May weather in Grass Valley, OR
The average temperature in Grass Valley in May is 54.5°F (41.6°F–67.4°F). Average precipitation: 0.96 inches.
May is a spring month in Grass Valley, and is warmer than the annual average of 49°F. Daily temperatures swing about 25.8°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 14h 41m. For travel, May is a comfortable month to visit.
Avg High
67.4°F
Avg Low
41.6°F
Precipitation
0.96 in
Daylight
14h 41m
May records in Grass Valley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 82.9°F (1998) | 19.9°F (1954) | 0.46 in (1987) |
| May 2 | 84.0°F (1937) | 24.1°F (1954) | 0.36 in (2022) |
| May 3 | 82.9°F (2016) | 26.1°F (1964) | 0.39 in (1975) |
| May 4 | 87.1°F (1966) | 27.0°F (1952) | 0.63 in (1951) |
| May 5 | 88.0°F (1966) | 26.1°F (1952) | 0.63 in (1983) |
| May 6 | 89.1°F (1966) | 27.0°F (1933) | 0.38 in (1958) |
| May 7 | 88.0°F (1992) | 27.0°F (2002) | 0.30 in (1983) |
| May 8 | 89.1°F (1987) | 18.0°F (1982) | 0.22 in (1991) |
| May 9 | 89.1°F (1987) | 25.0°F (1982) | 0.63 in (2005) |
| May 10 | 90.0°F (1936) | 26.1°F (1999) | 0.52 in (1961) |
| May 11 | 91.9°F (1949) | 25.0°F (1942) | 1.52 in (1977) |
| May 12 | 91.9°F (1949) | 28.0°F (1985) | 0.42 in (1945) |
| May 13 | 91.0°F (1931) | 28.0°F (2022) | 0.59 in (1971) |
| May 14 | 93.0°F (1939) | 25.0°F (1964) | 0.27 in (2022) |
| May 15 | 90.0°F (1939) | 27.0°F (1974) | 0.90 in (2011) |
| May 16 | 87.1°F (2014) | 26.1°F (1974) | 0.51 in (1921) |
| May 17 | 91.0°F (2006) | 30.9°F (1966) | 0.42 in (1998) |
| May 18 | 95.0°F (2008) | 30.0°F (1966) | 0.68 in (1957) |
| May 19 | 90.0°F (2006) | 30.0°F (1960) | 0.30 in (2019) |
| May 20 | 91.9°F (2023) | 32.0°F (1953) | 1.12 in (1932) |
| May 21 | 90.0°F (2023) | 30.0°F (1960) | 0.32 in (2016) |
| May 22 | 89.1°F (1951) | 28.9°F (1922) | 0.34 in (2013) |
| May 23 | 91.9°F (2001) | 26.1°F (1964) | 0.43 in (1989) |
| May 24 | 96.1°F (2001) | 30.9°F (1950) | 0.59 in (1942) |
| May 25 | 93.0°F (1947) | 26.1°F (1964) | 1.00 in (1998) |
| May 26 | 96.1°F (1947) | 30.0°F (1964) | 1.05 in (1953) |
| May 27 | 93.0°F (1934) | 30.0°F (1923) | 0.84 in (1945) |
| May 28 | 96.1°F (1934) | 30.0°F (1954) | 0.40 in (2013) |
| May 29 | 91.0°F (1983) | 28.0°F (1976) | 0.47 in (1932) |
| May 30 | 95.0°F (1986) | 30.9°F (1923) | 0.68 in (1998) |
| May 31 | 100.0°F (1986) | 32.0°F (1898) | 0.40 in (1990) |