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
Dec 1 32° 54° 26° (2004) 68° (1977) 0.25" NA
Dec 2 32° 54° 26° (1967) 70° (1972) 0.25" NA
Dec 3 32° 54° 25° (1978) 69° (1976) 0.25" NA
Dec 4 32° 54° 25° (1971) 70° (1979) 0.25" NA
Dec 5 32° 54° 18° (1972) 70° (1979) 0.25" NA
Dec 6 32° 54° 19° (1978) 73° (1979) 0.25" NA
Dec 7 31° 54° 15° (1978) 72° (1979) 0.25" NA
Dec 8 31° 54° 11° (1972) 70° (1979) 0.25" NA
Dec 9 31° 53° 3° (1972) 70° (1975) 0.25" NA
Dec 10 31° 53° 3° (1972) 69° (1975) 0.24" NA
Dec 11 31° 53° 7° (1972) 66° (1973) 0.24" NA
Dec 12 31° 53° 9° (1972) 68° (1988) 0.24" NA
Dec 13 31° 53° 13° (1972) 70° (1988) 0.25" NA
Dec 14 31° 53° 13° (1972) 69° (1988) 0.25" NA
Dec 15 31° 53° 14° (1972) 65° (1976) 0.25" NA
Dec 16 31° 53° 21° (1967) 80° (1980) 0.25" NA
Dec 17 31° 53° 19° (1967) 78° (1998) 0.25" NA
Dec 18 31° 53° 20° (1984) 72° (1980) 0.25" NA
Dec 19 31° 53° 22° (1992) 68° (1985) 0.25" NA
Dec 20 31° 53° 17° (1990) 68° (1966) 0.25" NA
Dec 21 31° 53° 13° (1990) 70° (1999) 0.25" NA
Dec 22 30° 53° 11° (1990) 73° (1999) 0.26" NA
Dec 23 30° 53° 13° (1990) 70° (1985) 0.26" NA
Dec 24 30° 53° 17° (1998) 70° (1985) 0.26" NA
Dec 25 30° 53° 19° (1990) 73° (1967) 0.26" NA
Dec 26 30° 53° 18° (1988) 77° (1967) 0.26" NA
Dec 27 30° 52° 19° (1988) 73° (1967) 0.27" NA
Dec 28 31° 52° 22° (1990) 74° (1967) 0.27" NA
Dec 29 31° 52° 18° (1990) 71° (1975) 0.27" NA
Dec 30 31° 52° 18° (1990) 69° (1989) 0.28" NA
Dec 31 31° 52° 20° (1978) 68° (1989) 0.28" NA
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