Riley, Oregon
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 14° 36° -30° (1962) 58° (1971) 0.72" 9.4"
February 20° 42° -32° (1989) 62° (1986) 0.64" 4.5"
March 26° 50° -3° (1979) 76° (1966) 0.91" 4.3"
April 30° 58° 3° (1975) 83° (1977) 0.7" 1.7"
May 35° 66° 12° (1964) 92° (1986) 1.15" 0.7"
June 41° 75° 22° (1976) 95° (1990) 0.59" 0.1"
July 45° 84° 26° (1986) 97° (1980) 0.38" 0"
August 44° 84° 23° (1965) 105° (1967) 0.53" 0"
September 36° 75° 11° (1970) 95° (1988) 0.57" 0"
October 29° 63° 5° (1985) 88° (1988) 0.64" 0.9"
November 22° 45° -16° (1985) 69° (1976) 1.23" 6.2"
December 15° 36° -31° (1972) 60° (1972) 0.88" 11.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 18° 39° 3° (1984) 60° (1972) 0.04" NA
Dec 2 18° 38° 2° (1984) 58° (1975) 0.04" NA
Dec 3 17° 38° 3° (1971) 53° (1975) 0.04" NA
Dec 4 17° 38° 2° (1972) 53° (1978) 0.04" NA
Dec 5 17° 38° -16° (1972) 49° (1965) 0.03" NA
Dec 6 17° 37° 2° (1984) 52° (1965) 0.03" NA
Dec 7 16° 37° -8° (1972) 53° (1976) 0.03" NA
Dec 8 16° 37° -20° (1972) 53° (1975) 0.03" NA
Dec 9 16° 37° -31° (1972) 59° (1981) 0.03" NA
Dec 10 16° 37° -30° (1972) 50° (1975) 0.03" NA
Dec 11 15° 36° -26° (1972) 46° (1974) 0.03" NA
Dec 12 15° 36° -13° (1985) 45° (1966) 0.03" NA
Dec 13 15° 36° -15° (1972) 51° (1977) 0.03" NA
Dec 14 15° 36° -15° (1972) 53° (1977) 0.03" NA
Dec 15 15° 36° -21° (1972) 51° (1979) 0.03" NA
Dec 16 14° 36° -2° (1967) 48° (1973) 0.03" NA
Dec 17 14° 35° -12° (1964) 52° (1979) 0.03" NA
Dec 18 14° 35° -5° (1970) 50° (1979) 0.03" NA
Dec 19 14° 35° -21° (1984) 50° (1989) 0.03" NA
Dec 20 14° 35° -20° (1984) 48° (1974) 0.03" NA
Dec 21 14° 35° -10° (1985) 53° (1972) 0.03" NA
Dec 22 14° 35° -16° (1983) 50° (1972) 0.03" NA
Dec 23 14° 35° -27° (1983) 50° (1989) 0.02" NA
Dec 24 13° 35° -11° (1970) 47° (1964) 0.02" NA
Dec 25 13° 35° -8° (1982) 54° (1980) 0.02" NA
Dec 26 13° 35° -11° (1985) 55° (1976) 0.02" NA
Dec 27 13° 35° -13° (1988) 55° (1967) 0.02" NA
Dec 28 13° 35° -16° (1983) 48° (1967) 0.02" NA
Dec 29 13° 35° -10° (1982) 53° (1962) 0.02" NA
Dec 30 13° 35° -15° (1978) 48° (1989) 0.02" NA
Dec 31 13° 34° -12° (1981) 45° (1962) 0.02" NA
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