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
Sep 1 14.4° 29.4° 7° (1999) 37° (1987) 0.03" NA
Sep 2 13.9° 28.9° 7° (1999) 40° (1950) 0.03" NA
Sep 3 13.9° 28.9° 7° (1958) 36° (1993) 0.03" NA
Sep 4 13.9° 28.9° 7° (1956) 36° (1966) 0.02" NA
Sep 5 13.3° 28.3° 7° (1956) 37° (1955) 0.02" NA
Sep 6 13.3° 28.3° 7° (1960) 39° (1955) 0.02" NA
Sep 7 13.3° 28.3° 7° (1960) 37° (1958) 0.02" NA
Sep 8 12.8° 27.8° 4° (1962) 39° (1981) 0.02" NA
Sep 9 12.8° 27.8° 6° (1962) 36° (1963) 0.02" NA
Sep 10 12.8° 27.8° 6° (1964) 37° (1990) 0.02" NA
Sep 11 12.2° 27.2° 6° (1999) 36° (1953) 0.02" NA
Sep 12 12.2° 27.2° 5° (1964) 34° (1953) 0.02" NA
Sep 13 12.2° 26.7° 3° (1970) 33° (1959) 0.03" NA
Sep 14 11.7° 26.7° 4° (1970) 34° (1953) 0.03" NA
Sep 15 11.7° 26.7° 4° (1970) 37° (1979) 0.03" NA
Sep 16 11.7° 26.1° 2° (1965) 36° (1981) 0.03" NA
Sep 17 11.1° 26.1° 0° (1965) 36° (1981) 0.03" NA
Sep 18 11.1° 25.6° 2° (1965) 36° (1981) 0.03" NA
Sep 19 11.1° 25.6° 1° (1957) 33° (1994) 0.03" NA
Sep 20 10.6° 25.6° 3° (1983) 33° (1967) 0.03" NA
Sep 21 10.6° 25° 4° (1971) 34° (1967) 0.03" NA
Sep 22 10.6° 25° 3° (1993) 32° (1999) 0.03" NA
Sep 23 10° 24.4° 1° (2000) 32° (1952) 0.03" NA
Sep 24 10° 24.4° 3° (2000) 35° (1952) 0.03" NA
Sep 25 10° 24.4° 3° (1970) 37° (1952) 0.03" NA
Sep 26 10° 23.9° 3° (1972) 33° (1952) 0.03" NA
Sep 27 9.4° 23.9° 2° (1972) 32° (1967) 0.03" NA
Sep 28 9.4° 23.3° 1° (1985) 32° (1967) 0.03" NA
Sep 29 9.4° 23.3° 0° (1985) 32° (1976) 0.04" NA
Sep 30 8.9° 22.8° 2° (1950) 32° (1976) 0.04" NA
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