PORTLAND WSO CITY, OREGON

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(356761)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 197306
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
1928 15.00 31.00 32.00 37.00 40.00 48.00 50.00 52.00 43.00 35.00 31.00 25.00 15.00
1929 15.00 16.00 33.00 33.00 43.00 47.00 53.00 50.00 45.00 38.00 30.00 34.00 15.00
1930 13.00 31.00 33.00 38.00 37.00 45.00 50.00 51.00 44.00 38.00 29.00 28.00 13.00
1931 30.00 32.00 33.00 37.00 40.00 47.00 53.00 52.00 45.00 39.00 25.00 25.00 25.00
1932 22.00 22.00 31.00 38.00 41.00 46.00 49.00 54.00 46.00 40.00 33.00 16.00 16.00
1933 23.00 12.00 33.00 34.00 43.00 45.00 52.00 52.00 40.00 38.00 35.00 34.00 12.00
1934 34.00 33.00 38.00 39.00 43.00 47.00 52.00 53.00 39.00 42.00 39.00 34.00 33.00
1935 12.00 29.00 32.00 36.00 41.00 42.00 49.00 49.00 50.00 29.00 23.00 28.00 12.00
1936 27.00 14.00 31.00 31.00 41.00 51.00 53.00 52.00 44.00 36.00 30.00 27.00 14.00
1937 14.00 19.00 36.00 38.00 39.00 47.00 50.00 48.00 44.00 44.00 38.00 32.00 14.00
1938 26.00 31.00 34.00 38.00 40.00 46.00 50.00 49.00 53.00 39.00 32.00 29.00 26.00
1939 33.00 24.00 32.00 38.00 40.00 47.00 52.00 49.00 47.00 38.00 35.00 28.00 24.00
1940 27.00 32.00 39.00 40.00 44.00 46.00 51.00 52.00 46.00 41.00 30.00 29.00 27.00
1941 27.00 36.00 36.00 41.00 43.00 50.00 53.00 54.00 47.00 44.00 30.00 23.00 23.00
1942 21.00 30.00 33.00 41.00 40.00 48.00 53.00 51.00 49.00 39.00 34.00 33.00 21.00
1943 11.00 31.00 31.00 39.00 41.00 46.00 51.00 52.00 49.00 42.00 36.00 30.00 11.00
1944 31.00 32.00 32.00 38.00 40.00 46.00 50.00 51.00 46.00 46.00 33.00 30.00 30.00
1945 30.00 32.00 30.00 35.00 47.00 46.00 51.00 52.00 42.00 38.00 34.00 26.00 26.00
1946 28.00 31.00 33.00 35.00 45.00 50.00 52.00 52.00 43.00 35.00 30.00 27.00 27.00
1947 22.00 32.00 37.00 38.00 46.00 47.00 53.00 48.00 46.00 46.00 32.00 33.00 22.00
1948 28.00 27.00 33.00 35.00 41.00 52.00 48.00 50.00 43.00 38.00 35.00 a 25.00 a 25.00
1949 17.00 a 25.00 36.00 38.00 40.00 48.00 50.00 a 52.00 47.00 33.00 35.00 28.00 17.00
1950 8.00 7.00 33.00 37.00 41.00 48.00 50.00 a 51.00 41.00 38.00 33.00 37.00 7.00
1951 18.00 25.00 28.00 39.00 41.00 49.00 53.00 49.00 47.00 38.00 33.00 26.00 18.00
1952 21.00 31.00 32.00 35.00 39.00 44.00 52.00 52.00 47.00 41.00 27.00 32.00 21.00
1953 33.00 32.00 31.00 33.00 42.00 46.00 51.00 54.00 47.00 40.00 36.00 33.00 31.00
1954 17.00 32.00 30.00 36.00 37.00 46.00 48.00 51.00 46.00 37.00 32.00 29.00 17.00
1955 30.00 28.00 23.00 35.00 39.00 45.00 46.00 50.00 45.00 40.00 15.00 26.00 15.00
1956 19.00 17.00 30.00 35.00 42.00 48.00 51.00 51.00 45.00 36.00 31.00 24.00 17.00
1957 11.00 28.00 35.00 37.00 46.00 50.00 50.00 50.00 a 49.00 40.00 32.00 33.00 11.00
1958 34.00 34.00 33.00 39.00 41.00 52.00 53.00 55.00 46.00 41.00 31.00 35.00 31.00
1959 18.00 32.00 36.00 37.00 40.00 49.00 51.00 52.00 47.00 39.00 29.00 28.00 18.00
1960 24.00 a 24.00 f 23.00 38.00 38.00 48.00 50.00 51.00 45.00 40.00 33.00 29.00 23.00
1961 25.00 36.00 33.00 35.00 42.00 49.00 53.00 54.00 43.00 38.00 32.00 22.00 22.00
1962 16.00 21.00 31.00 39.00 39.00 45.00 48.00 51.00 51.00 42.00 32.00 28.00 16.00
1963 13.00 34.00 33.00 35.00 40.00 48.00 52.00 52.00 52.00 38.00 33.00 29.00 13.00
1964 35.00 31.00 34.00 34.00 36.00 48.00 ----- z 51.00 46.00 40.00 28.00 10.00 10.00
1965 33.00 32.00 33.00 36.00 38.00 45.00 52.00 47.00 42.00 42.00 35.00 24.00 24.00
1966 29.00 31.00 33.00 40.00 40.00 45.00 52.00 52.00 52.00 39.00 36.00 36.00 29.00
1967 34.00 35.00 31.00 35.00 42.00 52.00 53.00 54.00 49.00 42.00 37.00 26.00 26.00
1968 25.00 34.00 34.00 33.00 40.00 49.00 52.00 53.00 48.00 41.00 35.00 6.00 6.00
1969 16.00 33.00 32.00 37.00 42.00 52.00 52.00 51.00 46.00 39.00 34.00 33.00 16.00
1970 28.00 36.00 34.00 34.00 39.00 48.00 52.00 49.00 41.00 34.00 28.00 27.00 27.00
1971 26.00 30.00 26.00 37.00 43.00 48.00 49.00 53.00 43.00 31.00 32.00 29.00 26.00
1972 17.00 23.00 34.00 33.00 41.00 48.00 52.00 53.00 39.00 34.00 34.00 13.00 13.00
1973 21.00 30.00 36.00 37.00 42.00 46.00 ----- z ----- z ----- z ----- z ----- z ----- z 21.00
Period of Record Statistics
MEAN 22.98 28.31 32.52 36.59 40.98 47.50 51.07 51.36 45.67 38.84 31.93 27.53 19.81
S.D. 7.50 6.75 3.17 2.30 2.32 2.24 1.70 1.80 3.31 3.46 4.13 6.36 6.93
SKEW -0.12 -1.41 -0.99 -0.19 0.47 0.27 -0.82 -0.29 0.08 -0.45 -1.67 -1.49 0.03
MAX 35.00 36.00 39.00 41.00 47.00 52.00 53.00 55.00 53.00 46.00 39.00 37.00 33.00
MIN 8.00 7.00 23.00 31.00 36.00 42.00 46.00 47.00 39.00 29.00 15.00 6.00 6.00
NO YRS 46 45 46 46 46 46 44 45 45 45 45 45 43