WEST YELLOWSTONE, MONTANA

Monthly Total Cooling Degree Days

(248857)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 199603
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.
Months with 5 missing days or less use mean for missing day(s)
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
1924 0.00 a 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.15 d 0.00 c 0.00 c 0.00 b 1.15
1925 0.00 c 0.00 d 0.00 f 0.00 l 0.00 f 0.00 p 6.50 0.00 0.00 a 0.00 0.00 b 0.00 b 6.50
1926 0.00 e 0.00 d 0.00 b 0.00 f 0.00 1.61 b 2.00 0.00 0.00 b 0.00 0.00 0.00 g 3.61
1927 0.00 e 0.00 i 0.00 f 0.00 k 0.00 c 6.00 3.00 0.00 a 0.00 0.00 a 0.00 0.00 c 9.00
1928 0.00 g 0.00 l 0.00 0.00 d 0.00 0.00 a 4.28 b 0.00 0.00 b 0.00 b 0.00 a 0.00 4.28
1929 0.00 k 0.00 c 0.00 d 0.00 c 0.00 d 0.00 20.00 4.50 0.00 g 0.00 b 0.00 0.00 24.50
1930 0.00 0.00 f 0.00 f 0.00 d 0.00 z 0.00 8.50 0.00 0.00 0.00 0.00 0.00 e 8.50
1931 0.00 c 0.00 c 0.00 j 0.00 0.00 o 0.00 z 27.90 a 1.50 0.00 n 0.00 b 0.00 0.00 29.40
1932 0.00 0.00 0.00 a 0.00 0.00 0.00 c 0.00 e 5.00 0.00 0.00 a 0.00 0.00 5.00
1933 0.00 0.00 0.00 0.00 0.00 0.00 b 18.71 b 2.07 a 2.50 0.00 b 0.00 b 0.00 23.27
1934 0.00 0.00 0.00 0.00 0.00 0.00 11.00 3.00 0.00 0.00 0.00 0.00 14.00
1935 0.00 0.00 0.00 0.00 0.00 0.00 1.00 0.00 0.00 0.00 0.00 0.00 e 1.00
1936 0.00 0.00 0.00 h 0.00 0.00 7.50 52.50 6.00 0.00 a 0.00 0.00 b 0.00 c 66.00
1937 0.00 g 0.00 g 0.00 f 0.00 j 0.00 c 2.59 a 4.00 1.55 a 0.00 a 0.00 c 0.00 d 0.00 d 8.14
1938 0.00 g 0.00 f 0.00 f 0.00 a 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1939 0.00 0.00 0.00 0.00 0.00 0.00 20.50 0.00 0.00 0.00 a 0.00 0.00 20.50
1940 0.00 0.00 0.00 0.00 0.00 0.00 9.50 0.00 0.00 0.00 0.00 0.00 9.50
1941 0.00 0.00 0.00 0.00 0.00 d 0.00 3.50 4.00 0.00 0.00 0.00 0.00 7.50
1942 0.00 0.00 0.00 0.00 0.00 0.00 4.00 0.00 0.00 0.00 0.00 0.00 4.00
1943 0.00 0.00 0.00 0.00 0.00 0.00 a 4.50 0.50 0.00 0.00 0.00 f 0.00 5.00
1944 0.00 0.00 a 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1945 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1946 0.00 0.00 0.00 0.00 0.00 0.00 1.00 0.00 0.00 0.00 0.00 b 0.00 1.00
1947 0.00 0.00 0.00 a 0.00 l 0.00 z 0.00 l 7.50 3.00 0.50 0.00 0.00 0.00 11.00
1948 0.00 0.00 0.00 z 0.00 i 0.00 a 0.00 a 0.00 a 0.00 0.00 0.00 0.00 0.00 0.00
1949 0.00 0.00 a 0.00 a 0.00 0.00 0.00 0.00 5.00 0.00 a 0.00 0.00 b 0.00 f 5.00
1950 0.00 b 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1951 0.00 0.00 0.00 0.00 0.00 a 0.00 1.00 0.00 0.00 a 0.00 0.00 0.00 1.00
1952 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 a 0.00 c 0.50
1953 0.00 0.00 0.00 a 0.00 0.00 0.00 18.50 0.00 0.00 a 0.00 a 0.00 0.00 18.50
1954 0.00 0.00 0.00 d 0.00 0.00 1.00 18.50 1.50 0.00 0.00 0.00 0.00 21.00
1955 0.00 0.00 0.00 0.00 0.00 0.00 23.50 6.00 0.00 0.00 b 0.00 0.00 29.50
1956 0.00 0.00 0.00 0.00 0.00 0.00 5.00 0.00 0.00 0.00 0.00 0.00 5.00
1957 0.00 0.00 0.00 0.00 0.00 0.00 0.50 1.00 0.00 0.00 0.00 0.00 1.50
1958 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 0.00 1.50
1959 0.00 0.00 0.00 0.00 0.00 0.00 1.00 5.00 0.00 0.00 0.00 0.00 6.00
1960 0.00 0.00 0.00 0.00 0.00 0.00 29.00 5.50 0.00 0.00 0.00 0.00 34.50
1961 0.00 0.00 0.00 0.00 0.00 0.00 6.50 16.50 0.00 0.00 0.00 0.00 23.00
1962 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1963 0.00 0.00 0.00 0.00 0.00 0.00 8.00 7.00 0.00 0.00 0.00 0.00 15.00
1964 0.00 0.00 0.00 0.00 0.00 0.00 2.50 2.00 0.00 0.00 0.00 0.00 4.50
1965 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 0.00 3.50
1966 0.00 0.00 0.00 0.00 0.00 0.00 12.50 0.00 0.00 0.00 0.00 0.00 12.50
1967 0.00 0.00 0.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 0.00 0.00 3.50
1968 0.00 0.00 0.00 0.00 0.00 0.00 4.00 6.50 0.00 0.00 0.00 0.00 10.50
1969 0.00 0.00 0.00 0.00 0.00 0.00 1.00 6.20 a 0.00 0.00 0.00 0.00 7.20
1970 0.00 0.00 0.00 0.00 0.00 6.00 11.00 12.50 0.00 0.00 0.00 0.00 29.50
1971 0.00 0.00 0.00 0.00 0.00 0.00 6.00 21.00 0.00 0.00 0.00 0.00 27.00
1972 0.00 0.00 0.00 0.00 0.00 0.00 0.50 2.50 0.00 0.00 0.00 0.00 3.00
1973 0.00 0.00 0.00 0.00 c 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1974 0.00 0.00 s 0.00 c 0.00 0.00 6.00 7.50 0.00 0.00 0.00 0.00 a 0.00 13.50
1975 0.00 0.00 0.00 0.00 0.00 0.00 15.00 0.00 0.00 0.00 0.00 0.00 15.00
1976 0.00 0.00 0.00 0.00 0.00 0.00 3.00 0.00 0.00 0.00 0.00 q 0.00 3.00
1977 0.00 0.00 0.00 d 0.00 a 0.00 0.50 7.00 1.00 0.00 0.00 c 0.00 0.00 8.50
1978 0.00 0.00 0.00 0.00 0.00 0.50 1.00 2.00 0.00 0.00 b 0.00 n 0.00 l 3.50
1979 0.00 j 0.00 h 0.00 z 0.00 x 0.00 2.50 1.00 7.00 0.00 0.00 0.00 0.00 10.50
1980 0.00 a 0.00 z 0.00 p 0.00 x 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1981 0.00 0.00 0.00 a 0.00 0.00 2.50 2.00 0.00 0.00 0.00 0.00 0.00 4.50
1982 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.00 0.00 0.00 0.00 0.00 3.00
1983 0.00 0.00 0.00 0.00 0.00 0.00 2.00 15.50 0.00 0.00 0.00 0.00 17.50
1984 0.00 0.00 0.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 a 0.00 0.00 2.50
1985 0.00 0.00 0.00 0.00 0.00 0.00 4.00 0.00 0.00 0.00 0.00 l 0.00 4.00
1986 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 0.00 a 0.00 0.00
1987 0.00 0.00 0.00 0.00 0.00 0.00 2.00 0.00 0.00 0.00 0.00 0.00 2.00
1988 0.00 0.00 0.00 0.00 0.00 13.50 7.00 0.50 0.00 0.00 0.00 0.00 21.00
1989 0.00 0.00 0.00 0.00 i 0.00 0.00 16.00 2.50 0.00 0.00 0.00 0.00 18.50
1990 0.00 0.00 0.00 0.00 0.00 5.50 3.00 2.50 0.00 0.00 0.00 0.00 b 11.00
1991 0.00 b 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 6.50 0.00 0.00 0.00 0.00 6.50
1992 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 l 0.00 0.00 0.00 0.00 0.00
1993 0.00 m 0.00 o 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 a 0.00 0.00 i 0.00
1994 0.00 a 0.00 0.00 0.00 0.00 0.00 o 3.50 9.00 0.00 0.00 0.00 a 0.00 a 12.50
1995 0.00 0.00 0.00 0.00 0.00 0.00 4.50 6.00 0.00 z 0.00 0.00 0.00 10.50
1996 0.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
Period of Record Statistics
MEAN 0.00 0.00 0.00 0.00 0.00 0.83 6.24 2.68 0.06 0.00 0.00 0.00 9.56
S.D. 0.00 0.00 0.00 0.00 0.00 2.32 9.02 4.20 0.34 0.00 0.00 0.00 9.63
SKEW 0.00 0.00 0.00 0.00 0.00 3.48 2.60 2.32 6.28 0.00 0.00 0.00 0.94
MAX 0.00 0.00 0.00 0.00 0.00 13.50 52.50 21.00 2.50 0.00 0.00 0.00 34.50
MIN 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
NO YRS 67 63 62 62 67 67 71 71 68 72 68 68 45