HAMILTON, MONTANA

Monthly Total Growing Degree Days

(243885)

Base Temperature = 50 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 267.50 k 478.50 444.00 20.00 1.50 g 0.00 0.00 z 942.50
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 171.00 q 94.50 4.00 2.00 100.50
1899 0.00 0.00 0.00 68.00 117.00 256.00 48.50 z 303.50 f 393.00 70.50 24.00 0.00 928.50
1900 0.00 0.00 18.00 23.50 142.00 428.50 496.53 b 355.00 204.50 47.00 0.00 a 0.00 1715.03
1901 0.00 2.50 0.00 5.50 252.00 247.00 695.00 778.00 837.50 807.00 0.00 z 0.00 z 3624.50
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 3.00 20.50 108.00 372.00 370.00 464.00 152.50 7.50 0.50 0.00 1498.00
1904 0.00 0.00 0.00 64.50 149.00 242.50 473.00 498.50 273.50 70.00 1.50 0.00 1772.50
1905 0.00 0.00 2.50 38.00 170.00 214.50 527.50 488.50 263.00 36.00 0.00 c 0.00 z 1740.00
1906 0.00 b 0.00 7.00 69.00 125.50 211.00 609.00 467.00 244.50 81.50 0.00 f 0.00 u 1814.50
1907 0.00 0.00 4.00 18.50 100.00 189.50 412.50 325.50 41.00 s 33.00 0.00 0.00 d 1083.00
1908 0.00 0.00 8.00 56.00 60.00 152.50 502.50 308.50 i 306.96 b 14.00 9.64 b 0.00 a 1109.61
1909 0.00 0.00 0.00 10.86 a 90.00 327.00 467.00 512.50 194.50 f 48.00 18.50 0.00 1473.86
1910 0.00 0.00 35.50 169.00 216.00 377.00 591.07 a 388.00 137.50 88.35 a 0.00 0.00 2002.42
1911 0.00 0.00 11.50 21.50 70.50 336.00 478.00 352.88 a 125.00 17.50 0.00 0.00 1412.88
1912 0.00 0.00 0.00 23.50 118.00 379.00 403.50 385.00 62.59 a 8.50 1.00 0.00 1381.09
1913 0.00 0.00 0.00 58.00 165.00 341.25 b 442.50 496.52 a 181.50 j 35.28 b 0.00 0.00 1538.54
1914 0.00 0.00 a 10.33 a 34.50 283.65 a 354.11 b 685.88 c 501.17 a 209.40 e 36.68 a 0.50 0.00 a 2116.22
1915 0.00 f 0.00 a 7.48 b 89.50 140.07 d 216.00 251.00 j 566.00 145.00 0.00 z 0.00 f 0.00 d 1164.06
1916 0.00 e 0.00 c 9.50 m 40.50 66.13 a 231.50 491.19 b 447.71 e 204.83 a 16.07 d 0.00 a 0.00 b 1497.94
1917 0.00 d 0.00 c 0.00 b 0.00 138.50 487.76 a 587.50 396.50 166.50 0.00 z 4.20 e 3.00 n 1780.96
1918 4.00 0.00 85.52 b 11.00 l 72.50 f 394.00 g 348.50 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 89.52
1919 0.00 z 0.00 z 0.00 z 63.50 235.50 388.00 630.00 495.00 0.00 z 0.00 z 0.00 z 0.00 o 1812.00
1920 0.00 0.00 0.00 a 0.50 77.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 a 77.50
1921 0.00 1.56 a 14.39 c 18.62 a 189.00 408.10 a 594.50 533.00 122.50 123.50 3.50 4.00 2012.67
1922 0.00 0.00 z 0.00 z 8.50 123.50 488.79 a 544.50 532.68 a 0.00 z 0.00 z 0.00 z 0.00 z 1697.98
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 41.69 b 0.00 c 0.00 a 41.69
1924 0.00 0.00 a 0.00 0.00 z 400.93 a 488.50 1068.50 943.50 589.29 b 0.00 z 0.00 z 0.00 z 3490.72
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 0.52 a 37.50 286.23 a 234.00 e 570.73 c 482.10 b 206.00 70.61 d 0.00 b 0.00 1887.70
1929 0.00 e 0.00 a 2.07 a 6.50 145.00 280.38 d 572.98 a 651.00 156.00 42.50 0.00 0.00 1856.43
1930 0.00 5.00 0.00 b 96.21 a 150.19 b 322.50 605.02 a 588.50 242.07 a 24.59 b 0.50 0.00 2034.57
1931 0.52 a 0.00 a 1.55 a 36.00 266.60 a 409.29 b 610.00 593.00 237.00 27.26 b 13.89 c 0.00 2195.10
1932 0.00 8.59 b 4.50 25.00 163.50 382.00 568.50 495.50 239.00 50.00 2.88 d 0.00 1939.48
1933 0.00 0.00 0.00 a 31.50 77.00 427.24 a 596.00 533.09 c 207.00 87.50 3.00 0.00 c 1962.33
1934 0.00 b 5.50 9.82 a 122.50 301.73 a 310.50 559.50 540.43 a 217.50 88.00 16.50 0.00 2171.98
1935 0.00 0.00 4.81 b 17.50 108.50 339.31 a 570.00 550.50 331.55 a 102.00 0.00 0.00 2024.17
1936 0.00 0.00 a 1.50 147.41 a 377.00 406.61 b 664.50 549.50 243.21 b 44.00 0.00 a 0.00 2433.74
1937 0.00 0.00 a 0.00 29.48 a 190.00 290.00 485.50 g 496.50 335.50 51.00 2.00 0.00 1394.48
1938 0.00 0.00 0.00 33.50 156.00 363.75 b 561.00 504.27 a 398.00 57.35 a 0.00 0.00 2073.87
1939 0.00 0.00 15.00 103.45 a 251.50 246.21 a 616.50 569.50 276.50 71.30 a 2.00 1.00 2152.96
1940 0.00 a 1.50 0.00 44.50 269.00 446.50 566.50 559.50 298.97 a 57.00 0.00 b 0.00 2243.47
1941 0.00 0.00 14.47 a 35.50 196.50 330.00 610.50 492.00 88.00 10.33 a 0.50 0.00 1777.80
1942 0.00 0.00 0.00 67.50 117.50 211.50 583.00 531.50 254.50 94.00 0.00 1.50 1861.00
1943 0.00 a 0.00 8.50 75.00 93.50 201.50 541.50 469.50 292.00 87.50 0.00 0.00 1769.00
1944 0.00 0.00 0.00 31.50 182.00 268.00 527.50 428.00 282.00 60.50 0.00 0.00 1779.50
1945 0.00 0.00 0.00 20.00 124.00 263.50 613.00 571.50 203.50 93.50 6.00 0.00 a 1895.00
1946 0.00 0.00 17.50 83.50 144.00 289.50 555.50 476.50 202.00 13.50 0.00 0.00 1782.00
1947 0.00 0.00 2.50 53.50 251.00 238.50 593.50 482.50 229.00 95.50 4.00 0.00 1950.00
1948 0.00 0.00 0.00 46.50 167.00 376.50 447.50 461.50 236.00 22.50 0.00 0.00 1757.50
1949 0.00 0.00 0.00 83.50 260.00 351.00 520.50 554.50 271.50 17.50 6.00 0.00 2064.50
1950 0.00 1.00 0.00 22.00 116.50 263.50 507.50 462.50 273.21 b 78.50 11.00 0.00 a 1735.71
1951 0.00 1.00 0.50 35.00 146.00 224.50 549.50 459.00 188.00 32.00 0.00 0.00 1635.50
1952 0.00 0.00 0.00 128.00 183.50 319.50 529.50 535.50 310.50 73.00 0.00 0.00 2079.50
1953 0.00 0.00 5.00 53.50 97.00 231.50 599.00 487.50 316.50 56.50 8.50 0.00 1855.00
1954 0.00 0.00 0.00 40.00 197.00 210.50 567.00 376.50 202.50 19.50 0.00 0.00 1613.00
1955 0.00 0.00 0.00 13.00 69.50 278.50 452.50 521.00 211.50 57.00 0.50 0.00 1603.50
1956 0.00 0.00 0.50 29.00 220.00 303.00 532.00 419.50 245.50 32.50 3.00 4.00 1789.00
1957 0.00 0.00 0.00 26.00 240.50 337.00 546.50 461.50 288.00 24.00 0.00 a 1.50 1925.00
1958 0.00 0.00 0.50 1.50 324.00 346.00 482.00 582.50 219.50 73.00 0.00 0.00 2029.00
1959 0.00 0.00 3.50 28.50 56.50 364.50 545.60 a 432.50 166.00 31.50 3.00 0.00 1631.60
1960 0.00 0.00 12.50 39.00 109.50 362.50 686.50 403.00 260.00 70.50 0.00 0.00 1943.50
1961 0.00 0.00 0.50 13.00 119.50 475.50 602.50 603.00 107.50 51.00 0.00 0.00 1972.50
1962 0.00 4.00 2.00 47.00 62.50 315.00 459.00 432.00 200.00 17.00 0.00 0.00 1538.50
1963 0.00 0.50 4.50 23.00 165.00 259.00 463.50 479.00 291.00 74.00 1.00 0.00 1760.50
1964 0.00 0.00 1.00 2.50 98.00 241.00 523.50 361.00 113.00 13.50 3.00 0.00 1356.50
1965 0.00 0.00 0.00 27.00 106.00 272.50 480.50 421.00 55.00 57.50 0.00 2.00 1421.50
1966 0.00 0.00 14.50 18.50 224.50 245.50 548.50 453.50 297.50 38.00 5.50 0.00 1846.00
1967 0.00 0.00 0.00 0.00 155.50 312.00 617.00 623.50 393.50 29.50 0.50 0.00 2131.50
1968 0.00 0.00 5.00 35.00 48.50 278.00 526.00 357.50 169.50 22.50 0.00 0.00 1442.00
1969 0.00 0.00 0.00 51.00 217.50 317.50 508.00 553.50 247.00 22.00 1.50 0.00 1918.00
1970 0.00 0.00 0.00 2.00 155.50 400.00 573.00 514.50 117.50 41.00 0.00 0.00 1803.50
1971 3.00 0.00 0.00 11.00 148.50 241.50 465.00 616.50 104.00 49.50 4.00 0.00 1643.00
1972 0.00 0.00 16.00 9.00 163.50 375.00 480.00 528.50 144.50 17.00 0.00 0.00 1733.50
1973 0.00 0.00 0.00 5.50 152.00 315.00 522.00 534.50 200.00 39.00 0.00 0.00 1768.00
1974 0.00 0.00 0.00 27.00 74.00 431.00 498.00 398.50 175.50 21.00 0.50 0.00 1625.50
1975 0.00 0.00 0.00 0.00 84.50 222.00 615.50 390.50 189.00 65.00 10.00 6.50 1583.00
1976 0.00 0.00 0.00 15.00 187.00 202.50 522.00 418.00 269.00 60.97 a 5.00 0.00 1679.47
1977 0.00 0.00 0.00 102.00 75.50 406.00 457.00 482.00 174.00 12.50 0.00 0.00 1709.00
1978 0.00 0.00 43.00 6.00 76.50 320.50 468.00 428.50 246.00 42.50 2.50 0.00 1633.50
1979 0.00 0.00 1.00 22.00 169.98 a 354.50 519.50 456.50 255.00 45.50 0.00 0.00 1823.98
1980 0.00 0.00 0.00 112.50 156.50 239.50 462.50 342.50 220.00 43.50 5.50 3.00 1585.50
1981 0.00 0.00 0.00 58.50 91.50 174.00 459.50 593.50 271.50 36.50 2.50 0.00 1687.50
1982 0.00 a 0.00 0.00 13.50 119.50 308.00 453.50 504.50 181.00 15.50 0.00 0.00 1595.50
1983 0.00 0.00 2.50 36.00 162.00 307.50 405.00 575.00 141.50 14.00 6.50 0.00 1650.00
1984 0.00 0.00 0.00 40.50 125.00 258.50 547.00 535.00 163.00 38.50 2.50 0.00 1710.00
1985 0.00 0.00 0.00 100.50 216.50 376.50 685.00 387.50 a 95.50 21.00 1.03 a 0.00 1883.53
1986 0.00 5.50 20.00 33.50 241.50 491.38 a 411.00 529.00 90.00 32.00 0.00 0.00 1853.88
1987 0.00 0.00 9.00 126.00 242.50 397.50 456.50 383.50 283.00 68.50 0.00 0.00 1966.50
1988 0.00 0.00 7.00 85.00 193.50 409.50 513.00 456.50 212.50 146.50 7.00 1.50 2032.00
1989 0.00 0.00 0.00 78.50 139.00 369.50 614.50 399.50 232.00 28.50 14.00 0.00 1875.50
1990 0.00 0.00 1.50 58.50 89.50 321.50 583.00 491.00 377.00 30.50 20.00 0.00 1972.50
1991 0.00 0.00 0.00 13.50 81.00 214.50 590.50 610.50 264.00 95.00 0.00 0.00 1869.00
1992 0.00 0.00 0.00 74.00 249.00 428.50 419.50 477.50 184.50 53.50 0.00 0.00 1886.50
1993 0.00 0.00 10.50 2.00 270.50 229.50 272.00 367.00 201.50 67.50 0.00 0.00 1420.50
1994 0.00 0.00 7.50 76.50 193.00 304.00 594.00 571.00 268.00 21.00 0.00 0.00 2035.00
1995 0.00 7.50 3.50 7.50 110.00 254.50 487.50 433.00 228.50 24.50 5.00 0.00 1561.50
1996 0.00 0.00 0.00 43.50 59.00 328.50 617.00 487.50 193.00 63.00 0.00 0.00 1791.50
1997 0.00 0.00 10.50 9.50 226.00 310.50 483.00 542.00 266.00 26.50 0.00 0.00 1874.00
1998 0.00 0.00 6.00 59.50 178.00 217.00 663.50 625.50 418.00 16.50 0.00 0.00 2184.00
1999 0.00 0.00 1.50 34.00 139.50 287.00 509.50 585.38 a 222.00 33.50 27.50 0.00 1839.88
2000 0.00 0.00 2.00 57.50 169.00 376.50 628.00 540.00 216.50 24.00 0.00 0.00 2013.50
2001 0.00 0.00 0.00 47.00 238.00 305.50 551.50 644.00 365.50 29.00 2.00 0.00 2182.50
2002 0.00 0.00 0.00 14.00 134.00 352.00 652.00 418.50 263.00 30.50 0.00 0.00 1864.00
2003 0.00 0.00 16.50 29.50 186.00 396.00 716.50 597.00 270.00 107.00 0.00 0.00 2318.50
2004 0.00 0.00 27.90 a 42.00 118.00 299.50 590.00 478.50 152.00 26.50 g 0.00 z 0.00 z 1707.90
Period of Record Statistics
MEAN 0.08 0.45 5.37 42.57 161.87 316.23 544.47 497.14 232.78 55.56 2.89 0.28 1835.58
S.D. 0.50 1.52 11.20 35.25 72.12 78.96 94.90 92.91 106.84 83.03 5.39 0.99 226.73
SKEW 6.89 3.81 4.52 1.24 0.80 0.26 1.50 1.24 2.20 7.93 2.62 4.21 0.05
MAX 4.00 8.59 85.52 169.00 400.93 491.38 1068.50 943.50 837.50 807.00 27.50 6.50 2433.74
MIN 0.00 0.00 0.00 0.00 48.50 152.50 272.00 325.50 20.00 7.50 0.00 0.00 1356.50
NO YRS 98 99 98 99 100 99 97 98 95 95 96 95 82