WHITE SWAN, WASHINGTON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(459191)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 198107
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
1927 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 37.80 k 31.43 18.17 b 24.80
1928 22.58 25.48 32.06 35.07 41.10 46.43 53.10 48.00 42.67 37.16 28.53 22.00 36.18
1929 8.77 9.25 30.97 31.50 37.32 47.23 49.29 48.84 41.00 35.23 20.13 23.26 31.90
1930 -0.52 28.96 33.26 35.57 38.97 b 42.76 a 47.13 a 49.32 42.20 27.87 ----- z ----- z 34.55
1931 ----- z ----- z 32.38 w 35.47 42.71 48.00 a 49.89 d 51.42 e 50.31 d 35.12 o ----- z ----- z 46.30
1932 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 50.42 s 44.52 a 38.03 a 34.89 k 17.74 33.43
1933 24.45 ----- z 31.26 33.83 a 39.89 m 44.67 48.42 48.97 41.73 37.82 c 31.96 b 34.65 37.78
1934 33.26 32.22 e 33.55 b 42.97 46.03 46.50 49.35 49.73 a 42.50 42.87 a 37.50 30.52 40.58
1935 24.19 27.86 29.39 35.20 38.42 46.83 52.06 47.87 46.75 n 34.68 24.93 a 26.65 35.28
1936 28.71 14.79 29.33 y 38.59 a 45.67 a 51.30 50.13 48.80 a 43.00 b 36.39 c 20.92 e 25.71 36.73
1937 3.16 17.64 34.65 37.21 a 42.07 a 49.90 53.15 d 48.74 45.72 a 44.90 u 35.03 29.39 36.06
1938 27.42 27.19 a 32.19 38.33 41.32 c 50.47 55.67 a 48.10 a 50.00 ----- z 24.50 25.52 38.25
1939 26.55 24.57 31.37 a 37.30 42.77 45.39 b 52.00 a 49.61 45.63 40.55 i 24.26 k 29.94 38.51
1940 23.46 c 29.00 a 36.00 38.77 44.29 47.21 a 53.03 b 51.33 a 49.72 a 46.50 u 26.07 26.03 38.63
1941 27.61 28.41 a 33.55 38.13 43.87 48.80 55.17 a 54.17 a 46.33 f ----- z 31.27 28.77 38.97
1942 18.29 28.50 31.55 b 43.23 45.19 49.27 53.30 a 53.42 45.63 38.56 f 30.67 22.29 38.30
1943 13.42 28.64 30.13 39.47 39.29 46.13 50.03 47.97 45.90 39.00 a 32.56 c 24.13 36.39
1944 19.65 27.34 27.87 36.48 a 42.58 49.00 52.71 50.61 48.20 41.81 ----- z 24.14 c 38.22
1945 29.10 29.25 32.07 a 35.57 ----- z 65.00 z 57.89 c 58.67 d 49.03 41.30 h 31.81 d 25.38 j 40.42
1946 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1947 27.45 t 27.57 33.20 a 39.17 46.90 a 49.21 a 53.39 48.42 49.87 o 40.90 29.97 26.21 b 39.49
1948 ----- z ----- z ----- z ----- z ----- z 51.27 49.04 c 48.97 b 41.82 b 32.76 b 26.53 m 15.09 h 44.77
1949 1.87 23.04 e 31.19 d 36.50 42.71 c 43.00 a 48.40 a 49.57 c 45.69 q 28.68 l 32.17 23.00 r 34.27
1950 1.39 c 20.39 31.03 34.07 39.13 a 50.57 51.50 a 52.71 44.47 38.48 29.77 31.00 d 35.38
1951 24.16 27.14 27.74 h 33.27 41.32 46.83 48.16 46.81 e 50.44 u ----- z ----- z 18.83 m 38.24
1952 14.48 27.24 30.74 36.30 43.48 49.50 51.97 a 52.45 47.03 a 41.62 j 25.41 m 27.17 m 39.24
1953 34.77 29.93 31.42 36.50 41.39 45.57 50.23 a 52.71 44.31 a 38.77 32.92 e ----- z 39.87
1954 21.13 a 29.18 27.69 b 35.38 a 42.61 47.28 a 49.61 49.65 45.73 35.26 35.18 h 26.20 u 38.35
1955 24.39 24.74 a 26.10 32.73 38.45 44.90 48.97 44.19 ----- z 37.54 r 23.87 19.57 a 32.79
1956 21.48 16.38 31.33 a 35.83 44.39 46.24 a 52.10 a 48.17 a 44.25 b 35.17 a 23.07 a 9.25 z 36.22
1957 4.33 d 24.00 33.29 n 38.00 a 46.13 47.40 47.52 b 43.68 c 43.89 c 32.04 f 22.20 t 27.60 a 35.84
1958 28.37 a 35.68 30.07 a 35.24 a 45.58 ----- z 58.93 q 52.03 b 44.41 a 34.58 22.45 h 27.85 e 37.09
1959 23.52 27.19 a 32.53 a 34.46 b 37.48 b 47.61 b 49.69 b 44.65 44.33 35.48 f 21.89 c 21.97 a 35.03
1960 12.48 26.00 b 27.97 a 34.97 a 40.80 a 46.48 a 51.77 49.00 43.41 a 36.59 b 29.13 21.00 o 36.24
1961 26.75 c 32.07 33.03 35.87 44.07 b 49.57 b 53.27 a 54.29 40.24 a 32.36 c 24.15 j 24.00 38.68
1962 20.29 26.07 27.83 b 37.93 39.57 a 42.82 b 47.23 a 49.33 a 45.38 a 36.17 b ----- z 30.24 b 36.62
1963 15.38 b 26.14 31.07 c 36.14 a 40.79 b 46.57 b 48.78 d 50.87 a 48.75 b 38.30 a 31.77 22.25 w 37.69
1964 26.42 e 23.03 28.48 b 31.59 a 37.53 a 45.52 c 47.97 b 47.17 b 40.47 32.96 c 28.62 v 13.85 e 34.09
1965 ----- z ----- z 24.27 t 36.50 b 37.13 45.75 b 50.60 a 52.13 a 38.63 ----- z ----- z ----- z 43.46
1966 ----- z ----- z ----- z ----- z 42.15 d 45.04 c 50.63 a 49.87 a 48.04 b 34.93 c 30.18 b 28.43 a 41.16
1967 29.38 g 28.36 30.69 b 33.83 40.97 50.17 a 49.65 50.14 b 49.87 38.93 b 27.71 b 20.93 b 38.30
1968 22.43 a 27.59 34.29 33.68 e 42.65 48.60 53.42 51.58 48.43 33.90 31.50 20.71 37.40
1969 10.70 a 21.50 30.87 a 36.93 a 43.90 a 53.52 a 51.65 n 47.55 47.13 34.42 29.47 29.20 a 35.02
1970 23.00 33.21 33.74 37.80 41.21 b 51.97 a 53.16 50.32 41.47 33.55 b 31.31 a 21.81 37.71
1971 27.42 27.57 29.90 37.42 d 46.11 m 45.53 52.81 51.88 f 39.63 33.42 28.67 c 23.23 34.56
1972 22.42 24.62 33.13 33.37 44.68 49.27 52.29 c 51.82 c 42.03 33.00 a 32.52 e 16.54 c 36.31
1973 21.47 a 29.00 a 33.48 36.00 43.19 50.10 53.55 49.30 a 46.83 36.52 29.47 29.23 38.18
1974 17.29 29.39 32.45 39.10 41.48 49.50 53.00 52.74 46.60 35.06 32.87 28.52 38.17
1975 23.87 23.96 29.77 33.47 42.42 48.37 56.65 51.00 a 44.67 38.71 29.07 25.58 37.29
1976 25.00 27.34 28.94 36.43 41.94 44.76 a 52.55 i 50.74 h 49.53 34.48 27.53 20.13 33.61
1977 16.81 28.21 33.03 39.79 b 40.77 52.83 54.74 d 51.12 w 44.10 36.45 28.57 28.32 36.69
1978 28.29 31.46 b 36.48 40.60 42.77 51.87 55.19 54.03 48.88 d 35.13 23.16 e ----- z 40.72
1979 6.61 25.23 o 33.45 38.77 44.81 50.27 55.36 c 55.23 50.90 42.16 28.33 28.48 39.49
1980 12.77 25.17 32.19 40.20 j 46.67 a 50.52 a 53.84 49.85 d 47.77 35.90 k 31.82 m 26.14 q 39.85
1981 32.00 p ----- z 34.43 j 37.19 n ----- z 50.58 d 54.45 b ----- z ----- z ----- z ----- z ----- z 52.51
Period of Record Statistics
MEAN 19.76 26.27 31.50 36.46 42.14 47.98 51.66 50.12 45.23 36.22 28.98 25.06 36.86
S.D. 8.79 4.82 2.24 2.54 2.59 2.61 2.63 2.81 3.18 3.09 3.97 4.58 2.15
SKEW -0.76 -1.33 -0.18 0.44 -0.17 -0.03 0.15 0.29 -0.06 0.06 -0.48 -0.38 -0.73
MAX 34.77 35.68 36.48 43.23 46.90 53.52 57.89 58.67 50.90 42.87 37.50 34.65 40.58
MIN -0.52 9.25 26.10 31.50 37.13 42.76 47.13 43.68 38.63 27.87 20.13 13.85 31.90
NO YRS 45 45 44 48 47 50 49 48 46 36 37 38 11