Mattawa, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 29° 41° -12° (1996) 71° (1971) 1.02" 2.2"
February 32° 47° -10° (1996) 72° (1986) 0.69" 0.3"
March 38° 58° 11° (1993) 82° (1960) 0.63" 0"
April 44° 66° 25° (1964) 94° (1977) 0.53" 0"
May 52° 75° 30° (1989) 105° (1986) 0.45" 0"
June 59° 82° 35° (1973) 110° (1961) 0.45" 0"
July 66° 91° 47° (1996) 112° (2006) 0.22" 0"
August 65° 90° 42° (1999) 110° (1972) 0.15" 0"
September 56° 80° 33° (1996) 105° (1998) 0.27" 0"
October 45° 65° 18° (1984) 87° (1993) 0.52" 0"
November 35° 50° -7° (1985) 76° (1999) 1.1" 0.2"
December 28° 39° -7° (1968) 71° (1980) 1.41" 0.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jun 1 56° 79° 41° (1965) 105° (1986) 0.02" 0"
Jun 2 56° 79° 40° (1966) 101° (1957) 0.02" 0"
Jun 3 57° 79° 46° (1966) 100° (1970) 0.02" 0"
Jun 4 57° 79° 43° (1963) 104° (1969) 0.02" 0"
Jun 5 57° 80° 40° (1963) 100° (1957) 0.02" 0"
Jun 6 57° 80° 37° (1995) 102° (1970) 0.02" 0"
Jun 7 57° 80° 47° (1991) 100° (1977) 0.02" 0"
Jun 8 58° 80° 45° (1967) 93° (1969) 0.02" 0"
Jun 9 58° 80° 44° (1963) 93° (1965) 0.02" 0"
Jun 10 58° 81° 43° (1970) 98° (1965) 0.01" 0"
Jun 11 58° 81° 44° (1990) 96° (1986) 0.02" 0"
Jun 12 58° 81° 46° (1990) 98° (1969) 0.01" 0"
Jun 13 58° 81° 44° (1991) 98° (1986) 0.02" 0"
Jun 14 59° 81° 46° (1995) 99° (1974) 0.02" 0"
Jun 15 59° 82° 51° (1964) 103° (1961) 0.01" 0"
Jun 16 59° 82° 35° (1973) 109° (1961) 0.02" 0"
Jun 17 59° 82° 45° (1973) 110° (1961) 0.01" 0"
Jun 18 59° 82° 41° (1971) 105° (1961) 0.02" 0"
Jun 19 60° 83° 46° (1996) 100° (1958) 0.01" 0"
Jun 20 60° 83° 49° (1981) 103° (1970) 0.02" 0"
Jun 21 60° 83° 52° (1991) 102° (1992) 0.01" 0"
Jun 22 60° 84° 41° (1963) 103° (1970) 0.02" 0"
Jun 23 61° 84° 50° (1966) 109° (1992) 0.01" 0"
Jun 24 61° 84° 49° (1996) 106° (1992) 0.01" 0"
Jun 25 61° 84° 49° (1976) 104° (1992) 0.01" 0"
Jun 26 61° 85° 44° (1991) 103° (1987) 0.01" 0"
Jun 27 61° 85° 42° (1963) 104° (2006) 0.01" 0"
Jun 28 62° 86° 48° (1975) 102° (2000) 0" 0"
Jun 29 62° 86° 49° (1963) 101° (1987) 0.01" 0"
Jun 30 62° 86° 50° (1961) 104° (1987) 0.01" 0"
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