HAMILTON, MONTANA

Monthly Total Cooling Degree Days

(243885)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200410
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
1895 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 64.00 k 89.00 171.00 0.00 0.00 g 0.00 0.00 z 260.00
1896 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 z 0.00 z 0.00 z 0.00
1897 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 z 0.00 z 0.00 z 0.00
1898 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 52.50 q 1.50 0.00 0.00 1.50
1899 0.00 0.00 0.00 0.50 3.50 16.00 6.00 z 30.00 f 68.00 0.00 0.00 0.00 88.00
1900 0.00 0.00 0.00 0.00 0.00 64.50 74.29 b 29.50 2.00 0.00 0.00 a 0.00 170.29
1901 0.00 0.00 0.00 0.00 5.50 24.50 269.50 325.00 399.50 345.00 0.00 z 0.00 z 1369.00
1902 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 z 0.00 0.00 0.00
1903 0.00 0.00 0.00 0.00 6.00 14.50 29.50 69.00 1.50 0.00 0.00 0.00 120.50
1904 0.00 0.00 0.00 0.00 0.00 9.00 85.00 90.00 14.50 0.00 0.00 0.00 198.50
1905 0.00 0.00 0.00 0.00 2.00 1.00 93.50 73.50 8.50 0.00 0.00 c 0.00 z 178.50
1906 0.00 b 0.00 0.00 0.00 11.50 0.50 149.00 60.00 8.00 0.00 0.00 f 0.00 u 229.00
1907 0.00 0.00 0.00 0.00 1.00 6.00 30.50 20.50 0.00 s 0.00 0.00 0.00 d 58.00
1908 0.00 0.00 0.00 0.00 0.00 1.00 94.50 42.00 i 23.04 b 0.00 0.00 b 0.00 a 118.54
1909 0.00 0.00 0.00 0.00 a 0.00 29.00 73.50 79.50 5.00 f 0.00 0.00 0.00 182.00
1910 0.00 0.00 0.00 7.00 2.50 55.00 138.47 a 46.00 1.00 0.00 a 0.00 0.00 249.97
1911 0.00 0.00 0.00 0.00 0.00 15.50 76.50 18.08 a 3.50 0.00 0.00 0.00 113.58
1912 0.00 0.00 0.00 0.00 0.00 43.50 40.50 32.50 0.00 a 0.00 0.00 0.00 116.50
1913 0.00 0.00 0.00 0.00 6.50 16.61 b 60.50 83.70 a 11.50 j 0.00 b 0.00 0.00 167.31
1914 0.00 0.00 a 0.00 a 0.00 4.65 a 49.29 b 225.86 c 90.93 a 7.20 e 0.00 a 0.00 0.00 a 377.93
1915 0.00 f 0.00 a 0.00 b 0.00 0.00 d 6.00 25.00 j 103.00 0.50 0.00 z 0.00 f 0.00 d 109.50
1916 0.00 e 0.00 c 0.00 m 0.00 0.00 a 17.50 66.28 b 51.87 e 8.28 a 0.00 d 0.00 a 0.00 b 143.92
1917 0.00 d 0.00 c 0.00 b 0.00 0.00 154.14 a 139.00 20.50 0.00 0.00 z 0.00 e 0.00 n 313.64
1918 0.00 0.00 0.00 b 0.00 l 0.00 f 99.50 g 50.50 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1919 0.00 z 0.00 z 0.00 z 0.00 33.00 69.00 177.00 70.00 0.00 z 0.00 z 0.00 z 0.00 o 349.00
1920 0.00 0.00 0.00 a 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 a 0.00
1921 0.00 0.00 a 0.00 c 0.00 a 0.00 35.69 a 159.00 97.00 3.50 0.00 0.00 0.00 295.19
1922 0.00 0.00 z 0.00 z 0.00 2.50 79.66 a 107.00 104.88 a 0.00 z 0.00 z 0.00 z 0.00 z 294.04
1923 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 b 0.00 c 0.00 a 0.00
1924 0.00 0.00 a 0.00 0.00 z 11.88 a 104.00 603.50 478.50 175.71 b 0.00 z 0.00 z 0.00 z 1373.60
1925 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 z 0.00 z 0.00 z 0.00
1926 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 z 0.00 z 0.00 z 0.00
1927 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 z 0.00 z 0.00 z 0.00
1928 0.00 k 0.00 0.00 a 0.00 19.63 a 10.80 e 146.14 c 78.03 b 6.00 0.00 d 0.00 b 0.00 260.61
1929 0.00 e 0.00 a 0.00 a 0.00 3.50 17.31 d 123.48 a 187.00 12.50 0.00 0.00 0.00 343.79
1930 0.00 0.00 0.00 b 0.00 a 0.00 b 34.50 153.97 a 134.00 11.38 a 0.00 b 0.00 0.00 333.85
1931 0.00 a 0.00 a 0.00 a 0.00 14.98 a 55.71 b 170.50 145.00 40.50 0.00 b 0.00 c 0.00 426.70
1932 0.00 0.00 b 0.00 0.00 2.50 70.50 127.50 89.00 10.50 0.00 0.00 d 0.00 300.00
1933 0.00 0.00 0.00 a 0.00 0.00 53.79 a 140.50 113.48 c 3.00 0.00 0.00 0.00 c 310.78
1934 0.00 b 0.00 0.00 a 0.00 23.77 a 17.00 115.50 93.52 a 10.00 0.00 0.00 0.00 259.78
1935 0.00 0.00 0.00 b 0.00 0.00 17.59 a 140.00 117.50 24.31 a 0.00 0.00 0.00 299.40
1936 0.00 0.00 a 0.00 3.62 a 64.50 68.04 b 205.00 118.00 14.46 b 0.00 0.00 a 0.00 473.62
1937 0.00 0.00 a 0.00 0.00 a 3.50 29.00 134.00 g 94.00 23.50 0.00 0.00 0.00 150.00
1938 0.00 0.00 0.00 0.00 1.00 17.14 b 124.50 82.67 a 36.50 0.00 a 0.00 0.00 261.81
1939 0.00 0.00 0.00 1.03 a 12.00 16.55 a 174.00 131.50 6.50 0.00 a 0.00 0.00 341.59
1940 0.00 a 0.00 0.00 0.00 9.00 94.00 116.00 108.00 15.52 a 0.00 0.00 b 0.00 342.52
1941 0.00 0.00 0.00 a 0.00 6.00 35.50 152.00 94.50 0.00 0.00 a 0.00 0.00 288.00
1942 0.00 0.00 0.00 0.00 3.50 2.50 131.00 124.50 5.00 0.00 0.00 0.00 266.50
1943 0.00 a 0.00 0.00 0.00 0.00 5.00 115.50 63.50 3.00 0.00 0.00 0.00 187.00
1944 0.00 0.00 0.00 0.00 3.00 17.50 103.50 38.50 27.00 0.00 0.00 0.00 189.50
1945 0.00 0.00 0.00 0.00 0.00 28.50 162.50 127.50 18.00 0.00 0.00 0.00 a 336.50
1946 0.00 0.00 0.00 0.00 0.00 7.00 125.00 68.00 5.00 0.00 0.00 0.00 205.00
1947 0.00 0.00 0.00 0.00 4.00 2.00 138.00 65.50 11.50 0.00 0.00 0.00 221.00
1948 0.00 0.00 0.00 0.00 1.00 34.00 36.00 43.00 17.00 0.00 0.00 0.00 131.00
1949 0.00 0.00 0.00 0.00 8.00 33.00 96.50 123.00 8.50 0.00 0.00 0.00 269.00
1950 0.00 0.00 0.00 0.00 0.00 13.00 86.50 54.00 27.32 b 0.00 0.00 0.00 a 180.82
1951 0.00 0.00 0.00 0.00 0.50 4.00 135.50 71.50 3.50 0.00 0.00 0.00 215.00
1952 0.00 0.00 0.00 0.00 1.00 13.50 105.50 107.00 16.50 0.00 0.00 0.00 243.50
1953 0.00 0.00 0.00 0.00 0.00 3.50 150.50 87.00 15.00 0.00 0.00 0.00 256.00
1954 0.00 0.00 0.00 0.00 9.00 13.50 127.50 33.50 0.00 0.00 0.00 0.00 183.50
1955 0.00 0.00 0.00 0.00 0.00 24.00 105.00 73.50 24.50 0.00 0.00 0.00 227.00
1956 0.00 0.00 0.00 0.00 6.50 17.00 121.50 40.00 6.50 0.00 0.00 0.00 191.50
1957 0.00 0.00 0.00 0.00 1.50 31.50 107.50 59.50 14.50 0.00 0.00 a 0.00 214.50
1958 0.00 0.00 0.00 0.00 31.50 25.00 77.00 141.50 13.00 0.00 0.00 0.00 288.00
1959 0.00 0.00 0.00 0.00 0.00 52.00 127.62 a 39.00 6.00 0.00 0.00 0.00 224.62
1960 0.00 0.00 0.00 0.00 1.50 20.00 229.00 62.50 12.00 0.00 0.00 0.00 325.00
1961 0.00 0.00 0.00 0.00 0.00 84.50 142.00 148.50 2.50 0.00 0.00 0.00 377.50
1962 0.00 0.00 0.00 0.00 0.00 22.50 57.50 51.00 1.50 0.00 0.00 0.00 132.50
1963 0.00 0.00 0.00 0.00 0.00 23.50 59.00 80.00 11.50 3.50 0.00 0.00 177.50
1964 0.00 0.00 0.00 0.00 1.00 17.00 83.00 29.50 0.00 0.00 0.00 0.00 130.50
1965 0.00 0.00 0.00 0.00 0.00 8.50 58.50 58.00 0.00 0.00 0.00 0.00 125.00
1966 0.00 0.00 0.00 0.00 8.50 19.00 109.00 64.00 3.50 0.00 0.00 0.00 204.00
1967 0.00 0.00 0.00 0.00 2.00 15.50 157.50 165.50 59.00 0.00 0.00 0.00 399.50
1968 0.00 0.00 0.00 0.00 0.00 23.00 114.50 39.00 3.00 0.00 0.00 0.00 179.50
1969 0.00 0.00 0.00 0.00 0.00 36.00 93.00 133.50 19.00 0.00 0.00 0.00 281.50
1970 0.00 0.00 0.00 0.00 1.00 87.50 139.50 74.50 1.50 0.00 0.00 0.00 304.00
1971 0.00 0.00 0.00 0.00 0.00 11.50 77.50 166.50 0.00 0.00 0.00 0.00 255.50
1972 0.00 0.00 0.00 0.00 9.50 29.50 79.50 102.50 2.00 0.00 0.00 0.00 223.00
1973 0.00 0.00 0.00 0.00 0.50 34.50 101.00 108.50 13.00 0.00 0.00 0.00 257.50
1974 0.00 0.00 0.00 0.00 0.00 92.00 84.00 32.00 0.00 0.00 0.00 0.00 208.00
1975 0.00 0.00 0.00 0.00 0.50 0.00 168.00 26.50 0.50 0.00 0.00 0.00 195.50
1976 0.00 0.00 0.00 0.00 0.50 11.00 74.50 30.00 16.00 0.00 a 0.00 0.00 132.00
1977 0.00 0.00 0.00 3.00 0.00 40.00 58.00 93.50 8.00 0.00 0.00 0.00 202.50
1978 0.00 0.00 0.00 0.00 0.00 11.00 64.00 58.50 26.00 0.00 0.00 0.00 159.50
1979 0.00 0.00 0.00 0.00 2.58 a 32.50 108.50 37.00 4.00 0.00 0.00 0.00 184.58
1980 0.00 0.00 0.00 0.00 9.00 1.50 59.00 13.50 0.00 0.00 0.00 0.00 83.00
1981 0.00 0.00 0.00 0.00 0.00 7.00 55.00 140.50 21.00 0.00 0.00 0.00 223.50
1982 0.00 a 0.00 0.00 0.00 0.00 11.00 68.00 78.50 4.00 0.00 0.00 0.00 161.50
1983 0.00 0.00 0.00 0.00 11.00 7.50 44.00 122.50 4.50 0.00 0.00 0.00 189.50
1984 0.00 0.00 0.00 0.00 7.50 36.00 110.50 96.50 4.00 0.00 0.00 0.00 254.50
1985 0.00 0.00 0.00 0.00 6.50 42.50 220.00 32.03 a 0.00 0.00 0.00 a 0.00 301.03
1986 0.00 0.00 0.00 0.00 49.50 94.14 a 36.50 82.50 0.00 0.00 0.00 0.00 262.64
1987 0.00 0.00 0.00 3.50 10.00 62.00 80.00 42.50 11.50 0.00 0.00 0.00 209.50
1988 0.00 0.00 0.00 0.00 3.00 72.50 93.00 48.00 13.00 0.00 0.00 0.00 229.50
1989 0.00 0.00 0.00 0.00 1.00 26.00 161.50 47.00 5.00 0.00 0.00 0.00 240.50
1990 0.00 0.00 0.00 0.00 0.00 65.00 140.50 102.00 28.00 0.00 0.00 0.00 335.50
1991 0.00 0.00 0.00 0.00 0.00 2.00 138.50 150.50 5.50 2.00 0.00 0.00 298.50
1992 0.00 0.00 0.00 0.00 4.50 85.50 46.00 107.00 1.50 0.00 0.00 0.00 244.50
1993 0.00 0.00 0.00 0.00 14.50 11.50 11.00 24.50 9.00 0.00 0.00 0.00 70.50
1994 0.00 0.00 0.00 0.50 2.00 37.00 162.00 132.00 0.00 0.00 0.00 0.00 333.50
1995 0.00 0.00 0.00 0.00 1.50 6.50 74.50 65.50 20.00 0.00 0.00 0.00 168.00
1996 0.00 0.00 0.00 0.00 0.00 25.50 169.00 87.00 5.50 0.00 0.00 0.00 287.00
1997 0.00 0.00 0.00 0.00 5.00 9.50 75.00 101.00 6.50 0.00 0.00 0.00 197.00
1998 0.00 0.00 0.00 0.00 0.00 2.00 200.50 175.50 93.50 0.00 0.00 0.00 471.50
1999 0.00 0.00 0.00 0.00 7.00 15.00 111.00 150.35 a 0.00 0.00 0.00 0.00 283.35
2000 0.00 0.00 0.00 0.00 2.50 29.50 192.50 113.50 14.50 0.00 0.00 0.00 352.50
2001 0.00 0.00 0.00 0.00 24.50 39.00 125.50 180.50 23.00 0.00 0.00 0.00 392.50
2002 0.00 0.00 0.00 0.00 4.50 45.50 203.00 29.00 19.00 0.00 0.00 0.00 301.00
2003 0.00 0.00 0.00 0.00 21.00 58.00 252.00 144.50 21.00 0.50 0.00 0.00 497.00
2004 0.00 0.00 0.00 a 0.00 0.00 30.00 149.50 89.00 6.00 0.00 g 0.00 z 0.00 z 274.50
Period of Record Statistics
MEAN 0.00 0.00 0.00 0.19 5.32 31.48 121.22 91.61 17.48 3.71 0.00 0.00 249.96
S.D. 0.00 0.00 0.00 0.91 10.03 28.41 71.38 62.78 45.43 35.39 0.00 0.00 89.12
SKEW 0.00 0.00 0.00 5.62 3.51 1.51 3.32 2.93 6.87 9.59 0.00 0.00 0.50
MAX 0.00 0.00 0.00 7.00 64.50 154.14 603.50 478.50 399.50 345.00 0.00 0.00 497.00
MIN 0.00 0.00 0.00 0.00 0.00 0.00 11.00 13.50 0.00 0.00 0.00 0.00 70.50
NO YRS 98 99 98 99 100 99 97 98 95 95 96 95 82