Grass Valley, Oregon
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 25° 38° -22° (1957) 63° (2003) 1.57" 5.7"
February 28° 44° -23° (1950) 68° (1932) 1.14" 2.9"
March 32° 51° 3° (1993) 75° (1939) 1.09" 1.2"
April 36° 58° 19° (1966) 87° (1977) 0.88" 0.2"
May 41° 66° 20° (1954) 100° (1986) 0.89" 0"
June 47° 73° 27° (1976) 102° (1992) 0.62" 0"
July 53° 82° 34° (1954) 111° (1939) 0.31" 0"
August 53° 82° 31° (1980) 106° (1998) 0.38" 0"
September 45° 74° 23° (1980) 100° (1998) 0.52" 0"
October 37° 62° 7° (2002) 88° (1991) 0.85" 0.2"
November 31° 47° -15° (1985) 71° (1999) 1.64" 2.6"
December 25° 38° -16° (1990) 63° (1989) 1.54" 6.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 49° 78° 37° (1999) 97° (1998) 0.01" NA
Sep 2 49° 78° 37° (1999) 100° (1998) 0.01" NA
Sep 3 49° 78° 29° (1980) 95° (1998) 0.01" NA
Sep 4 48° 78° 36° (1956) 97° (1988) 0.01" NA
Sep 5 48° 77° 34° (1956) 99° (1988) 0.01" NA
Sep 6 48° 77° 34° (1928) 98° (1955) 0.01" NA
Sep 7 47° 77° 35° (1985) 97° (1944) 0.01" NA
Sep 8 47° 76° 34° (1962) 95° (1944) 0.01" NA
Sep 9 47° 76° 33° (1970) 95° (1944) 0.02" NA
Sep 10 46° 76° 34° (1964) 97° (1944) 0.02" NA
Sep 11 46° 75° 36° (1964) 95° (1944) 0.02" NA
Sep 12 46° 75° 34° (1949) 93° (1944) 0.02" NA
Sep 13 45° 75° 32° (1970) 91° (1929) 0.02" NA
Sep 14 45° 74° 32° (1952) 93° (1938) 0.02" NA
Sep 15 45° 74° 31° (1982) 94° (1938) 0.02" NA
Sep 16 45° 74° 32° (1936) 95° (1938) 0.02" NA
Sep 17 44° 73° 26° (1965) 96° (1938) 0.02" NA
Sep 18 44° 73° 28° (1965) 92° (1981) 0.02" NA
Sep 19 44° 73° 33° (1957) 89° (1952) 0.02" NA
Sep 20 43° 72° 28° (1983) 89° (1936) 0.02" NA
Sep 21 43° 72° 23° (1980) 93° (1939) 0.02" NA
Sep 22 43° 72° 30° (1955) 90° (1938) 0.02" NA
Sep 23 43° 71° 24° (2000) 90° (1952) 0.02" NA
Sep 24 42° 71° 27° (2000) 90° (1952) 0.02" NA
Sep 25 42° 71° 28° (1970) 94° (1952) 0.02" NA
Sep 26 42° 70° 23° (1980) 92° (1994) 0.02" NA
Sep 27 41° 70° 27° (1972) 88° (1994) 0.02" NA
Sep 28 41° 70° 28° (1983) 90° (1967) 0.02" NA
Sep 29 41° 69° 26° (1983) 91° (1967) 0.02" NA
Sep 30 41° 69° 24° (1954) 85° (1970) 0.02" NA
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