SEATTLE WB AIRPORT, WASHINGTON

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(457483)

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 196509
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 49.00 47.00 ----- z 38.00 30.00 28.00 18.00 18.00
1949 14.00 20.00 30.00 36.00 37.00 45.00 45.00 47.00 41.00 28.00 35.00 23.00 14.00
1950 3.00 4.00 31.00 33.00 36.00 46.00 52.00 46.00 36.00 36.00 26.00 33.00 3.00
1951 16.00 27.00 a 26.00 31.00 37.00 43.00 49.00 47.00 43.00 34.00 28.00 17.00 16.00
1952 14.00 29.00 30.00 30.00 33.00 41.00 47.00 48.00 41.00 38.00 19.00 28.00 14.00
1953 29.00 29.00 28.00 33.00 39.00 45.00 49.00 49.00 42.00 35.00 31.00 32.00 28.00
1954 19.00 30.00 26.00 33.00 30.00 44.00 47.00 48.00 40.00 33.00 33.00 28.00 19.00
1955 29.00 25.00 16.00 33.00 39.00 44.00 47.00 48.00 41.00 39.00 8.00 25.00 8.00
1956 20.00 16.00 25.00 34.00 38.00 44.00 49.00 48.00 40.00 34.00 26.00 20.00 16.00
1957 8.00 21.00 34.00 36.00 46.00 48.00 50.00 47.00 40.00 34.00 29.00 31.00 8.00
1958 30.00 32.00 31.00 37.00 39.00 52.00 52.00 53.00 41.00 38.00 24.00 28.00 24.00
1959 14.00 30.00 32.00 35.00 37.00 49.00 49.00 46.00 47.00 33.00 25.00 29.00 14.00
1960 25.00 24.00 26.00 34.00 39.00 47.00 50.00 46.00 43.00 30.00 29.00 27.00 24.00
1961 27.00 37.00 30.00 30.00 40.00 46.00 53.00 53.00 39.00 35.00 26.00 25.00 25.00
1962 13.00 20.00 27.00 39.00 37.00 45.00 47.00 49.00 46.00 37.00 33.00 24.00 13.00
1963 15.00 31.00 30.00 32.00 37.00 48.00 49.00 50.00 45.00 35.00 30.00 28.00 15.00
1964 31.00 29.00 30.00 34.00 36.00 49.00 54.00 49.00 45.00 39.00 32.00 11.00 11.00
1965 30.00 33.00 26.00 36.00 38.00 49.00 52.00 50.00 42.00 ----- z ----- z ----- z 26.00
Period of Record Statistics
MEAN 19.82 25.71 28.12 33.88 37.53 46.33 49.33 48.47 41.67 34.59 27.18 25.12 15.75
S.D. 8.62 7.81 4.03 2.45 3.26 2.74 2.47 2.12 2.83 3.18 6.31 5.83 6.86
SKEW -0.19 -1.24 -1.48 0.19 0.20 0.10 0.25 0.93 0.13 -0.44 -1.69 -0.87 0.14
MAX 31.00 37.00 34.00 39.00 46.00 52.00 54.00 53.00 47.00 39.00 35.00 33.00 28.00
MIN 3.00 4.00 16.00 30.00 30.00 41.00 45.00 46.00 36.00 28.00 8.00 11.00 3.00
NO YRS 17 17 17 17 17 18 18 17 18 17 17 17 16