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
Mar 1 31° 53° 14° (1960) 67° (1967) 0.03" NA
Mar 2 32° 54° 11° (1960) 70° (1936) 0.03" NA
Mar 3 32° 54° 13° (1976) 65° (1968) 0.03" NA
Mar 4 32° 54° 11° (1960) 68° (1968) 0.03" NA
Mar 5 32° 55° 6° (1955) 67° (1987) 0.03" NA
Mar 6 32° 55° 13° (1943) 66° (1972) 0.02" NA
Mar 7 32° 55° 15° (1951) 71° (1979) 0.02" NA
Mar 8 33° 56° 19° (1931) 73° (2005) 0.02" NA
Mar 9 33° 56° 18° (1943) 71° (2005) 0.02" NA
Mar 10 33° 56° 17° (1948) 74° (2005) 0.02" NA
Mar 11 33° 57° 19° (1948) 70° (2005) 0.02" NA
Mar 12 33° 57° 20° (1954) 73° (2005) 0.02" NA
Mar 13 33° 57° 20° (1954) 73° (2005) 0.02" NA
Mar 14 34° 58° 18° (1941) 77° (1934) 0.02" NA
Mar 15 34° 58° 18° (2002) 74° (1940) 0.02" NA
Mar 16 34° 58° 21° (1955) 72° (1947) 0.02" NA
Mar 17 34° 59° 21° (1951) 75° (1947) 0.02" NA
Mar 18 34° 59° 14° (1965) 76° (2007) 0.02" NA
Mar 19 34° 59° 13° (1965) 75° (1934) 0.02" NA
Mar 20 34° 59° 18° (1948) 76° (1947) 0.02" NA
Mar 21 35° 60° 16° (1935) 74° (1999) 0.02" NA
Mar 22 35° 60° 20° (1935) 76° (1939) 0.02" NA
Mar 23 35° 60° 19° (1948) 78° (1939) 0.02" NA
Mar 24 35° 61° 17° (1942) 80° (1939) 0.02" NA
Mar 25 35° 61° 21° (1990) 73° (1960) 0.02" NA
Mar 26 35° 61° 21° (1942) 81° (1960) 0.02" NA
Mar 27 36° 61° 13° (1944) 75° (1937) 0.02" NA
Mar 28 36° 62° 17° (1975) 73° (1960) 0.02" NA
Mar 29 36° 62° 15° (1954) 76° (1994) 0.02" NA
Mar 30 36° 62° 18° (1954) 77° (1966) 0.02" NA
Mar 31 36° 62° 22° (1952) 77° (2003) 0.02" NA
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