Index, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 32° 43° 3° (1982) 62° (2005) 15.95" 15.8"
February 32° 48° 6° (1989) 73° (1992) 10.61" 8.2"
March 35° 53° 16° (1989) 80° (1994) 10.39" 3.2"
April 38° 59° 27° (1975) 91° (1998) 7.83" 0.9"
May 44° 65° 30° (1972) 100° (1983) 5.56" 0"
June 49° 70° 31° (1976) 98° (1970) 4.2" 0"
July 52° 76° 37° (1971) 100° (2006) 2.06" 0"
August 52° 76° 38° (1973) 98° (1981) 1.96" 0"
September 48° 71° 30° (1972) 98° (1988) 4.55" 0"
October 42° 59° 23° (2002) 86° (1980) 11" 0"
November 36° 47° 8° (1985) 70° (1970) 18.94" 4.6"
December 31° 41° 1° (1990) 60° (2002) 13.98" 16.6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 51° 73° 42° (1972) 87° (1995) 0.1" 0"
Jul 2 51° 73° 37° (1971) 89° (1985) 0.1" 0"
Jul 3 51° 74° 38° (1971) 90° (1970) 0.09" 0"
Jul 4 51° 74° 43° (1988) 93° (1972) 0.09" 0"
Jul 5 51° 74° 41° (1996) 87° (2009) 0.09" 0"
Jul 6 51° 74° 41° (1974) 88° (2009) 0.08" 0"
Jul 7 51° 75° 39° (1971) 83° (1985) 0.09" 0"
Jul 8 51° 75° 43° (1984) 85° (1985) 0.08" 0"
Jul 9 52° 75° 43° (1984) 94° (2010) 0.08" 0"
Jul 10 52° 75° 44° (1972) 93° (2010) 0.07" 0"
Jul 11 52° 75° 43° (2008) 93° (2002) 0.08" 0"
Jul 12 52° 76° 43° (1973) 96° (2007) 0.08" 0"
Jul 13 52° 76° 43° (1970) 87° (2008) 0.07" 0"
Jul 14 52° 76° 43° (1979) 90° (1996) 0.07" 0"
Jul 15 52° 76° 44° (2000) 92° (1970) 0.07" 0"
Jul 16 52° 76° 44° (2000) 95° (1979) 0.06" 0"
Jul 17 52° 77° 46° (1974) 91° (1979) 0.06" 0"
Jul 18 53° 77° 41° (1976) 91° (1985) 0.06" 0"
Jul 19 53° 77° 41° (1977) 95° (1988) 0.06" 0"
Jul 20 53° 77° 43° (1974) 95° (1994) 0.06" 0"
Jul 21 53° 77° 46° (1984) 92° (1990) 0.05" 0"
Jul 22 53° 77° 41° (1982) 100° (2006) 0.05" 0"
Jul 23 53° 77° 41° (1982) 95° (1991) 0.05" 0"
Jul 24 53° 77° 41° (1973) 97° (2004) 0.05" 0"
Jul 25 53° 77° 46° (1974) 97° (2004) 0.05" 0"
Jul 26 53° 78° 45° (2003) 93° (1998) 0.05" 0"
Jul 27 53° 78° 41° (1976) 94° (1998) 0.05" 0"
Jul 28 53° 78° 45° (1976) 96° (1998) 0.04" 0"
Jul 29 53° 78° 44° (1980) 98° (2009) 0.04" 0"
Jul 30 53° 78° 44° (1986) 100° (2009) 0.05" 0"
Jul 31 53° 78° 43° (2008) 101° (2009) 0.04" 0"
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