Coulee Dam, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 23° 33° -17° (1950) 61° (1981) 1.06" NA
February 25° 40° -15° (1950) 61° (1995) 1" NA
March 31° 52° 0° (1955) 73° (1994) 0.91" NA
April 37° 61° 21° (2008) 91° (1977) 0.87" NA
May 45° 70° 21° (2002) 100° (1986) 1.15" NA
June 51° 78° 36° (2001) 102° (1973) 1.05" NA
July 58° 87° 40° (2000) 108° (1960) 0.64" NA
August 57° 87° 38° (1951) 110° (1961) 0.28" NA
September 49° 77° 30° (1974) 103° (1988) 0.44" NA
October 39° 61° 7° (2002) 84° (2003) 0.68" NA
November 30° 43° -10° (1985) 69° (1989) 1.3" NA
December 22° 32° -16° (1968) 58° (2007) 1.45" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 55° 83° 42° (1978) 94° (1985) 0.03" NA
Jul 2 55° 83° 40° (2000) 96° (1967) 0.03" NA
Jul 3 55° 84° 43° (1955) 100° (1968) 0.03" NA
Jul 4 55° 84° 46° (1983) 102° (1985) 0.03" NA
Jul 5 56° 84° 44° (1980) 104° (1968) 0.02" NA
Jul 6 56° 85° 43° (1977) 105° (1968) 0.03" NA
Jul 7 56° 85° 42° (1971) 102° (1968) 0.03" NA
Jul 8 56° 85° 42° (1981) 102° (1968) 0.02" NA
Jul 9 57° 86° 45° (1983) 107° (1985) 0.03" NA
Jul 10 57° 86° 41° (1972) 104° (1985) 0.02" NA
Jul 11 57° 86° 45° (1971) 104° (1975) 0.03" NA
Jul 12 57° 87° 47° (1974) 103° (2002) 0.02" NA
Jul 13 58° 87° 49° (1948) 103° (2002) 0.03" NA
Jul 14 58° 87° 49° (1981) 102° (1955) 0.01" NA
Jul 15 58° 87° 46° (1982) 103° (1985) 0.02" NA
Jul 16 58° 88° 43° (1986) 99° (1960) 0.02" NA
Jul 17 58° 88° 47° (2001) 105° (1979) 0.02" NA
Jul 18 58° 88° 48° (1962) 108° (1960) 0.02" NA
Jul 19 59° 88° 46° (1951) 105° (1979) 0.02" NA
Jul 20 59° 89° 45° (1951) 105° (1985) 0.01" NA
Jul 21 59° 89° 47° (1951) 104° (1994) 0.02" NA
Jul 22 59° 89° 46° (2001) 106° (2006) 0.02" NA
Jul 23 59° 89° 46° (1963) 107° (2006) 0.01" NA
Jul 24 59° 89° 49° (1948) 106° (2006) 0.02" NA
Jul 25 59° 89° 48° (1949) 103° (1984) 0.02" NA
Jul 26 59° 89° 47° (1951) 103° (1998) 0.01" NA
Jul 27 59° 90° 49° (1951) 103° (1998) 0.02" NA
Jul 28 59° 90° 47° (1959) 103° (1998) 0.01" NA
Jul 29 60° 90° 50° (1950) 104° (2003) 0.01" NA
Jul 30 60° 90° 41° (2001) 103° (2003) 0.02" NA
Jul 31 60° 90° 45° (2006) 102° (2003) 0.01" NA
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