COULEE DAM 1 SW, WASHINGTON

Monthly Extreme Maximum Temperature (Degrees Fahrenheit)

(451767)

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
1948 ----- z ----- z ----- z ----- z ----- z 94.00 91.00 90.00 92.00 69.00 53.00 53.00 94.00
1949 38.00 56.00 60.00 78.00 91.00 95.00 99.00 98.00 95.00 a 67.00 61.00 48.00 99.00
1950 43.00 46.00 56.00 72.00 f 80.00 92.00 99.00 ----- z 96.00 68.00 52.00 48.00 99.00
1951 46.00 53.00 57.00 74.00 88.00 89.00 100.00 97.00 a 88.00 73.00 53.00 51.00 100.00
1952 40.00 49.00 64.00 84.00 86.00 91.00 99.00 98.00 a 94.00 83.00 54.00 45.00 99.00
1953 53.00 53.00 63.00 72.00 82.00 83.00 96.00 99.00 92.00 75.00 62.00 48.00 99.00
1954 51.00 55.00 60.00 74.00 89.00 84.00 95.00 95.00 85.00 69.00 57.00 47.00 95.00
1955 39.00 45.00 52.00 67.00 78.00 97.00 102.00 95.00 96.00 67.00 59.00 43.00 102.00
1956 45.00 44.00 57.00 81.00 91.00 86.00 101.00 99.00 88.00 76.00 52.00 53.00 a 101.00
1957 35.00 56.00 58.00 84.00 88.00 91.00 93.00 92.00 91.00 72.00 54.00 50.00 a 93.00
1958 49.00 58.00 60.00 72.00 95.00 100.00 100.00 99.00 93.00 81.00 58.00 53.00 100.00
1959 50.00 45.00 59.00 71.00 85.00 90.00 102.00 98.00 89.00 67.00 61.00 54.00 102.00
1960 45.00 47.00 71.00 76.00 82.00 90.00 108.00 100.00 91.00 77.00 58.00 44.00 108.00
1961 50.00 57.00 65.00 69.00 88.00 100.00 101.00 110.00 84.00 77.00 52.00 47.00 110.00
1962 45.00 54.00 66.00 80.00 76.00 94.00 101.00 96.00 90.00 77.00 58.00 46.00 101.00
1963 46.00 55.00 63.00 69.00 87.00 97.00 93.00 97.00 94.00 81.00 55.00 43.00 97.00
1964 43.00 48.00 68.00 67.00 83.00 89.00 101.00 92.00 85.00 75.00 55.00 42.00 101.00
1965 44.00 47.00 61.00 76.00 86.00 90.00 100.00 100.00 84.00 78.00 63.00 47.00 100.00
1966 43.00 49.00 72.00 73.00 93.00 88.00 96.00 103.00 93.00 75.00 59.00 48.00 103.00
1967 53.00 57.00 56.00 64.00 85.00 95.00 100.00 103.00 93.00 74.00 54.00 47.00 103.00
1968 48.00 58.00 66.00 82.00 84.00 94.00 105.00 98.00 88.00 71.00 53.00 54.00 105.00
1969 42.00 41.00 67.00 77.00 87.00 98.00 98.00 99.00 92.00 66.00 a 56.00 48.00 99.00
1970 48.00 49.00 58.00 62.00 85.00 97.00 98.00 100.00 92.00 80.00 53.00 47.00 100.00
1971 57.00 53.00 59.00 70.00 86.00 92.00 100.00 104.00 83.00 78.00 52.00 44.00 104.00
1972 48.00 60.00 68.00 74.00 90.00 91.00 96.00 103.00 87.00 75.00 51.00 55.00 103.00
1973 45.00 52.00 62.00 73.00 94.00 102.00 99.00 97.00 94.00 69.00 53.00 48.00 102.00
1974 49.00 50.00 62.00 70.00 77.00 97.00 100.00 98.00 94.00 74.00 54.00 50.00 c 100.00
1975 44.00 45.00 52.00 73.00 83.00 87.00 105.00 92.00 88.00 80.00 68.00 55.00 105.00
1976 50.00 50.00 62.00 71.00 82.00 92.00 96.00 90.00 93.00 82.00 57.00 45.00 96.00
1977 42.00 59.00 63.00 91.00 81.00 94.00 96.00 103.00 83.00 69.00 60.00 50.00 103.00
1978 42.00 47.00 66.00 72.00 80.00 b 94.00 a 97.00 a 100.00 85.00 a 72.00 57.00 43.00 h 100.00
1979 35.00 52.00 68.00 77.00 86.00 96.00 105.00 96.00 90.00 80.00 55.00 49.00 a 105.00
1980 45.00 47.00 a 60.00 81.00 86.00 a 87.00 100.00 92.00 88.00 83.00 a 60.00 58.00 100.00
1981 61.00 59.00 65.00 85.00 82.00 88.00 96.00 101.00 95.00 68.00 62.00 48.00 101.00
1982 45.00 59.00 62.00 74.00 84.00 96.00 100.00 97.00 88.00 70.00 52.00 53.00 100.00
1983 50.00 54.00 59.00 73.00 97.00 86.00 i 97.00 97.00 85.00 69.00 59.00 43.00 97.00
1984 48.00 49.00 66.00 74.00 86.00 89.00 103.00 99.00 89.00 79.00 56.00 40.00 103.00
1985 37.00 47.00 57.00 77.00 90.00 96.00 107.00 92.00 86.00 71.00 59.00 40.00 107.00
1986 44.00 55.00 66.00 74.00 100.00 100.00 96.00 100.00 85.00 73.00 55.00 42.00 100.00
1987 44.00 50.00 67.00 85.00 95.00 98.00 ----- z ----- z 98.00 a 82.00 57.00 53.00 98.00
1988 43.00 60.00 61.00 82.00 89.00 94.00 98.00 102.00 103.00 a 84.00 61.00 46.00 103.00
1989 51.00 43.00 57.00 74.00 80.00 92.00 96.00 100.00 85.00 74.00 69.00 42.00 100.00
1990 51.00 57.00 68.00 73.00 85.00 89.00 101.00 99.00 91.00 72.00 64.00 51.00 101.00
1991 44.00 56.00 69.00 76.00 74.00 83.00 97.00 97.00 89.00 81.00 54.00 49.00 97.00
1992 52.00 54.00 71.00 76.00 90.00 102.00 99.00 99.00 85.00 83.00 52.00 39.00 102.00
1993 40.00 42.00 58.00 66.00 ----- z 88.00 89.00 92.00 90.00 81.00 58.00 49.00 92.00
1994 46.00 50.00 73.00 80.00 86.00 93.00 104.00 99.00 88.00 74.00 48.00 52.00 104.00
1995 46.00 61.00 67.00 70.00 87.00 88.00 97.00 93.00 93.00 67.00 61.00 50.00 97.00
1996 46.00 49.00 61.00 76.00 77.00 88.00 100.00 99.00 91.00 76.00 52.00 42.00 100.00
1997 46.00 46.00 64.00 67.00 85.00 87.00 92.00 99.00 91.00 71.00 58.00 48.00 99.00
1998 ----- z 52.00 65.00 83.00 85.00 ----- z 103.00 104.00 97.00 79.00 59.00 50.00 104.00
1999 52.00 51.00 70.00 76.00 89.00 94.00 98.00 99.00 86.00 71.00 62.00 50.00 99.00
2000 43.00 51.00 62.00 73.00 80.00 ----- z 100.00 100.00 90.00 71.00 53.00 36.00 100.00
2001 43.00 42.00 64.00 77.00 94.00 91.00 98.00 100.00 90.00 75.00 59.00 46.00 100.00
2002 51.00 56.00 60.00 70.00 77.00 96.00 103.00 98.00 89.00 75.00 54.00 53.00 103.00
2003 53.00 53.00 65.00 73.00 89.00 94.00 104.00 102.00 97.00 84.00 61.00 ----- z 104.00
2004 ----- z ----- z ----- z 80.00 d 81.00 100.00 102.00 104.00 91.00 79.00 58.00 54.00 104.00
2005 50.00 57.00 66.00 80.00 93.00 100.00 ----- z 99.00 88.00 74.00 ----- z 44.00 100.00
2006 50.00 52.00 62.00 a 76.00 92.00 98.00 c 96.00 k ----- z ----- z ----- z ----- z ----- z 98.00
Period of Record Statistics
MEAN 46.23 51.61 62.91 74.98 85.98 92.86 99.14 98.29 90.17 74.88 56.88 47.86 101.09
S.D. 5.10 5.20 4.79 5.69 5.56 4.81 3.82 3.89 4.20 5.15 4.25 4.61 3.20
SKEW 0.15 -0.13 -0.07 0.28 0.13 -0.04 -0.16 -0.04 0.43 0.08 0.56 -0.23 0.24
MAX 61.00 61.00 73.00 91.00 100.00 102.00 108.00 110.00 103.00 84.00 69.00 58.00 110.00
MIN 35.00 41.00 52.00 62.00 74.00 83.00 89.00 90.00 83.00 66.00 48.00 36.00 93.00
NO YRS 56 57 57 57 57 56 56 56 58 58 57 56 47