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
Sep 1 57° 82° 48° (1973) 99° (1987) 0.02" NA
Sep 2 57° 81° 47° (1999) 98° (1998) 0.02" NA
Sep 3 56° 81° 47° (1956) 97° (1998) 0.02" NA
Sep 4 56° 81° 46° (1962) 95° (2003) 0.02" NA
Sep 5 56° 80° 46° (1956) 96° (1967) 0.01" NA
Sep 6 55° 80° 48° (1956) 97° (1966) 0.01" NA
Sep 7 55° 80° 44° (1960) 103° (1955) 0.01" NA
Sep 8 55° 79° 43° (1992) 90° (1958) 0.01" NA
Sep 9 54° 79° 40° (1962) 93° (1963) 0.01" NA
Sep 10 54° 79° 46° (1970) 96° (1963) 0.01" NA
Sep 11 54° 78° 45° (1970) 94° (1990) 0.01" NA
Sep 12 53° 78° 39° (1970) 93° (1990) 0.01" NA
Sep 13 53° 77° 39° (1970) 92° (1969) 0.01" NA
Sep 14 53° 77° 40° (1970) 94° (1957) 0.01" NA
Sep 15 52° 77° 42° (1982) 96° (1957) 0.01" NA
Sep 16 52° 76° 40° (1970) 94° (1975) 0.01" NA
Sep 17 52° 76° 35° (1965) 92° (1998) 0.01" NA
Sep 18 51° 75° 36° (1965) 90° (1967) 0.01" NA
Sep 19 51° 75° 40° (1957) 88° (2000) 0.01" NA
Sep 20 51° 75° 41° (1965) 91° (1967) 0.01" NA
Sep 21 50° 74° 38° (1983) 89° (1976) 0.01" NA
Sep 22 50° 74° 40° (1983) 92° (1967) 0.01" NA
Sep 23 50° 74° 40° (1993) 88° (1999) 0.01" NA
Sep 24 49° 73° 35° (2000) 85° (1990) 0.01" NA
Sep 25 49° 73° 36° (2000) 90° (2001) 0.01" NA
Sep 26 49° 72° 38° (1970) 89° (2003) 0.02" NA
Sep 27 48° 72° 38° (1970) 88° (1994) 0.02" NA
Sep 28 48° 72° 40° (1972) 93° (1976) 0.02" NA
Sep 29 48° 71° 36° (1983) 85° (1966) 0.02" NA
Sep 30 48° 71° 34° (1983) 88° (1963) 0.02" NA
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