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
Mar 1 33° 49° 23° (1970) 65° (1981) 0.37" NA
Mar 2 33° 49° 20° (1995) 69° (1986) 0.37" NA
Mar 3 33° 49° 16° (1989) 63° (1986) 0.37" NA
Mar 4 33° 49° 17° (1976) 64° (2005) 0.36" NA
Mar 5 33° 49° 27° (1970) 63° (1984) 0.36" NA
Mar 6 33° 50° 27° (1998) 67° (1984) 0.36" NA
Mar 7 33° 50° 19° (1974) 74° (2001) 0.35" NA
Mar 8 33° 50° 22° (1974) 68° (2005) 0.35" NA
Mar 9 33° 50° 27° (1970) 72° (2005) 0.35" NA
Mar 10 33° 50° 25° (1975) 68° (2005) 0.34" NA
Mar 11 34° 51° 26° (1985) 71° (2005) 0.34" NA
Mar 12 34° 51° 27° (2006) 70° (2005) 0.34" NA
Mar 13 34° 51° 27° (1985) 68° (1979) 0.34" NA
Mar 14 34° 51° 28° (1985) 70° (1979) 0.33" NA
Mar 15 34° 51° 28° (1985) 66° (2005) 0.33" NA
Mar 16 34° 52° 26° (1982) 69° (1985) 0.33" NA
Mar 17 34° 52° 27° (1982) 70° (1972) 0.33" NA
Mar 18 34° 52° 27° (1971) 68° (1988) 0.32" NA
Mar 19 34° 52° 28° (1970) 64° (1981) 0.32" NA
Mar 20 34° 52° 28° (1971) 70° (1998) 0.32" NA
Mar 21 34° 53° 24° (2002) 70° (1992) 0.32" NA
Mar 22 35° 53° 27° (1982) 73° (2004) 0.31" NA
Mar 23 35° 53° 28° (1973) 71° (1979) 0.31" NA
Mar 24 35° 53° 29° (1982) 72° (2001) 0.31" NA
Mar 25 35° 54° 25° (1996) 70° (1997) 0.31" NA
Mar 26 35° 54° 28° (1991) 66° (1994) 0.3" NA
Mar 27 35° 54° 25° (1975) 73° (1994) 0.3" NA
Mar 28 35° 54° 27° (1996) 80° (1994) 0.3" NA
Mar 29 35° 55° 29° (1972) 77° (1994) 0.3" NA
Mar 30 35° 55° 29° (1970) 75° (2004) 0.3" NA
Mar 31 35° 55° 29° (1970) 72° (1987) 0.3" NA
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