Ahtanum, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 21° 38° -21° (1950) 68° (1977) 1.17" 7"
February 25° 46° -25° (1950) 69° (1947) 0.8" 3.3"
March 29° 56° -1° (1960) 80° (1960) 0.7" 1.3"
April 33° 64° 20° (2007) 92° (1977) 0.53" 0"
May 40° 72° 25° (1999) 102° (1986) 0.51" 0"
June 46° 80° 30° (1984) 105° (1992) 0.62" 0"
July 51° 87° 34° (1971) 109° (2006) 0.22" 0"
August 50° 86° 35° (1960) 110° (1971) 0.36" 0"
September 42° 78° 24° (1985) 100° (1988) 0.39" 0"
October 33° 64° 4° (2002) 88° (1992) 0.53" 0.2"
November 26° 48° -13° (1985) 73° (1989) 1.05" 3.3"
December 20° 37° -17° (1964) 67° (1980) 1.38" 9.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 47° 83° 36° (2000) 100° (1949) 0.02" NA
Sep 2 46° 83° 39° (1948) 98° (1998) 0.02" NA
Sep 3 46° 82° 35° (2000) 100° (1988) 0.02" NA
Sep 4 46° 82° 35° (1996) 98° (1988) 0.02" NA
Sep 5 46° 81° 35° (1996) 97° (2006) 0.02" NA
Sep 6 45° 81° 36° (1960) 97° (2006) 0.02" NA
Sep 7 45° 81° 33° (1992) 93° (1958) 0.02" NA
Sep 8 45° 80° 35° (2002) 94° (1981) 0.02" NA
Sep 9 44° 80° 34° (1964) 93° (1981) 0.02" NA
Sep 10 44° 80° 36° (1989) 94° (1948) 0.01" NA
Sep 11 44° 79° 35° (1964) 96° (1973) 0.01" NA
Sep 12 43° 79° 34° (1964) 92° (1960) 0.01" NA
Sep 13 43° 79° 28° (1970) 94° (1948) 0.01" NA
Sep 14 43° 78° 34° (2006) 92° (2001) 0.01" NA
Sep 15 42° 78° 33° (1993) 92° (1981) 0.01" NA
Sep 16 42° 78° 33° (2006) 94° (1981) 0.01" NA
Sep 17 42° 77° 30° (1965) 95° (1981) 0.01" NA
Sep 18 42° 77° 30° (1988) 92° (1952) 0.01" NA
Sep 19 41° 76° 31° (1971) 90° (1967) 0.01" NA
Sep 20 41° 76° 30° (1993) 90° (1994) 0.01" NA
Sep 21 41° 76° 31° (1971) 89° (1967) 0.01" NA
Sep 22 40° 75° 30° (2000) 91° (1966) 0.01" NA
Sep 23 40° 75° 25° (2000) 90° (1952) 0.01" NA
Sep 24 40° 74° 27° (2000) 92° (1952) 0.01" NA
Sep 25 39° 74° 27° (1972) 93° (1952) 0.01" NA
Sep 26 39° 74° 26° (1972) 90° (1952) 0.01" NA
Sep 27 39° 73° 26° (1972) 91° (1963) 0.01" NA
Sep 28 38° 73° 28° (1999) 91° (1963) 0.01" NA
Sep 29 38° 72° 24° (1985) 86° (1996) 0.01" NA
Sep 30 38° 72° 26° (1985) 85° (1993) 0.01" NA
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