Plymouth, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 29° 40° -22° (1957) 67° (1990) 1.01" NA
February 31° 46° -7° (1996) 70° (1982) 0.77" NA
March 35° 56° 12° (1993) 79° (1960) 0.75" NA
April 41° 63° 29° (1997) 90° (1977) 0.62" NA
May 48° 71° 34° (2002) 104° (1983) 0.65" NA
June 54° 78° 35° (1974) 106° (1961) 0.43" NA
July 60° 86° 43° (1963) 110° (1960) 0.25" NA
August 60° 86° 43° (1964) 111° (1961) 0.37" NA
September 52° 76° 34° (1983) 103° (1955) 0.39" NA
October 43° 64° 20° (2002) 87° (1988) 0.59" NA
November 36° 49° -2° (1955) 75° (1999) 1.18" NA
December 30° 41° -9° (1983) 68° (2007) 1.12" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 44° 67° 36° (1986) 88° (1998) 0.02" NA
May 2 45° 68° 38° (1959) 83° (1957) 0.02" NA
May 3 45° 68° 37° (1959) 86° (1971) 0.02" NA
May 4 45° 68° 35° (1964) 88° (1971) 0.02" NA
May 5 45° 68° 35° (1982) 93° (1966) 0.02" NA
May 6 46° 69° 38° (1984) 91° (1987) 0.02" NA
May 7 46° 69° 36° (2002) 91° (1987) 0.02" NA
May 8 46° 69° 34° (2002) 89° (1994) 0.02" NA
May 9 46° 70° 37° (1996) 97° (1987) 0.03" NA
May 10 46° 70° 35° (1999) 95° (1987) 0.03" NA
May 11 47° 70° 35° (1958) 92° (1969) 0.03" NA
May 12 47° 70° 38° (1985) 92° (1969) 0.02" NA
May 13 47° 71° 38° (2004) 98° (1993) 0.02" NA
May 14 47° 71° 36° (1964) 88° (1972) 0.02" NA
May 15 48° 71° 41° (1955) 92° (1973) 0.02" NA
May 16 48° 71° 38° (2002) 92° (1973) 0.02" NA
May 17 48° 71° 40° (1971) 93° (1973) 0.02" NA
May 18 48° 72° 41° (1971) 93° (1973) 0.02" NA
May 19 49° 72° 42° (1987) 94° (2006) 0.02" NA
May 20 49° 72° 41° (1975) 90° (2006) 0.02" NA
May 21 49° 72° 40° (1960) 96° (1958) 0.02" NA
May 22 49° 73° 40° (1960) 94° (1967) 0.02" NA
May 23 49° 73° 34° (1986) 92° (1979) 0.02" NA
May 24 50° 73° 42° (1977) 95° (1985) 0.02" NA
May 25 50° 73° 40° (1964) 93° (1958) 0.02" NA
May 26 50° 73° 35° (1961) 94° (1958) 0.02" NA
May 27 50° 74° 43° (1977) 94° (2001) 0.02" NA
May 28 50° 74° 40° (1976) 92° (1983) 0.02" NA
May 29 51° 74° 37° (1962) 100° (1983) 0.02" NA
May 30 51° 74° 40° (1964) 104° (1983) 0.02" NA
May 31 51° 74° 39° (1966) 100° (1957) 0.02" NA
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