Prosser, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 25° 41° -18° (1957) 69° (1971) 0.96" NA
February 29° 48° -20° (1950) 69° (1988) 0.7" NA
March 34° 58° 6° (1955) 81° (1960) 0.67" NA
April 39° 66° 14° (1935) 91° (1977) 0.64" NA
May 45° 75° 26° (1954) 100° (2001) 0.65" NA
June 51° 82° 32° (1934) 105° (1992) 0.56" NA
July 55° 89° 37° (1971) 111° (2002) 0.24" NA
August 54° 89° 36° (2000) 106° (1998) 0.35" NA
September 47° 80° 21° (2000) 99° (2003) 0.48" NA
October 38° 68° 11° (1935) 90° (1932) 0.65" NA
November 32° 51° -7° (1985) 76° (1999) 1.03" NA
December 26° 41° -14° (1983) 66° (1987) 1.18" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Feb 1 27° 44° -19° (1950) 66° (1971) 0.03" NA
Feb 2 27° 44° -19° (1950) 61° (1934) 0.03" NA
Feb 3 27° 44° -20° (1950) 59° (1968) 0.03" NA
Feb 4 27° 45° -17° (1950) 60° (1962) 0.03" NA
Feb 5 27° 45° 2° (1932) 65° (1967) 0.03" NA
Feb 6 28° 45° 3° (1948) 61° (1965) 0.03" NA
Feb 7 28° 46° 0° (1936) 63° (1945) 0.03" NA
Feb 8 28° 46° 0° (1936) 60° (1953) 0.03" NA
Feb 9 28° 46° -8° (1933) 58° (1951) 0.03" NA
Feb 10 28° 47° 7° (1937) 63° (1951) 0.03" NA
Feb 11 28° 47° 2° (1936) 64° (1951) 0.03" NA
Feb 12 29° 47° 12° (1948) 61° (1971) 0.03" NA
Feb 13 29° 48° -5° (1933) 68° (1977) 0.03" NA
Feb 14 29° 48° 3° (1936) 64° (1971) 0.03" NA
Feb 15 29° 48° 3° (1936) 62° (1982) 0.02" NA
Feb 16 29° 48° -1° (1936) 65° (1982) 0.02" NA
Feb 17 29° 49° -4° (1936) 67° (1977) 0.02" NA
Feb 18 30° 49° 10° (1936) 66° (1965) 0.02" NA
Feb 19 30° 49° 14° (1936) 63° (1965) 0.02" NA
Feb 20 30° 50° 10° (1956) 65° (1965) 0.02" NA
Feb 21 30° 50° 16° (1993) 69° (1988) 0.02" NA
Feb 22 30° 51° 10° (1993) 68° (1947) 0.02" NA
Feb 23 30° 51° 18° (1944) 68° (1947) 0.02" NA
Feb 24 31° 51° 15° (1969) 65° (1986) 0.02" NA
Feb 25 31° 52° 13° (2001) 69° (1986) 0.02" NA
Feb 26 31° 52° 9° (1962) 69° (1932) 0.02" NA
Feb 27 31° 52° 8° (1960) 65° (1953) 0.02" NA
Feb 28 31° 53° 10° (1960) 67° (1972) 0.02" NA
Feb 29 31° 53° 9° (1960) 66° (1972) 0.02" NA
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