Walla Walla, Washington
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -1° -27.8° (1957) 21.1° (1968) 2.53" 1.9"
February -26.7° (1950) 23.9° (1995) 1.83" 3.1"
March 13° -15.6° (1993) 26.1° (1964) 2.3" 1"
April 17° -6.7° (1966) 35.6° (1977) 1.92" 0.1"
May 21° -3.3° (1954) 37.8° (1983) 2.13" 0"
June 12° 26° 2.2° (1966) 41.7° (1992) 1.28" 0"
July 16° 32° 4.4° (1971) 45.6° (1975) 0.59" 0"
August 16° 31° 5.6° (1992) 45.6° (1961) 0.57" 0"
September 11° 26° 0° (1985) 40° (1950) 0.75" 0"
October 18° -7.2° (1971) 31.7° (1958) 1.68" 0.1"
November -23.9° (1985) 26.7° (1975) 2.87" 1.2"
December -2° -31.1° (1968) 20° (1980) 2.47" 4.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 14° 29° 7° (1999) 37° (1987) 0.02" 0"
Sep 2 14° 28° 7° (1999) 40° (1950) 0.03" 0"
Sep 3 13° 28° 7° (1958) 36° (1993) 0.02" 0"
Sep 4 13° 28° 7° (1956) 37° (2006) 0.02" 0"
Sep 5 13° 28° 7° (1956) 37° (1955) 0.02" 0"
Sep 6 13° 28° 7° (1960) 39° (1955) 0.02" 0"
Sep 7 13° 27° 7° (1960) 37° (1958) 0.02" 0"
Sep 8 13° 27° 4° (1962) 39° (1981) 0.02" 0"
Sep 9 13° 27° 6° (1962) 36° (1963) 0.02" 0"
Sep 10 12° 27° 6° (1964) 37° (1990) 0.02" 0"
Sep 11 12° 27° 6° (1999) 36° (1953) 0.02" 0"
Sep 12 12° 26° 5° (1964) 34° (1953) 0.02" 0"
Sep 13 12° 26° 3° (1970) 33° (1959) 0.03" 0"
Sep 14 12° 26° 4° (1970) 34° (1953) 0.02" 0"
Sep 15 12° 26° 4° (1970) 37° (1979) 0.02" 0"
Sep 16 11° 26° 2° (1965) 36° (1981) 0.03" 0"
Sep 17 11° 25° 0° (1965) 36° (1981) 0.02" 0"
Sep 18 11° 25° 2° (1965) 36° (1981) 0.03" 0"
Sep 19 11° 25° 1° (1957) 33° (1994) 0.03" 0"
Sep 20 11° 25° 3° (1983) 33° (1967) 0.02" 0"
Sep 21 11° 24° 4° (1971) 34° (1967) 0.03" 0"
Sep 22 10° 24° 3° (1993) 32° (1999) 0.03" 0"
Sep 23 10° 24° 1° (2000) 32° (1952) 0.03" 0"
Sep 24 10° 24° 3° (2000) 35° (1952) 0.03" 0"
Sep 25 10° 23° 3° (1970) 37° (1952) 0.03" 0"
Sep 26 10° 23° 3° (1972) 33° (1952) 0.03" 0"
Sep 27 10° 23° 2° (1972) 32° (1967) 0.03" 0"
Sep 28 23° 1° (1985) 32° (1967) 0.03" 0"
Sep 29 22° 0° (1985) 32° (1976) 0.03" 0"
Sep 30 22° 2° (1950) 32° (1976) 0.03" 0"
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