Richland, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 26° 40° -21° (1950) 71° (1971) 0.97" 2"
February 29° 47° -22° (1950) 73° (1986) 0.75" 1.9"
March 35° 57° 11° (1993) 82° (1960) 0.71" 0.3"
April 40° 65° 23° (1972) 92° (1977) 0.57" 0"
May 47° 73° 30° (1954) 104° (1986) 0.61" 0"
June 54° 80° 38° (1984) 110° (1958) 0.41" 0"
July 58° 88° 41° (1948) 110° (1968) 0.25" 0"
August 58° 88° 39° (1973) 113° (1961) 0.3" 0"
September 50° 79° 31° (1984) 106° (1950) 0.34" 0"
October 40° 65° 13° (2002) 89° (1958) 0.53" 0"
November 33° 49° -6° (1985) 77° (1975) 1.07" 1"
December 27° 40° -10° (1968) 66° (1993) 1.04" 3.3"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 30° 43° 4° (1985) 64° (1951) 0.04" NA
Dec 2 29° 43° 6° (1985) 65° (1972) 0.04" NA
Dec 3 29° 42° 15° (1976) 66° (1958) 0.04" NA
Dec 4 29° 42° 13° (1972) 65° (1975) 0.04" NA
Dec 5 29° 42° 11° (1972) 59° (1966) 0.04" NA
Dec 6 28° 41° 13° (1956) 59° (1981) 0.04" NA
Dec 7 28° 41° 11° (1956) 63° (1970) 0.04" NA
Dec 8 28° 41° -4° (1972) 60° (1957) 0.04" NA
Dec 9 28° 41° -2° (1972) 61° (1976) 0.04" NA
Dec 10 28° 40° -1° (1972) 66° (1993) 0.04" NA
Dec 11 28° 40° -5° (1972) 65° (1993) 0.04" NA
Dec 12 27° 40° -4° (1972) 64° (1955) 0.03" NA
Dec 13 27° 40° -3° (1972) 60° (1995) 0.03" NA
Dec 14 27° 40° 0° (1972) 61° (2002) 0.03" NA
Dec 15 27° 40° 7° (1972) 65° (1959) 0.03" NA
Dec 16 27° 39° -3° (1964) 65° (1959) 0.03" NA
Dec 17 27° 39° -6° (1964) 61° (1999) 0.03" NA
Dec 18 26° 39° 0° (1964) 58° (1966) 0.03" NA
Dec 19 26° 39° 4° (1984) 58° (1966) 0.03" NA
Dec 20 26° 39° 6° (1990) 58° (1956) 0.03" NA
Dec 21 26° 39° -6° (1990) 64° (1994) 0.03" NA
Dec 22 26° 39° -5° (1990) 64° (1994) 0.03" NA
Dec 23 26° 39° -4° (1983) 60° (1950) 0.03" NA
Dec 24 26° 39° -3° (1983) 64° (1950) 0.03" NA
Dec 25 26° 39° 0° (1983) 56° (1950) 0.03" NA
Dec 26 26° 38° 0° (1983) 63° (1980) 0.03" NA
Dec 27 26° 38° 2° (1948) 65° (1980) 0.03" NA
Dec 28 26° 38° 2° (1996) 63° (1967) 0.03" NA
Dec 29 26° 38° -5° (1990) 59° (1980) 0.03" NA
Dec 30 26° 38° -10° (1968) 62° (1949) 0.03" NA
Dec 31 26° 38° -2° (1968) 56° (1961) 0.03" NA
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