HEADWORKS PORTLAND W,

Monthly Extreme Maximum Temperature (Degrees Fahrenheit)

(353770)

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
1899 ----- z ----- z ----- z 68.00 66.00 78.00 92.00 77.00 82.00 66.00 57.00 50.00 92.00
1900 52.00 49.00 67.00 75.00 72.00 87.00 88.00 72.00 76.00 64.00 55.00 53.00 a 88.00
1901 47.00 67.00 a 62.00 d 65.00 75.00 a 84.00 79.00 87.00 ----- z 67.00 59.00 51.00 87.00
1902 50.00 53.00 79.00 b ----- z ----- z 81.00 89.00 92.00 81.00 69.00 50.00 57.00 a 92.00
1903 51.00 52.00 ----- z ----- z ----- z 92.00 84.00 78.00 80.00 ----- z ----- z 48.00 92.00
1904 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 50.00 50.00
1905 ----- z ----- z ----- z 80.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 80.00
1906 ----- z ----- z ----- z ----- z 85.00 93.00 105.00 95.00 84.00 82.00 66.00 57.00 105.00
1907 49.00 60.00 f 66.00 76.00 90.00 92.00 102.00 90.00 96.00 79.00 65.00 56.00 102.00
1908 55.00 62.00 65.00 81.00 75.00 92.00 95.00 99.00 87.00 78.00 64.00 52.00 99.00
1909 50.00 51.00 70.00 77.00 86.00 90.00 85.00 87.00 90.00 76.00 59.00 48.00 90.00
1910 52.00 50.00 75.00 87.00 86.00 98.00 a 100.00 92.00 86.00 70.00 69.00 58.00 100.00
1911 54.00 55.00 79.00 80.00 83.00 85.00 104.00 94.00 80.00 77.00 58.00 47.00 104.00
1912 50.00 59.00 69.00 69.00 92.00 94.00 99.00 82.00 87.00 76.00 d 71.00 58.00 99.00
1913 53.00 57.00 74.00 75.00 b ----- z 94.00 95.00 96.00 88.00 77.00 74.00 52.00 96.00
1914 54.00 57.00 73.00 71.00 88.00 91.00 95.00 97.00 87.00 78.00 72.00 50.00 97.00
1915 55.00 57.00 79.00 80.00 82.00 95.00 99.00 100.00 87.00 78.00 58.00 50.00 100.00
1916 49.00 62.00 71.00 73.00 79.00 91.00 88.00 98.00 87.00 75.00 57.00 49.00 98.00
1917 49.00 59.00 61.00 65.00 74.00 90.00 103.00 96.00 85.00 84.00 65.00 60.00 103.00
1918 56.00 59.00 77.00 82.00 79.00 94.00 92.00 97.00 97.00 76.00 58.00 58.00 97.00
1919 57.00 50.00 73.00 74.00 82.00 81.00 105.00 97.00 86.00 77.00 59.00 51.00 105.00
1920 57.00 63.00 65.00 75.00 84.00 95.00 95.00 101.00 82.00 ----- z 65.00 56.00 101.00
1921 52.00 66.00 70.00 74.00 84.00 83.00 88.00 93.00 80.00 83.00 67.00 58.00 a 93.00
1922 45.00 60.00 64.00 73.00 95.00 96.00 105.00 97.00 96.00 78.00 56.00 46.00 105.00
1923 52.00 62.00 82.00 84.00 85.00 100.00 91.00 98.00 95.00 89.00 67.00 55.00 100.00
1924 54.00 60.00 62.00 82.00 90.00 99.00 103.00 90.00 a 97.00 73.00 54.00 55.00 103.00
1925 54.00 58.00 66.00 83.00 90.00 100.00 93.00 101.00 89.00 78.00 59.00 56.00 101.00
1926 54.00 67.00 77.00 93.00 87.00 94.00 103.00 92.00 90.00 78.00 68.00 61.00 103.00
1927 55.00 56.00 68.00 81.00 83.00 92.00 106.00 99.00 79.00 75.00 66.00 53.00 106.00
1928 48.00 61.00 c 70.00 75.00 95.00 81.00 97.00 91.00 b 89.00 74.00 62.00 55.00 97.00
1929 50.00 49.00 67.00 75.00 95.00 92.00 98.00 97.00 93.00 78.00 67.00 56.00 98.00
1930 48.00 63.00 84.00 82.00 80.00 100.00 98.00 97.00 99.00 70.00 70.00 53.00 100.00
1931 59.00 60.00 70.00 87.00 94.00 92.00 102.00 96.00 88.00 78.00 68.00 49.00 102.00
1932 55.00 67.00 70.00 74.00 79.00 94.00 85.00 98.00 94.00 87.00 60.00 54.00 98.00
1933 53.00 48.00 62.00 77.00 79.00 87.00 99.00 101.00 79.00 84.00 63.00 58.00 101.00
1934 57.00 63.00 77.00 85.00 90.00 85.00 87.00 95.00 94.00 84.00 b 66.00 57.00 95.00
1935 57.00 a 61.00 62.00 73.00 81.00 98.00 110.00 101.00 94.00 84.00 56.00 54.00 110.00
1936 52.00 55.00 69.00 85.00 93.00 a 85.00 85.00 91.00 89.00 85.00 66.00 58.00 93.00
1937 41.00 54.00 64.00 65.00 80.00 95.00 91.00 96.00 99.00 81.00 62.00 58.00 99.00
1938 53.00 62.00 66.00 75.00 88.00 92.00 105.00 85.00 96.00 86.00 56.00 a 55.00 105.00
1939 52.00 57.00 75.00 85.00 97.00 82.00 100.00 107.00 89.00 76.00 66.00 53.00 107.00
1940 61.00 a 58.00 72.00 80.00 94.00 95.00 88.00 96.00 87.00 79.00 57.00 60.00 96.00
1941 58.00 61.00 78.00 78.00 90.00 95.00 108.00 99.00 77.00 71.00 69.00 57.00 108.00
1942 59.00 55.00 76.00 79.00 85.00 101.00 105.00 96.00 93.00 81.00 59.00 52.00 105.00
1943 53.00 64.00 67.00 81.00 81.00 89.00 90.00 a 88.00 92.00 81.00 62.00 55.00 92.00
1944 55.00 54.00 70.00 81.00 94.00 87.00 101.00 95.00 103.00 77.00 57.00 55.00 103.00
1945 55.00 61.00 59.00 72.00 88.00 92.00 100.00 99.00 91.00 83.00 61.00 60.00 100.00
1946 50.00 63.00 67.00 80.00 85.00 91.00 104.00 95.00 84.00 68.00 55.00 56.00 104.00
1947 51.00 63.00 81.00 84.00 92.00 82.00 a 85.00 86.00 88.00 a 66.00 60.00 53.00 92.00
1948 51.00 64.00 74.00 72.00 87.00 93.00 92.00 82.00 92.00 72.00 51.00 49.00 93.00
1949 40.00 58.00 60.00 a 77.00 85.00 87.00 92.00 90.00 a 94.00 65.00 79.00 56.00 94.00
1950 44.00 54.00 59.00 79.00 86.00 90.00 92.00 95.00 90.00 72.00 62.00 57.00 95.00
1951 50.00 58.00 65.00 a 81.00 86.00 96.00 93.00 a 102.00 92.00 79.00 57.00 51.00 a 102.00
1952 54.00 59.00 a 69.00 79.00 87.00 80.00 100.00 104.00 95.00 90.00 62.00 52.00 104.00
1953 60.00 56.00 73.00 71.00 87.00 74.00 92.00 98.00 92.00 80.00 60.00 54.00 98.00
1954 49.00 60.00 64.00 77.00 88.00 a 84.00 82.00 a 83.00 a 88.00 72.00 b 68.00 54.00 a 88.00
1955 52.00 58.00 62.00 74.00 a 79.00 a 92.00 88.00 c 88.00 97.00 a 76.00 a 62.00 55.00 97.00
1956 50.00 47.00 68.00 85.00 a 93.00 82.00 106.00 a 91.00 83.00 79.00 61.00 54.00 106.00
1957 45.00 60.00 64.00 89.00 83.00 82.00 87.00 88.00 99.00 76.00 a 63.00 58.00 99.00
1958 59.00 67.00 65.00 78.00 90.00 95.00 105.00 95.00 100.00 89.00 65.00 60.00 105.00
1959 54.00 61.00 69.00 74.00 85.00 89.00 96.00 91.00 86.00 79.00 68.00 57.00 96.00
1960 55.00 58.00 79.00 76.00 77.00 85.00 98.00 96.00 92.00 88.00 61.00 56.00 98.00
1961 60.00 60.00 64.00 69.00 85.00 104.00 101.00 99.00 82.00 84.00 60.00 56.00 104.00
1962 62.00 64.00 68.00 78.00 65.00 85.00 91.00 87.00 89.00 80.00 67.00 a 62.00 91.00
1963 54.00 64.00 69.00 73.00 88.00 91.00 84.00 89.00 93.00 75.00 57.00 60.00 93.00
1964 52.00 63.00 75.00 68.00 78.00 82.00 90.00 89.00 83.00 82.00 58.00 59.00 90.00
1965 59.00 64.00 71.00 79.00 78.00 87.00 100.00 92.00 83.00 83.00 64.00 58.00 a 100.00
1966 52.00 59.00 73.00 77.00 84.00 90.00 86.00 91.00 90.00 80.00 71.00 56.00 91.00
1967 53.00 60.00 63.00 64.00 84.00 87.00 96.00 98.00 92.00 76.00 63.00 51.00 98.00
1968 58.00 74.00 69.00 81.00 77.00 89.00 93.00 90.00 91.00 76.00 60.00 54.00 93.00
1969 52.00 52.00 74.00 71.00 88.00 85.00 85.00 83.00 91.00 73.00 68.00 54.00 91.00
1970 58.00 67.00 64.00 68.00 87.00 95.00 97.00 95.00 85.00 86.00 66.00 52.00 97.00
1971 60.00 66.00 63.00 78.00 87.00 84.00 94.00 95.00 82.00 84.00 59.00 52.00 95.00
1972 51.00 57.00 72.00 73.00 93.00 83.00 94.00 100.00 92.00 82.00 60.00 56.00 100.00
1973 55.00 65.00 67.00 72.00 89.00 92.00 95.00 86.00 92.00 72.00 55.00 52.00 95.00
1974 57.00 56.00 67.00 74.00 78.00 93.00 90.00 89.00 92.00 84.00 66.00 56.00 93.00
1975 57.00 60.00 59.00 70.00 86.00 87.00 92.00 83.00 92.00 84.00 69.00 60.00 92.00
1976 60.00 66.00 62.00 80.00 83.00 87.00 93.00 83.00 a 85.00 82.00 68.00 60.00 93.00
1977 61.00 72.00 64.00 79.00 71.00 88.00 90.00 105.00 86.00 75.00 a 61.00 63.00 105.00
1978 53.00 c 67.00 73.00 73.00 83.00 90.00 96.00 101.00 83.00 80.00 63.00 52.00 101.00
1979 46.00 55.00 72.00 80.00 84.00 88.00 99.00 85.00 96.00 85.00 64.00 55.00 99.00
1980 54.00 63.00 66.00 81.00 78.00 76.00 102.00 90.00 90.00 90.00 73.00 63.00 a 102.00
1981 62.00 a 63.00 70.00 85.00 80.00 85.00 90.00 102.00 99.00 76.00 70.00 57.00 102.00
1982 53.00 62.00 66.00 79.00 85.00 95.00 85.00 95.00 90.00 78.00 61.00 58.00 95.00
1983 59.00 62.00 63.00 78.00 99.00 84.00 89.00 88.00 84.00 72.00 61.00 50.00 99.00
1984 63.00 63.00 72.00 80.00 90.00 88.00 95.00 90.00 84.00 82.00 60.00 52.00 95.00
1985 57.00 62.00 68.00 80.00 82.00 98.00 98.00 91.00 80.00 77.00 59.00 51.00 a 98.00
1986 56.00 69.00 72.00 78.00 90.00 92.00 85.00 96.00 91.00 82.00 69.00 54.00 96.00
1987 54.00 65.00 76.00 85.00 94.00 96.00 92.00 103.00 ----- z 94.00 70.00 58.00 103.00
1988 55.00 72.00 72.00 82.00 90.00 91.00 98.00 99.00 104.00 89.00 58.00 59.00 104.00
1989 53.00 54.00 66.00 82.00 80.00 93.00 85.00 85.00 92.00 77.00 62.00 59.00 93.00
1990 60.00 69.00 70.00 85.00 90.00 93.00 99.00 102.00 94.00 70.00 66.00 55.00 102.00
1991 59.00 69.00 76.00 74.00 75.00 82.00 98.00 90.00 94.00 94.00 68.00 55.00 98.00
1992 59.00 67.00 73.00 84.00 95.00 102.00 100.00 98.00 91.00 75.00 63.00 50.00 102.00
1993 59.00 65.00 64.00 71.00 89.00 86.00 85.00 96.00 91.00 92.00 63.00 59.00 96.00
1994 62.00 58.00 82.00 79.00 86.00 83.00 101.00 94.00 94.00 80.00 53.00 55.00 101.00
1995 58.00 69.00 74.00 77.00 86.00 96.00 97.00 90.00 88.00 75.00 67.00 58.00 97.00
1996 60.00 68.00 73.00 81.00 79.00 92.00 102.00 102.00 93.00 89.00 63.00 53.00 102.00
1997 54.00 65.00 70.00 75.00 88.00 ----- z 94.00 92.00 92.00 76.00 72.00 53.00 94.00
1998 58.00 62.00 73.00 88.00 85.00 84.00 98.00 99.00 92.00 82.00 60.00 56.00 99.00
1999 56.00 54.00 71.00 80.00 87.00 87.00 92.00 92.00 94.00 84.00 65.00 60.00 94.00
2000 51.00 57.00 70.00 76.00 76.00 95.00 92.00 91.00 89.00 77.00 62.00 53.00 95.00
2001 57.00 60.00 70.00 78.00 96.00 85.00 86.00 96.00 83.00 81.00 65.00 51.00 96.00
2002 52.00 61.00 63.00 76.00 82.00 93.00 96.00 100.00 87.00 80.00 66.00 54.00 100.00
2003 62.00 61.00 72.00 66.00 87.00 97.00 95.00 95.00 92.00 77.00 59.00 51.00 97.00
2004 60.00 55.00 77.00 85.00 76.00 87.00 100.00 89.00 84.00 78.00 61.00 55.00 100.00
2005 57.00 66.00 75.00 72.00 94.00 81.00 93.00 92.00 81.00 70.00 58.00 57.00 94.00
2006 59.00 56.00 63.00 79.00 94.00 101.00 105.00 92.00 95.00 74.00 65.00 58.00 105.00
2007 56.00 60.00 70.00 78.00 85.00 f 85.00 f 97.00 g 94.00 89.00 66.00 64.00 50.00 l 97.00
2008 51.00 62.00 63.00 79.00 90.00 97.00 92.00 98.00 88.00 72.00 62.00 54.00 98.00
2009 53.00 58.00 56.00 77.00 83.00 84.00 101.00 92.00 91.00 70.00 63.00 50.00 101.00
2010 57.00 58.00 68.00 73.00 73.00 78.00 94.00 95.00 84.00 77.00 68.00 56.00 95.00
2011 54.00 52.00 54.00 68.00 70.00 80.00 83.00 93.00 91.00 71.00 57.00 b 54.00 93.00
2012 56.00 54.00 61.00 77.00 88.00 78.00 81.00 96.00 91.00 a 79.00 62.00 52.00 96.00
2013 49.00 61.00 75.00 a ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 75.00
Period of Record Statistics
MEAN 54.24 60.21 69.22 77.30 84.91 89.55 94.71 93.45 89.39 78.38 62.82 54.86 98.51
S.D. 4.53 5.45 5.94 5.64 6.75 6.25 6.85 6.18 5.64 6.33 5.15 3.56 4.64
SKEW -0.48 -0.09 0.09 -0.11 -0.48 -0.09 -0.05 -0.64 -0.04 0.10 0.18 -0.07 0.06
MAX 63.00 74.00 84.00 93.00 99.00 104.00 110.00 107.00 104.00 94.00 79.00 63.00 110.00
MIN 40.00 47.00 54.00 64.00 65.00 74.00 79.00 72.00 76.00 64.00 50.00 46.00 88.00
NO YRS 111 110 110 110 108 110 111 112 110 110 111 112 99