Heppner, Oregon
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 25° 42° -18° (1930) 70° (1968) 1.42" 5.7"
February 29° 47° -18° (1950) 75° (1995) 1.23" 1.9"
March 33° 54° 9° (1955) 80° (2003) 1.6" 0.7"
April 37° 61° 19° (1936) 89° (1939) 1.4" 0.2"
May 43° 69° 25° (1954) 98° (1986) 1.67" 0"
June 49° 78° 31° (2002) 105° (1961) 1.09" 0"
July 53° 86° 35° (1993) 108° (1928) 0.35" 0"
August 53° 86° 36° (1964) 108° (1998) 0.54" 0"
September 46° 77° 25° (1970) 99° (1955) 0.68" 0"
October 38° 65° 10° (1935) 92° (1980) 1.12" 0.1"
November 31° 50° -9° (1985) 79° (1999) 1.77" 2.3"
December 26° 42° -15° (1990) 75° (1939) 1.33" 4.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 40° 65° 25° (1954) 84° (1998) 0.05" NA
May 2 40° 66° 27° (1965) 89° (1947) 0.05" NA
May 3 40° 66° 29° (1928) 83° (1937) 0.05" NA
May 4 41° 66° 28° (1962) 88° (1966) 0.05" NA
May 5 41° 67° 28° (1937) 89° (1966) 0.05" NA
May 6 41° 67° 29° (1965) 91° (1966) 0.05" NA
May 7 41° 67° 28° (1930) 95° (1992) 0.05" NA
May 8 41° 67° 29° (2002) 91° (1987) 0.05" NA
May 9 42° 68° 31° (1996) 92° (1987) 0.05" NA
May 10 42° 68° 29° (1999) 88° (1987) 0.06" NA
May 11 42° 68° 28° (1985) 88° (1993) 0.06" NA
May 12 42° 68° 28° (1943) 91° (1931) 0.06" NA
May 13 42° 69° 31° (1956) 93° (1988) 0.06" NA
May 14 43° 69° 28° (1964) 91° (1973) 0.06" NA
May 15 43° 69° 30° (1943) 92° (1973) 0.06" NA
May 16 43° 69° 32° (1974) 88° (1973) 0.06" NA
May 17 43° 70° 32° (1943) 92° (2006) 0.06" NA
May 18 43° 70° 32° (1989) 95° (2006) 0.06" NA
May 19 44° 70° 30° (1987) 93° (2006) 0.06" NA
May 20 44° 71° 33° (1944) 89° (2006) 0.06" NA
May 21 44° 71° 32° (1973) 92° (1928) 0.06" NA
May 22 44° 71° 31° (1960) 88° (1979) 0.05" NA
May 23 44° 71° 29° (1964) 92° (2001) 0.05" NA
May 24 45° 71° 33° (1950) 97° (2001) 0.05" NA
May 25 45° 72° 30° (1964) 91° (1999) 0.05" NA
May 26 45° 72° 31° (1929) 90° (1947) 0.05" NA
May 27 45° 72° 33° (1940) 93° (1947) 0.05" NA
May 28 45° 72° 31° (1954) 94° (1983) 0.05" NA
May 29 46° 73° 30° (1951) 93° (1983) 0.05" NA
May 30 46° 73° 32° (1951) 96° (1983) 0.05" NA
May 31 46° 73° 34° (1955) 98° (1986) 0.05" NA
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