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
Dec 1 22° 40° 9° (1969) 59° (1995) 0.05" NA
Dec 2 22° 39° 9° (1976) 62° (1995) 0.05" NA
Dec 3 22° 39° 9° (1969) 60° (1977) 0.05" NA
Dec 4 22° 39° -4° (1992) 57° (1975) 0.05" NA
Dec 5 21° 38° -11° (1992) 60° (2007) 0.05" NA
Dec 6 21° 38° -5° (1992) 63° (1987) 0.05" NA
Dec 7 21° 38° 0° (1972) 54° (1987) 0.05" NA
Dec 8 21° 37° 1° (1972) 54° (1993) 0.05" NA
Dec 9 21° 37° -18° (1972) 52° (1993) 0.05" NA
Dec 10 20° 37° -23° (1972) 54° (1993) 0.05" NA
Dec 11 20° 36° -21° (1972) 49° (1956) 0.05" NA
Dec 12 20° 36° -4° (1985) 55° (1991) 0.05" NA
Dec 13 20° 36° -13° (1972) 65° (1995) 0.05" NA
Dec 14 20° 36° -13° (1972) 57° (2002) 0.05" NA
Dec 15 19° 36° -15° (1972) 58° (2002) 0.05" NA
Dec 16 19° 35° -5° (1985) 54° (2002) 0.05" NA
Dec 17 19° 35° -11° (1964) 54° (2002) 0.05" NA
Dec 18 19° 35° -4° (1985) 54° (1973) 0.04" NA
Dec 19 19° 35° -5° (1985) 48° (1960) 0.04" NA
Dec 20 19° 35° -7° (1990) 55° (1955) 0.04" NA
Dec 21 18° 34° -20° (1990) 59° (1957) 0.04" NA
Dec 22 18° 34° -20° (1990) 66° (1955) 0.04" NA
Dec 23 18° 34° -13° (1990) 59° (1955) 0.04" NA
Dec 24 18° 34° -14° (1990) 59° (1964) 0.04" NA
Dec 25 18° 34° -7° (1985) 51° (1964) 0.04" NA
Dec 26 18° 34° -8° (1985) 55° (1955) 0.04" NA
Dec 27 18° 34° -9° (1985) 53° (1955) 0.04" NA
Dec 28 18° 33° -8° (1985) 60° (1965) 0.04" NA
Dec 29 18° 33° -12° (1990) 55° (1965) 0.04" NA
Dec 30 18° 33° -12° (1985) 56° (1996) 0.04" NA
Dec 31 18° 33° -3° (1974) 53° (1996) 0.04" NA
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