Index, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 31° 40° 3° (1982) 62° (2005) 16.05" 20.5"
February 32° 46° 6° (1989) 73° (1992) 11.92" 11"
March 34° 52° 16° (1989) 80° (1994) 10.24" 3.8"
April 38° 59° 27° (1975) 91° (1998) 7.83" 1"
May 43° 65° 30° (1972) 100° (1983) 5.58" 0"
June 48° 69° 31° (1976) 98° (1970) 4.04" 0"
July 51° 75° 37° (1971) 100° (2006) 2.41" 0"
August 52° 75° 38° (1973) 98° (1981) 2.45" 0"
September 47° 70° 30° (1972) 98° (1988) 4.77" 0"
October 41° 59° 23° (2002) 86° (1980) 9.97" 0"
November 35° 46° 8° (1985) 70° (1970) 18.03" 6"
December 31° 40° 1° (1990) 60° (2002) 16.63" 15.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jun 1 46° 67° 34° (1984) 89° (1970) 0.15" NA
Jun 2 46° 67° 38° (1972) 98° (1970) 0.15" NA
Jun 3 46° 67° 31° (1976) 87° (1978) 0.15" NA
Jun 4 46° 68° 34° (1976) 91° (2000) 0.15" NA
Jun 5 46° 68° 36° (1976) 88° (1978) 0.15" NA
Jun 6 47° 68° 42° (1971) 88° (2003) 0.15" NA
Jun 7 47° 68° 38° (1975) 93° (2003) 0.15" NA
Jun 8 47° 68° 39° (1975) 92° (2003) 0.15" NA
Jun 9 47° 68° 35° (1971) 80° (1995) 0.15" NA
Jun 10 47° 68° 39° (1973) 85° (1982) 0.15" NA
Jun 11 47° 68° 42° (1973) 84° (1982) 0.14" NA
Jun 12 47° 69° 40° (1988) 81° (1986) 0.14" NA
Jun 13 48° 69° 39° (1976) 92° (2002) 0.14" NA
Jun 14 48° 69° 36° (1976) 91° (2002) 0.14" NA
Jun 15 48° 69° 38° (1979) 81° (1988) 0.14" NA
Jun 16 48° 69° 39° (1985) 80° (1982) 0.14" NA
Jun 17 48° 69° 39° (1984) 87° (1977) 0.13" NA
Jun 18 48° 70° 39° (1984) 94° (1982) 0.13" NA
Jun 19 48° 70° 40° (1996) 90° (1982) 0.13" NA
Jun 20 49° 70° 42° (1997) 86° (1970) 0.13" NA
Jun 21 49° 70° 41° (1989) 90° (1973) 0.13" NA
Jun 22 49° 71° 43° (2000) 88° (2004) 0.13" NA
Jun 23 49° 71° 42° (1987) 88° (1992) 0.12" NA
Jun 24 49° 71° 42° (1971) 87° (1982) 0.12" NA
Jun 25 49° 71° 40° (1976) 85° (1989) 0.12" NA
Jun 26 49° 71° 41° (1976) 93° (2000) 0.12" NA
Jun 27 49° 72° 41° (1976) 93° (2006) 0.11" NA
Jun 28 50° 72° 42° (1980) 90° (2000) 0.11" NA
Jun 29 50° 72° 41° (1973) 91° (1987) 0.11" NA
Jun 30 50° 72° 40° (1971) 91° (1995) 0.11" NA
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