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
May 1 41° 70° 29° (1972) 89° (1971) 0.03" NA
May 2 41° 70° 26° (1954) 91° (1966) 0.03" NA
May 3 41° 70° 27° (1959) 93° (1966) 0.03" NA
May 4 41° 71° 28° (1964) 98° (1966) 0.03" NA
May 5 42° 71° 29° (1986) 95° (1966) 0.03" NA
May 6 42° 71° 26° (1964) 94° (1966) 0.03" NA
May 7 42° 72° 28° (1984) 95° (1987) 0.03" NA
May 8 43° 72° 30° (2002) 92° (1992) 0.03" NA
May 9 43° 72° 26° (2002) 93° (1969) 0.03" NA
May 10 43° 73° 26° (1999) 91° (1960) 0.03" NA
May 11 43° 73° 26° (1999) 95° (1993) 0.03" NA
May 12 44° 73° 32° (1967) 96° (1988) 0.03" NA
May 13 44° 74° 30° (1974) 95° (1988) 0.03" NA
May 14 44° 74° 28° (1970) 94° (1972) 0.03" NA
May 15 44° 74° 28° (1966) 95° (1973) 0.03" NA
May 16 45° 74° 30° (1974) 97° (1973) 0.03" NA
May 17 45° 75° 29° (1974) 98° (1973) 0.03" NA
May 18 45° 75° 27° (1989) 96° (1973) 0.03" NA
May 19 45° 75° 31° (1960) 95° (1954) 0.03" NA
May 20 46° 76° 35° (1953) 93° (1958) 0.03" NA
May 21 46° 76° 30° (1974) 96° (1967) 0.03" NA
May 22 46° 76° 26° (1960) 95° (1956) 0.03" NA
May 23 46° 77° 27° (1966) 94° (1956) 0.03" NA
May 24 46° 77° 32° (1989) 94° (2001) 0.03" NA
May 25 47° 77° 25° (1975) 97° (2001) 0.03" NA
May 26 47° 77° 30° (1975) 102° (1966) 0.03" NA
May 27 47° 78° 33° (1953) 96° (1958) 0.03" NA
May 28 47° 78° 30° (1954) 97° (1983) 0.03" NA
May 29 48° 78° 35° (1959) 103° (1986) 0.03" NA
May 30 48° 78° 37° (1988) 102° (1972) 0.03" NA
May 31 48° 79° 36° (1974) 101° (1972) 0.03" NA
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