Sisters, Oregon
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 23° 41° -28° (1962) 65° (1971) 1.89" NA
February 23° 44° -22° (1989) 72° (1995) 1.35" NA
March 27° 52° -1° (1996) 78° (1966) 0.98" NA
April 30° 58° 9° (1968) 87° (1987) 0.95" NA
May 35° 66° 11° (1975) 98° (1986) 1.21" NA
June 40° 75° 20° (1976) 103° (1976) 0.86" NA
July 43° 85° 24° (1977) 109° (1976) 0.53" NA
August 43° 85° 25° (1992) 106° (1972) 0.44" NA
September 36° 76° 15° (1985) 103° (1998) 0.48" NA
October 30° 63° -4° (2002) 92° (1980) 1.05" NA
November 27° 47° -16° (1993) 73° (1988) 1.86" NA
December 21° 39° -28° (1990) 64° (1980) 1.97" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 40° 80° 23° (1973) 94° (1987) 0.02" NA
Sep 2 40° 80° 25° (1973) 103° (1998) 0.01" NA
Sep 3 40° 80° 19° (1980) 96° (1998) 0.02" NA
Sep 4 40° 80° 26° (1980) 101° (1998) 0.01" NA
Sep 5 39° 79° 28° (1965) 95° (1998) 0.01" NA
Sep 6 39° 79° 26° (1961) 98° (2003) 0.02" NA
Sep 7 39° 79° 24° (1976) 95° (1958) 0.01" NA
Sep 8 39° 78° 24° (1976) 93° (1963) 0.01" NA
Sep 9 38° 78° 21° (1977) 97° (1981) 0.02" NA
Sep 10 38° 78° 21° (1984) 96° (1993) 0.01" NA
Sep 11 38° 78° 26° (1964) 95° (1990) 0.01" NA
Sep 12 37° 77° 22° (1984) 90° (1959) 0.02" NA
Sep 13 37° 77° 17° (1970) 93° (1995) 0.01" NA
Sep 14 37° 77° 18° (1970) 91° (2000) 0.02" NA
Sep 15 37° 76° 21° (1970) 93° (1998) 0.02" NA
Sep 16 36° 76° 22° (1987) 96° (1995) 0.01" NA
Sep 17 36° 76° 16° (1965) 93° (1984) 0.02" NA
Sep 18 36° 75° 17° (1965) 94° (1984) 0.02" NA
Sep 19 35° 75° 22° (1965) 91° (2000) 0.01" NA
Sep 20 35° 75° 22° (1982) 90° (1967) 0.02" NA
Sep 21 35° 74° 19° (1983) 93° (1967) 0.02" NA
Sep 22 35° 74° 21° (1977) 90° (1999) 0.01" NA
Sep 23 34° 73° 18° (2000) 93° (1992) 0.02" NA
Sep 24 34° 73° 17° (1970) 92° (1987) 0.02" NA
Sep 25 34° 73° 19° (1970) 93° (1994) 0.02" NA
Sep 26 34° 72° 21° (1977) 93° (1994) 0.01" NA
Sep 27 33° 72° 22° (1974) 94° (1963) 0.02" NA
Sep 28 33° 71° 20° (1985) 91° (1967) 0.02" NA
Sep 29 33° 71° 16° (1983) 91° (1996) 0.02" NA
Sep 30 33° 70° 15° (1985) 90° (1993) 0.02" NA
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