Walla Walla, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -2° -27.8° (1957) 21.1° (1968) 2.25" 5.8"
February -26.7° (1950) 23.9° (1995) 1.97" 3.9"
March 13° -15.6° (1993) 26.1° (1964) 2.2" 1.1"
April 18° -6.7° (1966) 35.6° (1977) 1.83" 0"
May 22° -3.3° (1954) 37.8° (1983) 1.95" 0"
June 12° 27° 2.2° (1966) 41.7° (1992) 1.15" 0"
July 16° 32° 4.4° (1971) 45.6° (1975) 0.73" 0"
August 16° 32° 5.6° (1992) 45.6° (1961) 0.84" 0"
September 12° 26° 0° (1985) 40° (1950) 0.83" 0"
October 19° -7.2° (1971) 31.7° (1958) 1.77" 0.3"
November 10° -23.9° (1985) 26.7° (1975) 2.85" 2.4"
December -2° -31.1° (1968) 20° (1980) 2.51" 6.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 6.7° 20° -3° (1954) 27° (1976) 0.06" NA
May 2 7.2° 20° 0° (1954) 28° (1966) 0.06" NA
May 3 7.2° 20.6° 2° (1950) 32° (1966) 0.06" NA
May 4 7.2° 20.6° 1° (1962) 34° (1966) 0.06" NA
May 5 7.2° 20.6° 1° (1965) 35° (1966) 0.07" NA
May 6 7.2° 20.6° 2° (2001) 34° (1992) 0.07" NA
May 7 7.8° 21.1° 3° (2000) 33° (1987) 0.07" NA
May 8 7.8° 21.1° 3° (1999) 34° (1987) 0.07" NA
May 9 7.8° 21.1° 2° (1999) 32° (1994) 0.07" NA
May 10 7.8° 21.7° 1° (1999) 32° (1951) 0.07" NA
May 11 8.3° 21.7° 2° (1985) 33° (1988) 0.07" NA
May 12 8.3° 21.7° 3° (1985) 35° (1988) 0.07" NA
May 13 8.3° 21.7° 3° (1955) 33° (1959) 0.07" NA
May 14 8.3° 22.2° 2° (1955) 37° (1973) 0.07" NA
May 15 8.3° 22.2° 3° (1974) 34° (1973) 0.07" NA
May 16 8.9° 22.2° 2° (1974) 32° (1973) 0.06" NA
May 17 8.9° 22.2° 3° (1971) 33° (1985) 0.06" NA
May 18 8.9° 22.8° 3° (1971) 33° (1954) 0.06" NA
May 19 8.9° 22.8° 4° (1976) 31° (1956) 0.06" NA
May 20 8.9° 22.8° 2° (1987) 32° (1958) 0.06" NA
May 21 9.4° 22.8° 2° (1971) 32° (1958) 0.06" NA
May 22 9.4° 23.3° 2° (1960) 35° (1979) 0.06" NA
May 23 9.4° 23.3° 3° (1950) 35° (2001) 0.06" NA
May 24 9.4° 23.3° 4° (1950) 34° (1992) 0.06" NA
May 25 10° 23.3° 3° (1978) 35° (1966) 0.06" NA
May 26 10° 23.3° 3° (1967) 34° (1958) 0.06" NA
May 27 10° 23.9° 4° (1955) 34° (1983) 0.06" NA
May 28 10° 23.9° 5° (1954) 38° (1983) 0.06" NA
May 29 10° 23.9° 3° (1951) 37° (1983) 0.06" NA
May 30 10.6° 23.9° 4° (1950) 35° (1986) 0.05" NA
May 31 10.6° 24.4° 4° (1966) 37° (1986) 0.05" NA
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