SEATTLE UNIV OF WASH,

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(457478)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 198307
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
1909 10.00 c 26.00 30.00 33.00 a 39.00 c 44.00 47.00 45.00 a 45.00 39.00 27.00 22.00 10.00
1910 18.00 22.00 30.00 27.00 b 41.00 45.00 46.00 43.00 44.00 g 32.00 28.00 31.00 18.00
1911 18.00 26.00 b 30.00 31.00 40.00 40.00 48.00 44.00 41.00 38.00 n 23.00 30.00 18.00
1912 25.00 30.00 30.00 37.00 45.00 46.00 52.00 50.00 46.00 41.00 36.00 34.00 25.00
1913 26.00 31.00 29.00 36.00 43.00 48.00 51.00 49.00 48.00 42.00 38.00 31.00 f 26.00
1914 33.00 31.00 24.00 d 32.00 a 42.00 b 40.00 d ----- z 51.00 46.00 43.00 39.00 a ----- z 24.00
1915 26.00 h 28.00 31.00 37.00 41.00 e 47.00 48.00 51.00 42.00 39.00 29.00 24.00 24.00
1916 15.00 25.00 28.00 34.00 35.00 44.00 45.00 45.00 40.00 33.00 24.00 23.00 15.00
1917 16.00 26.00 27.00 33.00 38.00 44.00 46.00 47.00 43.00 31.00 31.00 23.00 16.00
1918 18.00 22.00 22.00 28.00 ----- z 41.00 46.00 50.00 44.00 38.00 33.00 27.00 18.00
1919 22.00 28.00 34.00 36.00 37.00 ----- z ----- z ----- z 39.00 a 31.00 d 24.00 5.00 5.00
1920 11.00 a 16.00 20.00 21.00 31.00 36.00 g 43.00 41.00 43.00 ----- z 24.00 33.00 11.00
1921 28.00 g 24.00 30.00 32.00 36.00 45.00 46.00 48.00 36.00 34.00 29.00 18.00 18.00
1922 15.00 21.00 30.00 32.00 35.00 43.00 48.00 49.00 45.00 38.00 32.00 16.00 15.00
1923 20.00 b 15.00 27.00 36.00 38.00 42.00 49.00 51.00 45.00 b 35.00 a 36.00 19.00 15.00
1924 15.00 a 29.00 31.00 33.00 41.00 48.00 48.00 a 48.00 42.00 34.00 29.00 10.00 10.00
1925 29.00 32.00 32.00 37.00 40.00 44.00 50.00 46.00 43.00 37.00 32.00 30.00 29.00
1926 28.00 31.00 31.00 37.00 38.00 47.00 49.00 48.00 36.00 36.00 31.00 19.00 19.00
1927 17.00 29.00 31.00 29.00 39.00 46.00 49.00 48.00 46.00 38.00 33.00 15.00 15.00
1928 21.00 31.00 30.00 34.00 39.00 46.00 49.00 49.00 42.00 41.00 34.00 27.00 21.00
1929 14.00 15.00 32.00 32.00 b 39.00 43.00 48.00 d 49.00 30.00 38.00 b 30.00 31.00 14.00
1930 15.00 29.00 32.00 38.00 30.00 43.00 47.00 50.00 42.00 34.00 25.00 b 28.00 15.00
1931 31.00 32.00 31.00 ----- z ----- z 46.00 50.00 50.00 44.00 39.00 27.00 28.00 27.00
1932 21.00 a 18.00 30.00 37.00 39.00 40.00 46.00 48.00 41.00 39.00 32.00 15.00 15.00
1933 28.00 13.00 31.00 32.00 39.00 42.00 48.00 50.00 40.00 38.00 34.00 31.00 13.00
1934 31.00 30.00 36.00 34.00 41.00 46.00 47.00 50.00 41.00 39.00 39.00 31.00 30.00
1935 12.00 29.00 30.00 30.00 40.00 43.00 48.00 47.00 44.00 29.00 23.00 29.00 12.00
1936 28.00 17.00 27.00 30.00 42.00 50.00 51.00 51.00 43.00 41.00 28.00 28.00 17.00
1937 15.00 28.00 34.00 36.00 40.00 49.00 50.00 47.00 43.00 40.00 31.00 30.00 15.00
1938 30.00 29.00 31.00 33.00 39.00 45.00 48.00 49.00 50.00 35.00 29.00 27.00 27.00
1939 30.00 24.00 31.00 34.00 40.00 40.00 47.00 50.00 45.00 33.00 40.00 28.00 24.00
1940 26.00 32.00 35.00 35.00 35.00 46.00 49.00 51.00 45.00 39.00 27.00 26.00 26.00
1941 29.00 31.00 28.00 37.00 40.00 47.00 51.00 51.00 42.00 31.00 34.00 19.00 19.00
1942 22.00 28.00 32.00 37.00 39.00 45.00 54.00 51.00 44.00 38.00 a 31.00 31.00 a 22.00
1943 12.00 30.00 28.00 32.00 40.00 43.00 48.00 c 48.00 c 42.00 33.00 34.00 28.00 a 12.00
1944 27.00 30.00 30.00 37.00 36.00 41.00 47.00 d 48.00 a 42.00 42.00 31.00 22.00 22.00
1945 27.00 30.00 29.00 a 33.00 41.00 44.00 41.00 47.00 40.00 37.00 a 29.00 21.00 a 21.00
1946 30.00 30.00 31.00 a 35.00 40.00 a 46.00 a 48.00 b ----- z 43.00 j 35.00 b 29.00 g 22.00 22.00
1947 10.00 a ----- z 30.00 33.00 c 41.00 48.00 a 51.00 50.00 g ----- z ----- z 30.00 31.00 10.00
1948 25.00 23.00 29.00 32.00 37.00 48.00 48.00 50.00 39.00 35.00 29.00 22.00 22.00
1949 13.00 21.00 30.00 36.00 35.00 43.00 44.00 49.00 41.00 29.00 36.00 23.00 13.00
1950 6.00 8.00 29.00 31.00 35.00 44.00 49.00 47.00 40.00 38.00 29.00 32.00 a 6.00
1951 15.00 27.00 26.00 31.00 a 38.00 44.00 50.00 49.00 42.00 33.00 29.00 20.00 15.00
1952 18.00 29.00 29.00 30.00 34.00 41.00 f 45.00 a 48.00 44.00 38.00 25.00 27.00 a 18.00
1953 30.00 31.00 30.00 32.00 40.00 41.00 48.00 50.00 45.00 37.00 34.00 32.00 30.00
1954 22.00 30.00 23.00 a 37.00 37.00 e 42.00 45.00 49.00 45.00 34.00 35.00 31.00 22.00
1955 29.00 a 25.00 a 17.00 31.00 38.00 36.00 47.00 46.00 42.00 39.00 10.00 a 25.00 a 10.00
1956 18.00 a 15.00 25.00 31.00 39.00 44.00 48.00 51.00 47.00 34.00 d 30.00 18.00 15.00
1957 13.00 22.00 34.00 34.00 46.00 43.00 f ----- z ----- z 42.00 h 38.00 f 30.00 32.00 13.00
1958 40.00 z 33.00 31.00 a 39.00 40.00 a 52.00 a 53.00 a 53.00 b 45.00 e 38.00 c 25.00 g ----- z 25.00
1959 14.00 a 31.00 d 34.00 a 36.00 36.00 45.00 50.00 d 50.00 a 46.00 a 38.00 27.00 30.00 14.00
1960 26.00 28.00 25.00 37.00 40.00 46.00 48.00 46.00 42.00 40.00 c 32.00 28.00 o 25.00
1961 29.00 f 34.00 30.00 d ----- z 41.00 r 45.00 i 51.00 n 52.00 j 44.00 k 36.00 c 30.00 e 31.00 q 29.00
1962 16.00 d 21.00 26.00 k 36.00 b 37.00 43.00 i 45.00 f 48.00 j 43.00 i 42.00 b 33.00 c 28.00 a 16.00
1963 17.00 33.00 31.00 c 33.00 a 40.00 48.00 a 48.00 b 51.00 47.00 a 39.00 f 31.00 25.00 b 17.00
1964 ----- z ----- z 32.00 35.00 37.00 44.00 ----- z ----- z 46.00 39.00 30.00 i 10.00 10.00
1965 24.00 33.00 28.00 36.00 36.00 45.00 50.00 48.00 42.00 43.00 32.00 25.00 24.00
1966 29.00 30.00 29.00 a 36.00 41.00 47.00 51.00 50.00 48.00 41.00 33.00 33.00 29.00
1967 28.00 30.00 28.00 34.00 43.00 51.00 51.00 53.00 48.00 36.00 31.00 24.00 24.00
1968 25.00 29.00 33.00 32.00 35.00 48.00 52.00 53.00 45.00 40.00 34.00 8.00 8.00
1969 16.00 29.00 29.00 36.00 38.00 50.00 51.00 48.00 44.00 35.00 32.00 28.00 16.00
1970 24.00 33.00 31.00 36.00 39.00 46.00 52.00 51.00 40.00 b 31.00 25.00 25.00 24.00
1971 24.00 27.00 24.00 35.00 42.00 46.00 46.00 52.00 44.00 28.00 32.00 25.00 24.00
1972 12.00 21.00 31.00 33.00 37.00 46.00 45.00 52.00 37.00 35.00 35.00 13.00 12.00
1973 18.00 29.00 32.00 37.00 41.00 42.00 49.00 48.00 47.00 40.00 32.00 33.00 18.00
1974 21.00 32.00 29.00 35.00 a 38.00 45.00 49.00 52.00 43.00 38.00 32.00 30.00 21.00
1975 27.00 29.00 30.00 33.00 39.00 47.00 52.00 50.00 47.00 37.00 25.00 29.00 25.00
1976 28.00 24.00 26.00 33.00 42.00 42.00 50.00 52.00 48.00 39.00 27.00 31.00 24.00
1977 25.00 32.00 34.00 37.00 39.00 46.00 50.00 51.00 45.00 40.00 21.00 29.00 21.00
1978 26.00 32.00 28.00 34.00 40.00 49.00 a 50.00 51.00 46.00 36.00 26.00 16.00 a 16.00
1979 18.00 j 21.00 j 34.00 38.00 d 45.00 46.00 ----- z 48.00 m 49.00 a 40.00 31.00 29.00 18.00
1980 12.00 a 29.00 30.00 36.00 41.00 a 45.00 c 51.00 47.00 47.00 38.00 33.00 24.00 12.00
1981 28.00 a 23.00 d 28.00 32.00 b 40.00 45.00 48.00 d 49.00 43.00 35.00 29.00 27.00 23.00
1982 9.00 26.00 28.00 32.00 40.00 45.00 48.00 49.00 45.00 33.00 27.00 25.00 9.00
1983 22.00 30.00 24.00 29.00 42.00 49.00 44.00 ----- z ----- z ----- z ----- z ----- z 22.00
Period of Record Statistics
MEAN 21.09 26.76 29.41 33.77 38.97 44.99 48.40 49.02 43.37 36.77 30.18 24.94 18.64
S.D. 6.82 5.53 3.34 3.04 2.86 2.91 2.45 2.36 3.39 3.52 4.69 6.56 6.19
SKEW -0.18 -1.26 -1.09 -1.14 -0.45 -0.22 -0.35 -0.86 -1.02 -0.46 -1.00 -1.04 0.06
MAX 33.00 34.00 36.00 39.00 46.00 52.00 54.00 53.00 50.00 43.00 40.00 34.00 30.00
MIN 6.00 8.00 17.00 21.00 30.00 36.00 41.00 41.00 30.00 28.00 10.00 5.00 6.00
NO YRS 69 72 74 73 72 69 68 66 68 69 71 69 47