precipitation
0.20 in
Daylight
13h 55m
August records in Grass Valley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 109.9°F (2022) | 42.1°F (1987) | 0.13 in (1964) |
| August 2 | 105.1°F (2009) | 39.9°F (1964) | 0.03 in (1979) |
| August 3 | 102.0°F (1939) | 43.0°F (1924) | 0.57 in (1934) |
| August 4 | 104.0°F (1961) | 41.0°F (1950) | 0.23 in (1957) |
| August 5 | 106.0°F (1998) | 39.9°F (1964) | 0.55 in (1943) |
| August 6 | 100.9°F (1990) | 35.1°F (1980) | 0.14 in (2003) |
| August 7 | 102.9°F (1972) | 37.9°F (1946) | 0.49 in (1962) |
| August 8 | 105.1°F (1972) | 39.9°F (1938) | 0.12 in (1999) |
| August 9 | 100.0°F (1981) | 41.0°F (1955) | 0.13 in (1989) |
| August 10 | 100.9°F (1971) | 41.0°F (1964) | 0.07 in (2013) |
| August 11 | 102.9°F (1971) | 42.1°F (2002) | 0.50 in (2019) |
| August 12 | 102.9°F (2021) | 41.0°F (2000) | 0.35 in (1963) |
| August 13 | 100.9°F (1920) | 36.0°F (1922) | 0.23 in (2014) |
| August 14 | 107.1°F (2023) | 37.9°F (1964) | 0.12 in (1979) |
| August 15 | 100.9°F (1933) | 37.9°F (1937) | 0.31 in (1976) |
| August 16 | 105.1°F (2023) | 37.9°F (1922) | 0.39 in (1918) |
| August 17 | 105.1°F (2023) | 41.0°F (1995) | 0.15 in (1972) |
| August 18 | 105.1°F (2008) | 39.0°F (1995) | 0.29 in (1990) |
| August 19 | 100.0°F (1967) | 39.0°F (1947) | 0.28 in (1918) |
| August 20 | 102.0°F (1967) | 35.1°F (1933) | 0.59 in (1965) |
| August 21 | 98.1°F (1950) | 39.0°F (1933) | 0.69 in (1979) |
| August 22 | 100.0°F (1946) | 37.9°F (1922) | 0.33 in (1989) |
| August 23 | 98.1°F (1946) | 37.9°F (2021) | 0.34 in (2004) |
| August 24 | 99.0°F (1926) | 34.0°F (1992) | 0.50 in (1997) |
| August 25 | 97.0°F (1917) | 35.1°F (2021) | 0.38 in (1978) |
| August 26 | 98.1°F (1934) | 35.1°F (2021) | 0.36 in (1968) |
| August 27 | 95.0°F (2011) | 39.9°F (1952) | 0.17 in (1968) |
| August 28 | 96.1°F (1972) | 37.9°F (2000) | 0.63 in (1975) |
| August 29 | 98.1°F (1972) | 30.9°F (1980) | 0.41 in (1920) |
| August 30 | 97.0°F (2017) | 36.0°F (1965) | 0.38 in (1990) |
| August 31 | 97.0°F (1967) | 37.0°F (1951) | 0.21 in (1937) |