PORTLAND WSFO, OREGON

Monthly Extreme 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 28.00 24.00 24.00
1942 19.00 26.00 31.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 29.00 31.00 19.00
1943 3.00 29.00 25.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 32.00 26.00 3.00
1944 27.00 27.00 24.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 28.00 25.00 24.00
1945 24.00 28.00 29.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 29.00 22.00 22.00
1946 27.00 27.00 31.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 28.00 20.00 20.00
1947 18.00 25.00 30.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 29.00 31.00 18.00
1948 24.00 24.00 30.00 ----- z ----- z ----- z ----- z ----- z 41.00 32.00 29.00 22.00 22.00
1949 9.00 23.00 31.00 32.00 36.00 41.00 48.00 45.00 40.00 27.00 29.00 25.00 9.00
1950 -2.00 -3.00 28.00 31.00 38.00 45.00 48.00 47.00 36.00 33.00 26.00 35.00 -3.00
1951 16.00 26.00 26.00 29.00 37.00 46.00 48.00 44.00 39.00 31.00 31.00 22.00 16.00
1952 20.00 28.00 28.00 32.00 33.00 42.00 47.00 49.00 42.00 37.00 18.00 25.00 18.00
1953 29.00 27.00 28.00 31.00 37.00 43.00 48.00 48.00 38.00 33.00 31.00 33.00 27.00
1954 19.00 25.00 23.00 31.00 29.00 42.00 45.00 48.00 35.00 32.00 30.00 26.00 19.00
1955 25.00 20.00 19.00 29.00 36.00 44.00 43.00 45.00 38.00 38.00 13.00 23.00 13.00
1956 13.00 16.00 24.00 30.00 36.00 46.00 48.00 48.00 42.00 35.00 22.00 23.00 13.00
1957 6.00 22.00 27.00 32.00 43.00 46.00 46.00 47.00 39.00 34.00 26.00 32.00 6.00
1958 26.00 27.00 27.00 34.00 36.00 50.00 51.00 50.00 42.00 30.00 23.00 27.00 23.00
1959 16.00 29.00 31.00 33.00 37.00 45.00 47.00 46.00 43.00 31.00 25.00 22.00 16.00
1960 22.00 19.00 22.00 33.00 33.00 47.00 47.00 47.00 41.00 33.00 30.00 23.00 19.00
1961 23.00 35.00 b 30.00 33.00 39.00 42.00 49.00 51.00 34.00 32.00 23.00 21.00 21.00
1962 9.00 20.00 28.00 35.00 34.00 44.00 44.00 46.00 42.00 38.00 31.00 22.00 9.00
1963 11.00 32.00 28.00 33.00 36.00 44.00 46.00 47.00 44.00 30.00 26.00 20.00 11.00
1964 28.00 23.00 29.00 30.00 32.00 42.00 47.00 46.00 39.00 32.00 25.00 6.00 6.00
1965 29.00 29.00 25.00 32.00 35.00 41.00 50.00 46.00 34.00 36.00 32.00 19.00 19.00
1966 24.00 26.00 29.00 32.00 37.00 39.00 52.00 48.00 46.00 34.00 33.00 32.00 24.00
1967 31.00 27.00 25.00 31.00 39.00 46.00 52.00 51.00 43.00 36.00 25.00 13.00 13.00
1968 24.00 26.00 27.00 30.00 38.00 45.00 48.00 49.00 44.00 35.00 31.00 8.00 8.00
1969 16.00 23.00 22.00 33.00 36.00 50.00 49.00 46.00 42.00 31.00 28.00 24.00 16.00
1970 23.00 31.00 29.00 30.00 37.00 45.00 50.00 45.00 36.00 29.00 27.00 26.00 23.00
1971 20.00 23.00 22.00 30.00 40.00 45.00 46.00 52.00 40.00 26.00 27.00 23.00 20.00
1972 18.00 18.00 29.00 30.00 37.00 47.00 49.00 51.00 39.00 30.00 30.00 8.00 8.00
1973 22.00 26.00 33.00 33.00 40.00 44.00 50.00 45.00 44.00 37.00 29.00 30.00 22.00
1974 12.00 29.00 25.00 34.00 39.00 45.00 49.00 48.00 43.00 35.00 31.00 28.00 12.00
1975 26.00 27.00 27.00 30.00 37.00 45.00 51.00 48.00 42.00 36.00 29.00 26.00 26.00
1976 26.00 24.00 25.00 31.00 41.00 42.00 46.00 49.00 45.00 33.00 22.00 23.00 22.00
1977 17.00 28.00 29.00 31.00 40.00 41.00 46.00 51.00 42.00 37.00 26.00 27.00 17.00
1978 23.00 27.00 28.00 33.00 35.00 47.00 49.00 48.00 44.00 31.00 18.00 13.00 13.00
1979 14.00 16.00 33.00 38.00 42.00 44.00 47.00 52.00 45.00 38.00 30.00 28.00 14.00
1980 13.00 25.00 33.00 31.00 42.00 45.00 53.00 44.00 44.00 33.00 33.00 22.00 13.00
1981 28.00 25.00 28.00 31.00 40.00 48.00 45.00 50.00 43.00 34.00 26.00 29.00 25.00
1982 14.00 21.00 31.00 31.00 37.00 47.00 49.00 47.00 43.00 35.00 24.00 22.00 14.00
1983 25.00 28.00 34.00 33.00 43.00 49.00 50.00 51.00 37.00 36.00 29.00 12.00 12.00
1984 19.00 30.00 32.00 36.00 42.00 46.00 50.00 50.00 42.00 35.00 31.00 18.00 18.00
1985 21.00 15.00 27.00 36.00 37.00 45.00 53.00 50.00 39.00 30.00 13.00 20.00 13.00
1986 28.00 25.00 33.00 33.00 37.00 46.00 47.00 50.00 42.00 39.00 30.00 27.00 25.00
1987 23.00 25.00 32.00 34.00 43.00 45.00 51.00 50.00 45.00 37.00 28.00 23.00 23.00
1988 22.00 22.00 29.00 32.00 38.00 42.00 48.00 50.00 44.00 35.00 31.00 26.00 22.00
1989 28.00 9.00 19.00 33.00 42.00 47.00 51.00 51.00 44.00 32.00 32.00 25.00 9.00
1990 26.00 20.00 29.00 36.00 38.00 49.00 51.00 50.00 47.00 37.00 32.00 12.00 12.00
1991 20.00 30.00 32.00 33.00 40.00 42.00 52.00 49.00 47.00 27.00 30.00 26.00 20.00
1992 29.00 29.00 31.00 37.00 39.00 46.00 54.00 47.00 42.00 33.00 31.00 27.00 27.00
1993 20.00 24.00 31.00 38.00 42.00 47.00 50.00 48.00 42.00 39.00 18.00 25.00 18.00
1994 27.00 22.00 29.00 36.00 41.00 46.00 51.00 51.00 49.00 38.00 28.00 24.00 22.00
1995 29.00 16.00 28.00 35.00 43.00 47.00 52.00 48.00 48.00 28.00 29.00 28.00 16.00
1996 17.00 14.00 28.00 38.00 38.00 48.00 50.00 52.00 44.00 36.00 28.00 28.00 14.00
1997 26.00 27.00 31.00 31.00 40.00 49.00 51.00 56.00 48.00 38.00 35.00 29.00 26.00
1998 24.00 31.00 29.00 35.00 45.00 51.00 57.00 51.00 47.00 37.00 34.00 11.00 11.00
1999 27.00 31.00 31.00 32.00 37.00 44.00 50.00 54.00 40.00 37.00 36.00 26.00 26.00
2000 26.00 27.00 31.00 33.00 39.00 43.00 51.00 50.00 40.00 38.00 a 24.00 29.00 24.00
2001 27.00 26.00 32.00 33.00 41.00 44.00 51.00 52.00 47.00 a 38.00 31.00 29.00 26.00
2002 26.00 27.00 28.00 37.00 37.00 45.00 50.00 51.00 48.00 32.00 27.00 29.00 26.00
2003 27.00 29.00 32.00 a 36.00 38.00 49.00 52.00 53.00 48.00 32.00 26.00 27.00 26.00
2004 18.00 30.00 35.00 36.00 44.00 47.00 55.00 57.00 47.00 38.00 31.00 30.00 18.00
2005 25.00 24.00 34.00 37.00 42.00 47.00 55.00 51.00 41.00 38.00 28.00 24.00 24.00
2006 34.00 22.00 29.00 36.00 39.00 52.00 53.00 50.00 45.00 30.00 27.00 25.00 22.00
2007 19.00 24.00 32.00 32.00 38.00 48.00 54.00 51.00 44.00 35.00 27.00 27.00 19.00
2008 23.00 29.00 32.00 31.00 39.00 46.00 51.00 48.00 44.00 37.00 33.00 20.00 20.00
2009 25.00 25.00 29.00 31.00 42.00 51.00 55.00 52.00 46.00 39.00 35.00 12.00 12.00
2010 35.00 27.00 30.00 34.00 41.00 46.00 48.00 50.00 48.00 38.00 18.00 22.00 18.00
2011 23.00 18.00 31.00 31.00 38.00 45.00 49.00 55.00 47.00 36.00 29.00 24.00 18.00
2012 26.00 30.00 28.00 31.00 37.00 46.00 50.00 49.00 47.00 40.00 35.00 29.00 26.00
2013 23.00 30.00 29.00 51.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 23.00
Period of Record Statistics
MEAN 21.67 24.61 28.69 32.89 38.50 45.52 49.61 49.23 42.66 34.29 27.89 23.62 17.58
S.D. 6.89 5.76 3.37 2.39 3.05 2.68 2.85 2.76 3.66 3.40 4.70 6.10 6.44
SKEW -1.02 -1.93 -0.79 0.54 -0.33 0.10 0.15 0.35 -0.43 -0.47 -1.15 -1.02 -0.54
MAX 35.00 35.00 35.00 38.00 45.00 52.00 57.00 57.00 49.00 40.00 36.00 35.00 27.00
MIN -2.00 -3.00 19.00 29.00 29.00 39.00 43.00 44.00 34.00 26.00 13.00 6.00 -3.00
NO YRS 72 72 72 64 64 64 64 64 65 65 72 72 64