Grass Valley, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 31° 53° 15° (1979) 77° (1975) 9.86" 3.6"
February 33° 55° 9° (1989) 81° (1971) 9.21" 1.9"
March 36° 57° 19° (1970) 81° (1986) 8.52" 1.6"
April 39° 63° 26° (1999) 88° (1987) 3.69" 0.9"
May 45° 70° 27° (1988) 99° (1984) 1.97" 0"
June 51° 79° 36° (1988) 100° (2000) 0.62" 0"
July 55° 87° 40° (1987) 108° (1972) 0.18" 0"
August 54° 86° 41° (1989) 108° (1971) 0.23" 0"
September 50° 81° 35° (2007) 104° (1971) 1.1" 0"
October 43° 71° 27° (1969) 97° (2001) 2.72" 0"
November 35° 58° 19° (1977) 87° (1966) 7.08" 0.4"
December 31° 53° 3° (1972) 80° (1980) 7.89" 2.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 52° 84° 45° (1989) 98° (1998) 0.02" NA
Sep 2 52° 84° 46° (1989) 99° (1969) 0.02" NA
Sep 3 52° 84° 45° (1989) 98° (1969) 0.02" NA
Sep 4 52° 84° 43° (2000) 102° (1988) 0.03" NA
Sep 5 52° 83° 42° (1970) 100° (1988) 0.03" NA
Sep 6 52° 83° 45° (1987) 101° (1988) 0.03" NA
Sep 7 51° 83° 43° (1989) 99° (1975) 0.03" NA
Sep 8 51° 83° 42° (1978) 98° (1975) 0.03" NA
Sep 9 51° 83° 41° (1983) 95° (1984) 0.03" NA
Sep 10 51° 82° 36° (1985) 96° (1984) 0.03" NA
Sep 11 51° 82° 38° (1985) 95° (1970) 0.03" NA
Sep 12 50° 82° 38° (1985) 95° (1983) 0.04" NA
Sep 13 50° 82° 42° (1985) 100° (1971) 0.04" NA
Sep 14 50° 81° 41° (1986) 104° (1971) 0.04" NA
Sep 15 50° 81° 39° (1985) 103° (1971) 0.04" NA
Sep 16 50° 81° 40° (2006) 101° (1971) 0.04" NA
Sep 17 50° 81° 41° (1985) 98° (1971) 0.04" NA
Sep 18 49° 81° 36° (1978) 97° (1984) 0.04" NA
Sep 19 49° 80° 36° (1978) 98° (1984) 0.04" NA
Sep 20 49° 80° 36° (1986) 94° (1974) 0.04" NA
Sep 21 49° 80° 38° (1986) 95° (1974) 0.04" NA
Sep 22 48° 80° 38° (1986) 96° (1994) 0.04" NA
Sep 23 48° 79° 39° (1986) 94° (2003) 0.04" NA
Sep 24 48° 79° 38° (1972) 94° (1974) 0.04" NA
Sep 25 48° 79° 38° (1972) 94° (1974) 0.04" NA
Sep 26 48° 78° 40° (1984) 93° (1975) 0.04" NA
Sep 27 47° 78° 38° (1971) 97° (1967) 0.05" NA
Sep 28 47° 78° 35° (1986) 91° (1968) 0.05" NA
Sep 29 47° 78° 35° (2007) 92° (1970) 0.05" NA
Sep 30 47° 77° 36° (1982) 92° (1987) 0.05" NA
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