Grand Coulee, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 21° 33° -17° (1950) 61° (1981) 1" NA
February 26° 40° -15° (1950) 61° (1995) 1.01" NA
March 32° 51° 0° (1955) 73° (1994) 0.98" NA
April 38° 62° 23° (2002) 91° (1977) 0.83" NA
May 45° 71° 21° (2002) 100° (1986) 1.28" NA
June 52° 78° 36° (2001) 102° (1973) 0.95" NA
July 58° 86° 40° (2000) 108° (1960) 0.67" NA
August 58° 86° 38° (1951) 110° (1961) 0.48" NA
September 49° 76° 30° (1974) 103° (1988) 0.54" NA
October 40° 61° 7° (2002) 84° (2003) 0.6" NA
November 31° 43° -10° (1985) 69° (1989) 1.32" NA
December 23° 33° -16° (1968) 58° (2007) 1.48" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 21° 31° -8° (1952) 46° (1997) 0.04" NA
Jan 2 21° 31° -6° (1993) 45° (1963) 0.04" NA
Jan 3 21° 31° -10° (1950) 47° (1989) 0.04" NA
Jan 4 21° 31° -6° (1950) 46° (1984) 0.04" NA
Jan 5 21° 31° -5° (1979) 51° (1954) 0.04" NA
Jan 6 21° 31° -7° (1993) 47° (1990) 0.04" NA
Jan 7 21° 31° -10° (1979) 50° (1990) 0.04" NA
Jan 8 21° 31° -6° (1979) 51° (2002) 0.03" NA
Jan 9 21° 32° -3° (1974) 51° (1953) 0.03" NA
Jan 10 21° 32° -9° (1949) 50° (2006) 0.03" NA
Jan 11 21° 32° -2° (1949) 48° (1983) 0.03" NA
Jan 12 21° 32° 1° (1949) 48° (1953) 0.03" NA
Jan 13 21° 32° -4° (1950) 46° (1953) 0.03" NA
Jan 14 21° 32° -10° (1950) 52° (1999) 0.03" NA
Jan 15 21° 32° -11° (1950) 50° (1961) 0.03" NA
Jan 16 21° 32° -8° (1950) 48° (1974) 0.03" NA
Jan 17 21° 32° -12° (1950) 50° (1976) 0.03" NA
Jan 18 21° 32° -16° (1950) 51° (1989) 0.03" NA
Jan 19 21° 33° -7° (1962) 48° (1968) 0.03" NA
Jan 20 21° 33° -9° (1954) 48° (1968) 0.03" NA
Jan 21 21° 33° -2° (1962) 48° (1972) 0.03" NA
Jan 22 22° 33° 0° (1962) 61° (1981) 0.03" NA
Jan 23 22° 33° -10° (1969) 48° (1970) 0.03" NA
Jan 24 22° 33° -12° (1957) 50° (1981) 0.03" NA
Jan 25 22° 34° -13° (1950) 48° (1984) 0.03" NA
Jan 26 22° 34° -15° (1957) 53° (2003) 0.03" NA
Jan 27 22° 34° -11° (1957) 50° (1983) 0.03" NA
Jan 28 22° 35° -10° (1969) 51° (1992) 0.03" NA
Jan 29 22° 35° -12° (1950) 53° (1967) 0.03" NA
Jan 30 23° 35° -17° (1950) 55° (1971) 0.03" NA
Jan 31 23° 35° -13° (1950) 57° (1971) 0.03" NA
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