Ontario, Oregon
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 18° 34° -25° (1962) 64° (1953) 1.29" NA
February 24° 43° -24° (1989) 66° (1963) 0.87" NA
March 31° 55° 10° (2002) 85° (1966) 0.86" NA
April 37° 65° 17° (1956) 94° (1977) 0.68" NA
May 45° 74° 25° (1975) 103° (1986) 0.93" NA
June 51° 84° 31° (1976) 108° (1970) 0.62" NA
July 57° 93° 34° (1986) 114° (2002) 0.3" NA
August 54° 91° 33° (1960) 113° (1961) 0.28" NA
September 45° 81° 24° (1985) 104° (1967) 0.47" NA
October 34° 66° 13° (2002) 94° (1997) 0.55" NA
November 27° 47° -6° (1993) 78° (2006) 1.19" NA
December 20° 36° -23° (1972) 66° (1955) 1.41" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 50° 87° 37° (1965) 104° (1967) 0.01" NA
Sep 2 49° 86° 37° (1975) 100° (1967) 0.01" NA
Sep 3 49° 86° 36° (1961) 101° (1998) 0.01" NA
Sep 4 49° 85° 34° (1980) 101° (1998) 0.01" NA
Sep 5 48° 85° 36° (1956) 100° (1966) 0.01" NA
Sep 6 48° 85° 34° (1992) 101° (1966) 0.01" NA
Sep 7 48° 84° 37° (1992) 99° (1967) 0.01" NA
Sep 8 47° 84° 35° (1971) 98° (1969) 0.01" NA
Sep 9 47° 83° 32° (1976) 98° (1958) 0.01" NA
Sep 10 46° 83° 32° (1983) 98° (1958) 0.02" NA
Sep 11 46° 82° 35° (1982) 99° (1959) 0.02" NA
Sep 12 46° 82° 35° (1949) 97° (1960) 0.02" NA
Sep 13 45° 82° 30° (1992) 95° (1981) 0.02" NA
Sep 14 45° 81° 30° (1970) 98° (2002) 0.02" NA
Sep 15 45° 81° 29° (1970) 95° (1956) 0.02" NA
Sep 16 44° 80° 30° (1970) 95° (1956) 0.02" NA
Sep 17 44° 80° 32° (1965) 95° (1956) 0.02" NA
Sep 18 44° 80° 25° (1965) 98° (2000) 0.02" NA
Sep 19 43° 79° 24° (1965) 95° (1952) 0.02" NA
Sep 20 43° 79° 27° (1978) 94° (1967) 0.02" NA
Sep 21 43° 78° 25° (1983) 97° (1966) 0.02" NA
Sep 22 42° 78° 27° (1995) 100° (1966) 0.02" NA
Sep 23 42° 77° 26° (1956) 95° (1966) 0.02" NA
Sep 24 41° 77° 28° (1956) 92° (1966) 0.02" NA
Sep 25 41° 77° 25° (1984) 92° (2001) 0.02" NA
Sep 26 41° 76° 26° (1972) 92° (1956) 0.02" NA
Sep 27 40° 76° 27° (1971) 94° (1957) 0.01" NA
Sep 28 40° 75° 28° (1971) 90° (1963) 0.01" NA
Sep 29 40° 75° 26° (1985) 95° (1963) 0.01" NA
Sep 30 39° 75° 24° (1985) 93° (1957) 0.01" NA
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