PORTLAND WSO CITY, OREGON

Monthly Average 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 34.00 37.72 44.13 44.10 51.00 54.67 58.77 56.68 52.83 48.19 41.10 35.06 46.52
1929 29.03 29.43 40.77 40.93 48.77 53.57 56.61 57.29 54.03 49.39 37.70 40.71 44.85
1930 23.52 39.46 41.74 47.07 46.29 52.47 55.71 59.03 54.97 46.03 39.80 36.19 45.19
1931 39.61 38.82 41.84 45.87 51.94 54.60 58.13 57.29 53.97 47.61 38.33 35.90 46.99
1932 35.29 35.83 42.39 45.20 48.74 55.20 55.81 58.84 53.90 49.77 43.53 33.52 46.50
1933 36.10 32.64 40.10 41.83 46.84 53.23 56.90 58.84 51.90 49.03 41.40 42.81 45.97
1934 42.26 42.46 46.42 49.53 52.10 54.13 57.13 58.45 53.23 49.23 45.70 40.10 49.23
1935 34.90 39.96 37.81 42.93 46.77 54.37 56.94 57.13 56.30 46.06 36.53 37.68 45.62
1936 39.81 28.90 38.13 46.63 51.74 56.53 57.81 58.65 53.73 49.13 38.07 40.16 46.61
1937 25.35 36.46 43.26 42.97 48.55 56.10 58.39 56.97 55.17 51.00 45.23 39.03 46.54
1938 36.32 38.57 40.45 45.40 49.00 54.47 59.23 55.77 57.37 49.90 40.10 39.23 47.15
1939 39.58 35.61 41.26 45.77 50.42 52.87 58.32 58.39 55.67 49.48 43.53 41.74 47.72
1940 37.13 42.41 44.48 47.10 51.90 55.77 58.71 59.03 57.50 51.81 38.83 39.00 48.64
1941 39.16 42.14 45.61 47.00 50.06 54.83 61.19 59.58 53.83 49.39 43.47 39.68 48.83
1942 32.94 39.04 40.03 45.67 49.32 53.50 61.00 59.71 55.17 49.55 41.63 40.29 47.32
1943 30.06 39.21 40.58 46.90 47.90 52.80 57.45 57.32 56.73 50.19 43.23 37.13 46.63
1944 36.19 38.31 39.65 44.93 49.61 53.67 57.71 57.77 56.40 52.16 42.57 36.39 47.11
1945 40.10 40.61 40.06 44.20 51.71 53.77 58.87 58.29 53.30 48.23 42.67 38.26 47.50
1946 37.81 39.29 40.94 44.50 52.00 53.80 58.77 58.03 54.23 46.32 39.27 39.81 47.06
1947 34.39 41.39 44.48 47.13 52.81 54.27 58.35 56.74 55.30 50.71 43.63 40.26 48.29
1948 36.48 36.90 39.68 42.97 49.10 57.10 56.90 57.10 53.17 47.58 40.34 a 35.20 a 46.04
1949 25.47 a 35.93 41.94 45.43 51.45 53.10 56.87 a 58.23 55.60 43.29 46.07 38.29 45.97
1950 23.94 36.36 40.39 42.87 46.84 54.67 57.53 a 59.68 53.83 47.74 42.90 43.52 45.85
1951 35.90 39.07 36.68 45.80 48.74 55.03 57.45 56.32 55.13 49.06 42.30 35.00 46.37
1952 33.10 36.59 39.52 43.73 48.90 52.33 57.35 57.90 55.33 51.74 36.77 39.00 46.02
1953 44.00 39.00 40.42 43.77 48.00 51.90 57.00 58.48 55.20 48.61 45.23 40.58 47.68
1954 35.32 38.93 37.29 42.27 49.19 51.27 55.03 56.39 53.70 47.68 46.27 38.16 45.96
1955 36.77 36.11 35.94 39.93 45.48 52.83 55.29 56.16 53.70 49.03 37.03 36.39 44.56
1956 37.52 33.00 39.35 45.20 51.26 52.50 58.06 58.03 54.23 47.06 40.07 36.68 46.08
1957 27.45 37.14 41.65 45.70 52.35 55.10 56.68 56.53 a 57.70 48.52 39.73 39.65 46.52
1958 41.13 45.11 39.84 44.40 54.03 58.47 60.65 59.74 55.00 50.32 42.60 42.13 49.45
1959 38.39 38.14 40.94 45.27 47.84 55.07 58.74 56.55 53.57 50.00 40.27 37.94 46.89
1960 32.87 a 37.00 f 39.39 44.43 47.29 54.03 58.03 56.90 54.50 48.77 42.37 35.77 46.76
1961 41.06 43.00 41.68 43.87 49.48 56.17 59.26 60.81 51.90 46.94 38.73 38.16 47.59
1962 33.90 38.11 39.29 44.57 47.03 52.60 56.06 57.65 55.77 49.03 44.33 40.42 46.56
1963 30.97 43.93 40.10 43.37 49.65 53.97 56.39 58.26 57.93 49.97 43.53 37.94 47.17
1964 39.48 37.28 39.77 41.20 46.10 52.53 ----- z 57.10 52.87 49.35 39.67 35.06 44.58
1965 38.35 39.39 41.03 44.90 46.35 51.93 58.29 59.39 52.60 50.29 45.47 36.00 47.00
1966 37.61 38.46 40.26 45.73 48.77 53.67 56.71 57.45 56.03 47.32 44.47 41.58 47.34
1967 41.19 38.79 38.81 40.77 48.58 56.67 58.55 61.45 56.97 49.16 44.27 38.42 47.80
1968 36.48 44.45 43.16 42.47 49.32 54.40 59.10 57.84 54.57 47.26 42.80 33.97 47.15
1969 29.58 37.64 40.39 43.77 51.71 58.17 56.68 56.23 55.07 46.65 43.13 40.19 46.60
1970 37.45 42.14 40.77 41.37 47.19 55.63 57.32 56.65 52.57 47.13 42.33 37.10 46.47
1971 37.65 38.21 38.65 42.83 48.52 51.80 58.06 60.71 52.40 46.16 41.97 36.65 46.13
1972 34.58 38.59 43.42 40.23 50.94 54.47 59.16 60.13 51.83 46.39 43.63 33.65 46.42
1973 34.90 39.75 41.39 43.73 49.32 54.27 ----- z ----- z ----- z ----- z ----- z ----- z 43.89
Period of Record Statistics
MEAN 35.33 38.45 40.78 44.27 49.37 54.22 57.80 58.03 54.59 48.63 41.84 38.23 46.84
S.D. 4.85 3.35 2.17 2.07 2.05 1.63 1.38 1.37 1.61 1.78 2.63 2.47 1.05
SKEW -0.80 -0.63 0.39 -0.07 0.16 0.57 0.36 0.58 0.22 -0.42 -0.31 0.00 0.39
MAX 44.00 45.11 46.42 49.53 54.03 58.47 61.19 61.45 57.93 52.16 46.27 43.52 49.45
MIN 23.52 28.90 35.94 39.93 45.48 51.27 55.03 55.77 51.83 43.29 36.53 33.52 44.56
NO YRS 46 45 46 46 46 46 44 45 45 45 45 45 43