Sunnyside, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 25° 40° -20° (1957) 68° (1971) 0.88" 3.7"
February 29° 48° -19° (1950) 72° (1995) 0.6" 1.4"
March 34° 58° 8° (1955) 82° (1960) 0.62" 0.1"
April 39° 67° 21° (1982) 93° (1977) 0.51" 0"
May 46° 75° 29° (1965) 104° (1986) 0.55" 0"
June 52° 82° 34° (1962) 107° (1992) 0.42" 0"
July 56° 89° 39° (1955) 111° (2006) 0.19" 0"
August 55° 89° 37° (1960) 106° (1971) 0.3" 0"
September 47° 80° 29° (1983) 103° (1987) 0.47" 0"
October 37° 67° 12° (2002) 89° (1988) 0.53" 0"
November 31° 50° -5° (1985) 77° (1999) 0.96" 1.3"
December 25° 40° -12° (1990) 67° (1950) 1.16" 5.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 43° 71° 31° (1951) 89° (1957) 0.01" NA
May 2 43° 71° 32° (1964) 90° (1998) 0.01" NA
May 3 43° 72° 32° (1949) 86° (1966) 0.01" NA
May 4 43° 72° 30° (1975) 90° (1966) 0.02" NA
May 5 44° 72° 29° (1965) 95° (1966) 0.02" NA
May 6 44° 73° 32° (1959) 98° (1966) 0.02" NA
May 7 44° 73° 32° (2002) 96° (1992) 0.02" NA
May 8 44° 73° 30° (1996) 96° (1987) 0.02" NA
May 9 45° 73° 31° (1996) 97° (1987) 0.02" NA
May 10 45° 74° 32° (1970) 95° (1987) 0.02" NA
May 11 45° 74° 30° (1985) 95° (1949) 0.02" NA
May 12 45° 74° 32° (1985) 97° (1949) 0.02" NA
May 13 46° 74° 33° (1955) 97° (1993) 0.02" NA
May 14 46° 75° 32° (1964) 93° (1949) 0.02" NA
May 15 46° 75° 35° (1974) 97° (1973) 0.02" NA
May 16 46° 75° 32° (1974) 94° (2006) 0.02" NA
May 17 46° 76° 33° (2003) 99° (2006) 0.02" NA
May 18 47° 76° 35° (1950) 99° (2006) 0.02" NA
May 19 47° 76° 34° (1987) 97° (1956) 0.02" NA
May 20 47° 76° 37° (1953) 92° (1958) 0.02" NA
May 21 47° 76° 33° (1960) 90° (1958) 0.02" NA
May 22 48° 77° 32° (1960) 93° (1958) 0.02" NA
May 23 48° 77° 33° (1964) 96° (1958) 0.02" NA
May 24 48° 77° 38° (1984) 101° (2001) 0.02" NA
May 25 48° 77° 34° (1964) 97° (2001) 0.02" NA
May 26 48° 78° 36° (1973) 95° (1958) 0.02" NA
May 27 49° 78° 33° (1955) 99° (1958) 0.02" NA
May 28 49° 78° 35° (1976) 95° (1983) 0.01" NA
May 29 49° 78° 35° (1951) 99° (1983) 0.01" NA
May 30 49° 78° 38° (1971) 101° (1986) 0.01" NA
May 31 50° 79° 34° (1955) 104° (1986) 0.01" NA
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