PORTLAND WSFO, OREGON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(356751)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1941 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 41.27 38.06 39.67
1942 30.87 36.29 37.06 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 39.37 38.32 36.38
1943 26.45 34.32 37.45 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 38.67 33.61 34.10
1944 32.81 35.38 35.97 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 38.93 33.90 35.40
1945 36.32 37.96 38.35 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 40.07 34.74 37.49
1946 35.13 36.00 38.71 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 35.27 36.52 36.32
1947 30.97 36.61 39.71 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 41.43 37.52 37.25
1948 33.32 34.07 37.10 ----- z ----- z ----- z ----- z ----- z 50.77 44.71 37.93 33.29 38.74
1949 21.03 32.96 38.26 41.80 48.48 50.53 54.61 55.55 51.27 39.45 41.30 36.48 42.64
1950 21.19 32.07 38.65 39.23 43.19 52.20 54.71 55.74 49.20 46.06 41.23 41.35 42.90
1951 35.03 36.04 34.45 40.87 46.45 51.87 55.68 53.42 50.20 45.74 40.23 32.42 43.53
1952 30.84 34.97 38.26 40.40 46.45 51.13 54.97 56.06 50.57 45.52 31.83 36.42 43.12
1953 42.58 36.32 38.13 40.93 45.52 50.80 54.42 54.97 50.30 44.19 42.23 38.32 44.89
1954 33.81 35.25 33.58 39.77 46.03 49.67 53.48 55.00 50.43 43.13 43.47 35.74 43.28
1955 34.61 33.54 33.77 37.93 42.77 50.70 54.68 53.68 48.87 46.16 35.87 33.74 42.19
1956 34.65 30.83 36.55 41.67 48.35 50.43 55.87 55.10 49.60 44.39 34.63 35.29 43.11
1957 29.48 33.18 39.35 42.23 50.23 52.57 54.48 53.81 51.40 44.32 34.90 38.52 43.71
1958 37.29 42.57 36.13 41.20 50.16 56.83 57.65 57.32 50.57 43.13 39.20 38.03 45.84
1959 35.29 36.75 38.65 42.50 46.23 54.00 56.58 53.81 51.30 45.39 35.03 33.16 44.06
1960 31.29 35.03 36.55 41.13 45.45 51.63 55.26 55.26 49.77 44.81 39.53 32.48 43.18
1961 36.97 41.77 b 40.58 41.47 47.35 53.33 57.45 57.71 47.87 43.97 34.90 35.68 44.92
1962 31.87 35.57 36.97 42.73 46.65 50.53 53.84 55.16 51.77 46.65 41.20 36.61 44.13
1963 28.68 40.21 36.71 41.23 45.71 51.50 54.06 55.74 53.70 45.26 39.33 31.97 43.68
1964 35.10 30.59 35.71 37.43 41.87 48.97 53.10 52.19 46.53 41.94 34.43 31.39 40.77
1965 35.06 36.21 35.52 41.63 43.97 49.70 56.00 57.00 47.93 47.45 43.53 33.52 43.96
1966 35.00 35.18 38.06 40.17 44.32 50.63 55.48 54.65 53.43 43.90 40.70 39.52 44.25
1967 38.23 34.68 36.00 37.57 45.97 54.27 55.90 57.68 52.77 45.74 38.40 35.10 44.36
1968 34.00 38.48 39.26 38.20 47.00 51.67 55.94 55.84 51.60 43.29 39.53 32.42 43.94
1969 27.39 32.39 34.13 40.20 47.35 56.93 55.19 53.68 52.83 44.35 40.17 37.94 43.55
1970 35.03 37.11 36.61 39.27 45.10 53.87 55.81 54.87 49.33 42.26 40.03 34.06 43.61
1971 35.45 35.14 35.35 39.10 45.87 50.60 56.94 59.61 49.90 43.71 39.50 35.35 43.88
1972 33.48 37.03 41.19 38.63 48.87 53.33 57.77 58.39 49.47 41.87 41.43 31.71 44.43
1973 32.87 36.57 40.03 41.07 47.58 53.50 57.03 54.32 52.90 45.84 39.10 39.74 45.05
1974 32.19 37.57 39.06 43.30 46.97 53.07 56.16 57.39 52.67 42.45 41.50 38.58 45.08
1975 36.10 34.68 37.61 38.03 46.55 51.70 57.90 55.29 51.63 46.97 39.87 37.23 44.46
1976 36.55 34.97 35.68 40.37 45.94 49.90 55.77 56.71 53.80 44.45 37.77 33.52 43.78
1977 28.32 36.79 38.06 40.40 45.26 52.40 54.77 59.26 51.77 44.03 36.97 37.10 43.76
1978 35.61 37.96 38.94 42.07 44.81 54.63 56.71 57.29 52.80 42.48 31.23 28.87 43.62
1979 26.00 37.00 40.97 44.27 49.65 53.47 57.58 58.52 55.20 49.48 38.53 38.87 45.79
1980 29.35 35.48 38.97 43.13 48.55 52.83 57.71 55.13 52.37 45.23 42.20 37.84 44.90
1981 36.52 36.07 39.23 43.53 48.77 53.00 56.71 58.77 53.20 44.23 41.17 37.42 45.72
1982 35.16 36.75 39.03 39.33 46.32 55.17 56.87 57.55 53.13 45.94 37.37 36.19 44.90
1983 38.29 41.18 43.68 42.43 50.39 54.63 57.77 59.35 51.13 44.84 44.70 32.48 46.74
1984 35.77 39.10 43.06 42.80 48.00 53.07 57.19 57.71 53.57 45.87 40.87 33.81 45.90
1985 28.94 33.46 36.71 44.43 48.29 53.27 60.74 57.45 50.97 43.84 31.57 26.84 43.04
1986 35.68 36.36 42.00 40.87 47.90 55.20 55.13 58.39 52.33 46.81 41.63 34.68 45.58
1987 33.52 37.68 40.74 43.60 49.61 53.63 56.94 56.94 52.43 44.55 41.93 33.87 45.45
1988 33.65 35.76 37.71 43.67 46.90 51.77 55.90 54.97 51.03 49.84 42.17 36.39 44.98
1989 36.65 28.50 38.48 45.20 48.26 53.57 55.90 56.58 50.80 46.10 42.10 34.61 44.73
1990 37.68 35.04 39.87 44.63 47.84 54.00 58.52 59.58 56.00 45.19 42.30 29.35 45.83
1991 31.16 39.89 37.77 42.00 47.06 51.40 57.26 58.48 53.30 43.87 41.83 37.58 45.13
1992 38.52 39.97 40.81 46.50 49.58 55.23 58.68 56.65 50.97 47.23 40.47 34.58 46.60
1993 30.77 32.79 39.10 45.20 50.90 53.37 55.84 57.32 51.17 47.00 33.77 34.71 44.33
1994 38.77 34.07 39.48 44.67 50.03 52.13 57.48 58.23 55.77 43.84 37.03 37.00 45.71
1995 38.48 37.96 39.03 41.90 49.84 53.37 59.52 55.61 56.60 45.74 46.23 37.42 46.81
1996 36.19 33.97 39.39 45.23 47.77 52.93 59.29 58.45 52.37 46.06 39.67 36.52 45.65
1997 36.29 34.86 38.94 42.63 51.71 53.70 58.42 60.35 56.03 46.65 43.70 36.06 46.61
1998 38.13 40.36 41.26 43.40 49.77 54.37 61.16 59.29 54.73 46.52 44.43 35.48 47.41
1999 37.74 38.11 38.87 40.97 45.90 53.03 56.06 59.52 50.97 44.74 44.23 38.68 45.74
2000 34.52 37.10 37.29 43.90 49.06 54.13 57.23 56.87 53.90 47.37 a 36.03 35.16 45.21
2001 35.45 33.57 39.39 41.30 47.29 51.53 55.97 58.29 53.62 a 44.77 42.23 36.97 45.03
2002 36.71 36.29 37.58 43.57 46.77 54.30 57.90 57.19 52.83 44.52 39.97 38.29 45.49
2003 38.77 36.96 42.33 a 43.40 48.06 54.80 58.48 58.39 55.07 50.39 38.93 37.81 46.95
2004 34.29 38.76 42.03 45.30 51.74 55.17 59.61 60.68 54.30 48.52 39.67 38.26 47.36
2005 35.61 33.25 39.84 44.23 51.81 53.67 59.06 58.13 51.47 49.87 37.07 35.29 45.77
2006 40.84 34.71 38.48 43.33 49.32 56.37 59.45 57.16 52.53 44.55 42.27 34.71 46.14
2007 31.81 38.00 42.52 42.97 47.61 53.57 59.87 57.97 52.03 45.19 37.63 36.35 45.46
2008 33.65 37.34 37.94 40.33 50.26 51.87 56.81 59.19 53.13 44.87 43.33 32.13 45.07
2009 33.90 32.43 38.06 42.23 48.74 56.60 60.58 59.26 55.07 47.00 41.37 29.61 45.40
2010 40.45 39.00 39.65 42.77 46.84 52.10 55.94 56.77 55.87 46.71 39.57 38.48 46.18
2011 36.06 34.14 39.74 39.83 45.61 53.23 56.45 59.23 55.77 49.16 38.50 32.84 45.05
2012 34.32 37.72 37.97 44.50 48.03 52.73 57.81 58.94 53.43 48.03 44.23 39.19 46.41
2013 33.29 38.89 40.84 51.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 37.67
Period of Record Statistics
MEAN 34.08 36.05 38.48 41.88 47.51 52.91 56.78 56.96 52.15 45.36 39.59 35.47 44.79
S.D. 3.98 2.62 2.14 2.14 2.15 1.80 1.81 1.94 2.16 2.06 3.19 2.80 1.32
SKEW -1.01 -0.05 0.01 -0.16 -0.18 0.10 0.33 -0.29 -0.04 0.19 -0.61 -0.63 -0.31
MAX 42.58 42.57 43.68 46.50 51.81 56.93 61.16 60.68 56.60 50.39 46.23 41.35 47.41
MIN 21.03 28.50 33.58 37.43 41.87 48.97 53.10 52.19 46.53 39.45 31.23 26.84 40.77
NO YRS 72 72 72 64 64 64 64 64 65 65 72 72 64