WALLA WALLA 13 ESE, OREGON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(358985)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 199011
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1948 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 44.16 37.87 31.19 27.17 a 17.00 a 31.48
1949 4.24 b 20.25 27.06 31.48 a 38.03 a 38.53 41.97 41.24 b 38.10 a 28.55 30.03 23.32 30.24
1950 5.58 20.54 25.55 ----- z 31.52 41.59 a 45.74 44.90 38.90 38.06 30.57 31.33 a 32.21
1951 23.35 25.96 29.29 33.80 38.65 42.10 a 45.35 43.87 40.03 36.32 29.50 21.97 34.18
1952 20.74 26.55 28.97 34.14 a 40.42 44.50 45.23 a 44.52 41.87 35.35 23.77 26.97 34.42
1953 34.06 27.61 30.10 34.03 a 37.00 41.23 43.68 46.19 40.97 35.10 33.20 29.23 36.03
1954 23.81 27.39 25.52 33.50 39.61 41.40 47.68 43.90 40.97 34.26 34.40 25.61 34.84
1955 25.13 a 24.69 b 24.13 31.13 36.27 a 43.07 a 46.73 a 41.70 a 39.10 36.83 a 24.63 23.90 33.11
1956 26.00 20.07 27.61 33.53 41.00 42.13 47.16 45.84 41.10 a 36.35 30.13 27.03 34.83
1957 11.07 a 25.57 30.87 34.30 42.81 45.70 45.87 42.87 40.83 36.39 28.10 30.32 34.56
1958 27.68 34.79 29.00 34.40 42.29 47.63 48.13 47.90 41.57 35.55 29.73 o 30.29 38.11
1959 25.90 27.50 31.13 34.13 36.55 44.07 45.77 44.03 43.13 36.90 26.17 26.19 35.12
1960 20.03 26.31 28.52 35.17 37.90 42.60 46.90 45.06 41.03 36.61 31.07 23.71 34.58
1961 26.26 33.57 31.97 34.53 39.23 45.50 46.61 48.74 38.30 34.68 26.87 26.32 36.05
1962 22.65 26.89 29.06 35.47 38.68 40.83 44.03 45.61 41.07 36.32 33.63 29.29 35.29
1963 17.13 30.36 30.87 33.60 39.20 a 44.00 44.42 45.84 45.00 38.87 33.33 25.94 35.71
1964 28.35 25.69 29.13 32.33 36.53 a 44.17 46.32 44.10 40.07 35.84 30.60 23.00 34.68
1965 27.52 28.36 25.71 35.03 37.16 42.90 47.45 49.23 38.50 38.87 34.53 25.71 35.91
1966 27.06 26.57 28.71 32.87 39.00 42.53 45.10 45.45 44.60 36.16 33.47 31.19 36.06
1967 31.03 29.00 29.71 31.07 37.84 45.27 46.45 48.40 a 45.52 c 38.53 a 30.70 25.80 a 36.61
1968 26.42 31.82 a 33.23 32.45 a 39.10 44.67 47.83 a 47.32 43.03 35.61 32.24 a 23.77 36.46
1969 14.50 a 26.54 27.47 a 34.04 b 40.50 a 48.03 46.06 45.28 b 43.90 34.14 b 29.50 b 27.07 a 34.75
1970 25.03 30.59 a 29.90 30.46 b 37.58 47.59 a 49.20 a 44.52 b 39.14 b 35.50 a 31.63 26.74 35.66
1971 28.10 28.46 27.58 32.93 38.94 43.30 47.14 c 48.76 b 38.77 32.73 a 31.67 25.71 35.34
1972 23.23 26.59 32.94 32.18 b 39.10 45.47 43.04 e 47.84 39.37 34.27 a 32.30 19.61 34.66
1973 22.58 27.54 31.16 31.79 a 39.31 b 43.72 e 45.62 e 45.26 42.90 36.19 30.80 30.71 35.63
1974 18.39 30.07 30.06 34.97 37.55 45.00 47.00 46.16 39.74 k 34.03 a 33.70 28.52 35.04
1975 25.74 25.30 a 28.40 a 30.83 36.37 a 43.07 a 47.75 z 45.83 b 40.30 39.00 30.07 28.50 o 34.49
1976 ----- z 31.50 q ----- z ----- z ----- z ----- z 49.47 p 49.40 f 44.48 c ----- z 32.93 b 26.45 34.62
1977 18.90 28.64 30.45 35.20 38.43 c 47.20 45.42 49.06 42.27 ----- z ----- z 26.70 d 36.23
1978 27.84 29.84 i 31.57 a 35.41 a 38.58 ----- z ----- z ----- z ----- z ----- z 22.84 e ----- z 31.25
1979 ----- z ----- z ----- z ----- z 39.65 43.97 47.70 a 46.87 42.90 37.32 27.07 29.74 39.40
1980 19.13 28.55 29.74 36.57 39.29 45.86 a 47.26 41.48 41.67 33.71 30.40 26.94 o 35.79
1981 18.70 k 28.46 b 34.00 35.63 ----- z ----- z ----- z 47.39 c 40.90 36.13 33.47 29.06 35.63
1982 26.35 25.86 30.65 31.77 38.61 46.90 46.58 48.61 43.13 37.00 28.33 26.68 35.87
1983 30.58 32.68 34.71 33.27 38.84 44.33 47.29 50.16 40.47 36.55 b ----- z ----- z 38.89
1984 28.83 y 28.79 32.61 34.37 38.35 43.07 46.42 47.94 41.67 33.94 32.20 22.32 36.52
1985 18.00 22.21 27.06 34.30 39.35 43.03 48.23 45.16 39.30 35.32 18.87 15.07 a 32.16
1986 28.52 27.93 34.06 ----- z ----- z ----- z ----- z ----- z ----- z 34.90 31.00 24.58 30.17
1987 22.03 28.14 32.42 37.20 41.58 45.23 47.87 44.13 41.43 32.65 32.30 24.71 35.81
1988 21.05 i 27.07 30.35 35.73 39.16 45.00 46.97 44.87 41.27 40.03 33.23 25.42 37.19
1989 27.55 16.18 31.52 b 36.03 38.71 44.77 46.52 46.71 40.97 36.06 33.53 26.45 35.42
1990 29.81 24.82 30.39 37.40 39.65 45.13 49.71 48.97 43.57 36.19 33.70 ----- z 38.12
Period of Record Statistics
MEAN 23.25 27.02 29.83 33.87 38.67 44.08 46.39 45.90 41.25 35.70 30.34 25.88 34.96
S.D. 6.54 3.66 2.47 1.76 1.90 2.05 1.60 2.23 1.99 2.17 3.48 3.59 1.36
SKEW -1.23 -0.63 -0.17 -0.08 -0.99 -0.22 -0.61 -0.11 0.26 -0.80 -1.31 -0.95 -1.86
MAX 34.06 34.79 34.71 37.40 42.81 48.03 49.71 50.16 45.52 40.03 34.53 31.33 36.61
MIN 4.24 16.18 24.13 30.46 31.52 38.53 41.97 41.24 37.87 28.55 18.87 15.07 30.24
NO YRS 37 39 40 38 39 38 37 40 40 40 40 38 27