DIABLO DAM, WASHINGTON

Monthly Extreme Maximum Temperature (Degrees Fahrenheit)

(452157)

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1931 48.00 51.00 58.00 84.00 85.00 90.00 96.00 93.00 75.00 74.00 56.00 ----- z 96.00
1932 45.00 e 50.00 59.00 72.00 81.00 ----- z 89.00 m 93.00 ----- z ----- z ----- z ----- z 93.00
1933 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1934 46.00 56.00 61.00 ----- z 84.00 84.00 90.00 97.00 90.00 75.00 55.00 47.00 97.00
1935 48.00 52.00 52.00 76.00 78.00 87.00 103.00 93.00 89.00 74.00 46.00 43.00 103.00
1936 42.00 38.00 50.00 76.00 93.00 90.00 88.00 94.00 88.00 75.00 60.00 48.00 94.00
1937 35.00 48.00 59.00 62.00 84.00 95.00 91.00 90.00 88.00 71.00 62.00 49.00 95.00
1938 44.00 57.00 56.00 72.00 83.00 92.00 106.00 96.00 92.00 71.00 50.00 53.00 106.00
1939 47.00 49.00 65.00 80.00 93.00 95.00 98.00 98.00 86.00 68.00 56.00 57.00 98.00
1940 49.00 51.00 67.00 77.00 83.00 95.00 91.00 98.00 92.00 72.00 49.00 57.00 98.00
1941 51.00 60.00 71.00 79.00 86.00 93.00 106.00 91.00 79.00 64.00 59.00 56.00 106.00
1942 55.00 53.00 69.00 78.00 82.00 93.00 103.00 95.00 90.00 73.00 57.00 51.00 103.00
1943 50.00 m ----- z 60.00 s 76.00 a 73.00 84.00 a 92.00 96.00 88.00 a 83.00 60.00 e 50.00 a 96.00
1944 50.00 52.00 58.00 75.00 90.00 91.00 a 103.00 95.00 95.00 a 70.00 54.00 55.00 103.00
1945 53.00 60.00 61.00 69.00 86.00 89.00 93.00 98.00 90.00 a 74.00 55.00 a 48.00 98.00
1946 47.00 55.00 67.00 77.00 80.00 86.00 96.00 95.00 86.00 65.00 54.00 47.00 96.00
1947 49.00 58.00 68.00 82.00 90.00 83.00 94.00 85.00 b 87.00 ----- z 49.00 49.00 94.00
1948 47.00 50.00 66.00 74.00 88.00 94.00 89.00 90.00 86.00 70.00 49.00 46.00 94.00
1949 46.00 53.00 58.00 75.00 87.00 90.00 94.00 94.00 90.00 61.00 a 60.00 a 50.00 94.00
1950 48.00 46.00 53.00 72.00 a 79.00 90.00 90.00 94.00 91.00 61.00 60.00 53.00 94.00
1951 44.00 53.00 62.00 79.00 88.00 95.00 102.00 96.00 91.00 74.00 52.00 46.00 102.00
1952 45.00 50.00 62.00 76.00 87.00 86.00 101.00 100.00 90.00 82.00 59.00 49.00 101.00
1953 62.00 55.00 66.00 74.00 90.00 79.00 102.00 96.00 92.00 77.00 57.00 48.00 g 102.00
1954 42.00 z 52.00 60.00 69.00 82.00 81.00 84.00 87.00 81.00 69.00 65.00 53.00 87.00
1955 47.00 46.00 63.00 71.00 70.00 a 95.00 92.00 95.00 100.00 76.00 62.00 49.00 100.00
1956 43.00 46.00 60.00 78.00 91.00 80.00 98.00 97.00 89.00 75.00 58.00 55.00 98.00
1957 45.00 54.00 62.00 85.00 93.00 86.00 87.00 85.00 91.00 81.00 55.00 53.00 93.00
1958 47.00 57.00 70.00 76.00 94.00 97.00 102.00 100.00 94.00 76.00 57.00 55.00 102.00
1959 53.00 52.00 57.00 75.00 89.00 90.00 96.00 99.00 82.00 68.00 60.00 49.00 99.00
1960 51.00 52.00 69.00 76.00 79.00 83.00 100.00 96.00 85.00 76.00 56.00 48.00 100.00
1961 58.00 51.00 49.00 s 64.00 e 90.00 92.00 98.00 99.00 83.00 73.00 54.00 47.00 99.00
1962 53.00 55.00 68.00 82.00 c 71.00 90.00 92.00 88.00 89.00 72.00 64.00 52.00 92.00
1963 47.00 56.00 62.00 75.00 92.00 95.00 83.00 98.00 94.00 73.00 55.00 53.00 98.00
1964 51.00 55.00 68.00 66.00 84.00 86.00 92.00 91.00 80.00 74.00 56.00 46.00 92.00
1965 47.00 54.00 68.00 81.00 85.00 85.00 ----- z 106.00 86.00 71.00 65.00 58.00 106.00
1966 46.00 ----- z 70.00 75.00 92.00 91.00 86.00 97.00 88.00 76.00 58.00 50.00 97.00
1967 47.00 55.00 59.00 64.00 85.00 89.00 90.00 104.00 b 92.00 69.00 58.00 50.00 104.00
1968 51.00 60.00 65.00 75.00 89.00 89.00 92.00 95.00 86.00 71.00 55.00 45.00 95.00
1969 44.00 49.00 64.00 74.00 94.00 94.00 88.00 88.00 90.00 71.00 62.00 45.00 94.00
1970 42.00 58.00 60.00 63.00 85.00 97.00 101.00 94.00 81.00 76.00 60.00 43.00 101.00
1971 49.00 49.00 58.00 76.00 89.00 80.00 96.00 96.00 80.00 73.00 50.00 45.00 96.00
1972 49.00 53.00 63.00 77.00 92.00 85.00 89.00 96.00 92.00 73.00 52.00 53.00 96.00
1973 47.00 60.00 62.00 70.00 96.00 97.00 96.00 98.00 95.00 63.00 51.00 50.00 98.00
1974 58.00 49.00 60.00 70.00 75.00 92.00 91.00 99.00 94.00 73.00 55.00 51.00 99.00
1975 50.00 47.00 e 56.00 67.00 80.00 88.00 98.00 f 94.00 e 92.00 82.00 56.00 51.00 98.00
1976 51.00 52.00 54.00 77.00 84.00 93.00 86.00 82.00 86.00 74.00 59.00 57.00 93.00
1977 51.00 56.00 58.00 90.00 80.00 94.00 91.00 102.00 86.00 69.00 52.00 m 52.00 102.00
1978 45.00 53.00 67.00 70.00 a 87.00 96.00 98.00 105.00 78.00 71.00 55.00 47.00 105.00
1979 46.00 50.00 67.00 79.00 91.00 88.00 98.00 88.00 86.00 78.00 58.00 55.00 98.00
1980 46.00 55.00 56.00 84.00 91.00 82.00 96.00 93.00 82.00 81.00 58.00 58.00 96.00
1981 53.00 56.00 65.00 76.00 85.00 85.00 93.00 105.00 90.00 67.00 59.00 48.00 105.00
1982 46.00 52.00 67.00 77.00 82.00 94.00 99.00 100.00 85.00 70.00 52.00 51.00 100.00
1983 52.00 56.00 62.00 77.00 103.00 89.00 93.00 91.00 81.00 68.00 58.00 43.00 103.00
1984 58.00 52.00 65.00 78.00 85.00 90.00 94.00 93.00 85.00 74.00 47.00 ----- z 94.00
1985 ----- z 51.00 ----- z 75.00 89.00 97.00 100.00 91.00 78.00 69.00 51.00 41.00 100.00
1986 55.00 51.00 70.00 76.00 94.00 100.00 84.00 101.00 88.00 73.00 58.00 44.00 101.00
1987 51.00 52.00 70.00 90.00 93.00 100.00 ----- z 95.00 98.00 80.00 57.00 48.00 100.00
1988 45.00 63.00 67.00 76.00 88.00 92.00 98.00 98.00 101.00 78.00 60.00 53.00 101.00
1989 50.00 50.00 60.00 81.00 81.00 92.00 97.00 89.00 89.00 73.00 56.00 56.00 97.00
1990 48.00 55.00 67.00 76.00 85.00 95.00 97.00 100.00 86.00 72.00 61.00 45.00 100.00
1991 47.00 59.00 64.00 77.00 74.00 84.00 94.00 96.00 85.00 87.00 57.00 46.00 96.00
1992 48.00 61.00 71.00 81.00 90.00 94.00 96.00 98.00 79.00 76.00 51.00 45.00 a 98.00
1993 45.00 51.00 60.00 69.00 92.00 83.00 80.00 97.00 92.00 80.00 51.00 50.00 97.00
1994 51.00 44.00 72.00 78.00 86.00 84.00 100.00 88.00 87.00 73.00 46.00 50.00 100.00
1995 52.00 56.00 71.00 74.00 85.00 97.00 97.00 86.00 94.00 67.00 57.00 49.00 97.00
1996 51.00 54.00 65.00 74.00 76.00 89.00 100.00 98.00 81.00 75.00 54.00 43.00 100.00
1997 50.00 54.00 ----- z 72.00 87.00 84.00 92.00 92.00 ----- z 63.00 58.00 48.00 92.00
1998 46.00 53.00 66.00 85.00 90.00 90.00 102.00 96.00 98.00 78.00 53.00 47.00 102.00
1999 49.00 52.00 65.00 77.00 88.00 92.00 89.00 93.00 87.00 71.00 56.00 47.00 93.00
2000 43.00 49.00 59.00 73.00 77.00 93.00 91.00 89.00 85.00 68.00 55.00 47.00 93.00
2001 49.00 54.00 66.00 78.00 93.00 88.00 90.00 94.00 86.00 76.00 53.00 43.00 94.00
2002 46.00 51.00 58.00 73.00 81.00 93.00 91.00 93.00 86.00 70.00 55.00 47.00 93.00
2003 55.00 52.00 57.00 73.00 84.00 94.00 101.00 95.00 96.00 80.00 53.00 47.00 101.00
2004 47.00 55.00 75.00 84.00 83.00 92.00 100.00 97.00 85.00 75.00 55.00 53.00 100.00
2005 52.00 59.00 67.00 81.00 93.00 78.00 91.00 94.00 82.00 65.00 55.00 52.00 94.00
2006 49.00 53.00 65.00 79.00 93.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 93.00
Period of Record Statistics
MEAN 48.65 52.99 63.21 75.73 86.09 89.93 94.56 94.84 87.79 72.86 55.85 49.53 98.26
S.D. 4.28 4.22 5.28 5.52 6.19 5.18 5.73 4.79 5.41 5.19 4.19 4.14 3.82
SKEW 0.34 -0.37 -0.21 -0.07 -0.35 -0.33 -0.16 -0.18 0.07 0.02 -0.21 0.22 0.18
MAX 62.00 63.00 75.00 90.00 103.00 100.00 106.00 106.00 101.00 87.00 65.00 58.00 106.00
MIN 35.00 38.00 50.00 62.00 70.00 78.00 80.00 82.00 75.00 61.00 46.00 41.00 92.00
NO YRS 72 73 71 74 75 73 70 74 72 72 72 70 58