HAMILTON, MONTANA

Monthly Total Growing Degree Days

(243885)

Base Temperature = 40 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 457.50 k 788.50 727.00 164.50 32.00 g 6.00 0.00 z 1686.00
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 291.00 q 349.50 105.50 13.00 468.00
1899 29.00 6.00 7.50 203.50 361.00 555.50 78.50 z 553.50 f 693.00 256.00 203.00 0.00 2314.50
1900 20.00 21.50 129.00 214.50 432.00 728.50 801.19 b 657.00 501.50 269.00 24.83 a 2.50 3801.52
1901 3.50 17.50 21.00 131.50 512.00 532.50 1005.00 1088.00 1137.50 1117.00 0.00 z 0.00 z 5565.50
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 48.50 2.50 51.00
1903 12.50 0.00 62.00 173.00 363.00 672.00 680.00 774.00 424.00 175.50 22.50 1.50 3360.00
1904 10.50 1.50 15.50 274.50 423.50 535.00 783.00 808.50 571.50 273.50 64.50 9.50 3771.00
1905 0.50 53.00 97.00 253.00 441.50 507.50 837.50 798.50 543.50 129.00 17.22 c 0.00 z 3678.22
1906 11.22 b 20.00 82.50 292.50 400.00 507.00 919.00 777.00 535.50 263.50 57.00 f 0.50 u 3808.22
1907 0.00 21.00 42.50 170.50 350.00 469.50 722.50 635.00 145.50 s 294.50 58.50 2.30 d 2766.30
1908 0.00 21.00 81.50 261.50 307.50 434.50 812.50 526.00 i 581.79 b 162.00 99.11 b 4.65 a 2766.04
1909 10.00 15.50 65.00 123.62 a 352.50 622.00 777.00 822.50 425.50 f 242.50 133.50 0.50 3164.62
1910 25.50 2.50 224.50 434.00 511.00 674.00 901.07 a 694.00 407.50 310.52 a 57.00 0.00 4241.58
1911 0.00 0.00 132.50 166.00 343.00 636.00 788.00 662.88 a 382.00 145.00 22.50 1.50 3279.38
1912 13.50 5.50 22.50 196.50 392.00 677.00 713.50 695.00 310.34 a 124.00 60.00 0.50 3210.34
1913 1.00 17.00 22.50 224.50 410.00 641.25 b 752.50 806.52 a 381.50 j 162.48 b 43.50 0.00 3081.25
1914 19.50 6.22 a 101.78 a 270.50 586.93 a 647.68 b 995.88 c 811.17 a 490.80 e 198.92 a 71.50 0.00 a 4200.88
1915 0.00 f 10.37 a 120.26 b 340.00 412.19 d 512.00 461.00 j 876.00 409.00 0.00 z 8.00 f 4.59 d 2684.41
1916 0.00 e 3.90 c 79.50 m 214.50 287.78 a 513.50 801.19 b 755.92 e 490.34 a 121.70 d 25.34 a 0.00 b 3214.19
1917 4.02 d 2.80 c 0.00 b 89.50 401.50 780.52 a 897.50 706.50 433.50 0.00 z 75.60 e 48.00 n 3391.44
1918 19.50 29.00 305.19 b 86.50 l 273.00 f 624.00 g 558.50 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 353.69
1919 0.00 z 0.00 z 0.00 z 274.50 473.00 688.00 940.00 805.00 0.00 z 0.00 z 0.00 z 12.00 o 3180.50
1920 49.50 9.00 29.97 a 105.00 346.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5.68 a 545.15
1921 1.00 62.74 a 108.50 c 166.03 a 492.50 708.10 a 904.50 843.00 376.50 413.50 64.00 24.00 4164.38
1922 0.00 0.00 z 0.00 z 132.50 379.00 788.79 a 854.50 842.68 a 0.00 z 0.00 z 0.00 z 0.00 z 2997.48
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 227.69 b 18.89 c 0.00 a 246.58
1924 0.00 13.98 a 72.50 0.00 z 707.83 a 778.50 1378.50 1253.50 889.29 b 0.00 z 0.00 z 0.00 z 5094.10
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 5.00 k 0.00 84.22 a 145.00 576.60 a 533.40 e 880.73 c 792.10 b 505.00 279.00 d 20.89 b 4.50 3821.45
1929 0.00 e 0.00 a 54.25 a 126.00 389.00 575.19 d 882.98 a 961.00 389.00 227.00 38.50 40.00 3682.93
1930 2.00 58.50 43.83 b 373.97 a 431.33 b 618.00 915.02 a 898.50 535.34 a 142.71 b 19.50 0.00 4038.69
1931 21.18 a 8.81 a 90.93 a 203.00 537.33 a 709.29 b 920.00 903.00 521.50 183.33 b 66.67 c 2.50 4167.54
1932 5.00 70.35 b 39.00 182.00 446.00 679.00 878.50 803.00 531.00 214.50 75.58 d 16.50 3940.43
1933 0.00 1.50 19.63 a 174.00 284.00 727.24 a 906.00 843.09 c 474.00 329.50 96.00 44.29 c 3899.25
1934 20.84 b 33.50 160.68 a 373.50 602.43 a 609.50 869.50 850.43 a 469.00 297.00 76.50 0.50 4363.39
1935 18.50 8.50 35.28 b 162.50 375.00 639.31 a 880.00 860.50 628.97 a 292.50 22.00 3.00 3926.05
1936 4.50 8.80 a 64.00 366.21 a 677.00 704.46 b 974.50 859.50 505.71 b 245.00 1.03 a 36.00 4446.72
1937 0.00 0.00 a 16.50 170.17 a 496.50 586.00 725.50 g 806.50 620.00 303.50 46.00 7.00 3052.17
1938 10.00 0.00 41.00 216.50 403.00 660.00 b 871.00 814.27 a 698.00 253.17 a 24.50 30.00 4021.43
1939 19.50 0.00 124.00 319.14 a 557.00 541.03 a 926.50 879.50 576.50 315.68 a 30.00 40.00 4328.86
1940 0.00 a 24.00 66.00 200.50 570.50 744.50 876.50 869.50 595.34 a 302.00 10.71 b 6.50 4266.06
1941 1.50 15.50 142.08 a 224.50 487.50 630.00 920.50 802.00 364.50 150.87 a 39.50 20.00 3798.45
1942 0.00 0.00 29.00 298.00 358.50 505.50 893.00 841.50 552.50 291.00 13.00 17.50 3799.50
1943 4.13 a 3.00 73.50 286.50 304.00 485.00 851.50 779.50 592.00 269.00 11.50 8.00 3667.63
1944 17.00 7.00 32.00 221.00 455.50 568.00 837.50 738.00 567.00 308.00 27.00 15.00 3793.00
1945 18.50 0.00 60.00 138.00 413.50 560.50 923.00 881.50 475.50 333.00 48.00 2.58 a 3854.08
1946 0.00 14.00 119.50 271.00 423.50 589.50 865.50 786.50 481.00 121.00 9.00 13.00 3693.50
1947 11.00 20.00 107.00 223.50 557.50 538.50 903.50 792.50 500.50 329.00 22.50 2.50 4008.00
1948 4.00 16.50 23.50 181.50 426.00 676.50 757.00 771.50 515.00 189.00 7.00 0.00 3567.50
1949 1.00 9.00 8.00 324.00 551.50 650.00 830.50 864.50 568.50 149.50 102.00 11.00 4069.50
1950 1.00 26.50 30.00 147.00 345.00 555.00 817.50 772.50 525.54 b 301.50 44.50 35.13 a 3601.17
1951 8.00 21.00 34.00 233.00 414.00 507.50 859.50 769.00 473.00 180.50 8.50 2.00 3510.00
1952 0.00 9.00 32.00 361.50 478.50 619.50 839.50 845.50 608.50 306.50 13.50 0.00 4114.00
1953 69.00 22.50 91.00 184.50 319.00 531.50 909.00 797.50 614.00 282.00 81.50 4.50 3906.00
1954 12.50 34.50 34.00 219.50 471.00 503.00 877.00 686.50 484.00 147.50 90.00 3.00 3562.50
1955 0.00 0.00 14.00 109.50 325.50 570.00 760.00 831.00 461.50 278.50 32.50 3.50 3386.00
1956 5.00 5.50 51.00 206.00 485.50 601.00 842.00 729.50 542.00 212.50 41.50 22.00 3743.50
1957 0.00 11.50 33.50 148.00 544.50 637.00 856.50 771.50 571.00 145.00 20.69 a 24.00 3763.19
1958 7.50 35.50 44.00 123.00 625.50 646.00 792.00 892.50 503.50 253.50 59.50 27.00 4009.50
1959 23.50 4.50 49.00 194.50 286.00 664.50 855.60 a 742.50 433.00 199.50 37.00 13.50 3503.10
1960 9.00 5.50 106.50 169.50 355.50 662.50 996.50 708.00 555.00 243.00 30.00 0.00 3841.00
1961 23.50 29.50 67.50 129.00 377.00 775.50 912.50 913.00 337.50 192.00 1.50 7.00 3765.50
1962 20.00 27.50 34.50 224.50 350.50 604.00 769.00 742.00 487.50 170.00 21.50 30.50 3481.50
1963 11.50 45.50 76.00 151.00 434.00 553.50 773.50 789.00 583.00 309.50 37.00 0.00 3763.50
1964 5.50 3.00 34.50 101.50 347.00 540.50 833.50 670.00 399.50 180.00 27.00 3.50 3145.50
1965 0.50 47.00 9.50 189.50 342.50 571.50 790.50 728.00 253.50 263.00 31.00 28.50 3255.00
1966 11.00 1.50 85.00 171.50 501.00 534.50 858.50 763.50 597.00 218.00 43.50 22.50 3807.50
1967 4.50 29.00 32.00 63.00 388.50 612.00 927.00 933.50 693.50 232.00 33.00 6.00 3954.00
1968 4.00 28.50 106.00 127.00 317.50 571.00 836.00 666.50 437.00 150.50 35.00 3.00 3282.00
1969 2.00 0.00 63.50 276.50 502.50 616.00 818.00 863.50 542.50 126.00 44.50 0.50 3855.50
1970 4.50 15.50 16.50 55.50 426.50 700.00 883.00 824.50 350.50 141.00 14.00 9.50 3441.00
1971 50.50 42.50 28.00 136.00 415.50 541.00 775.00 926.50 334.00 176.50 45.00 6.50 3477.00
1972 5.00 31.00 158.50 117.00 432.00 675.00 790.00 838.50 384.00 139.50 12.00 29.00 3611.50
1973 21.50 13.50 37.50 116.00 414.50 606.00 832.00 844.50 484.00 224.00 16.00 10.50 3620.00
1974 25.50 11.00 56.00 192.00 287.50 727.50 808.00 708.50 462.00 191.00 49.50 1.50 3520.00
1975 7.50 3.50 10.50 58.50 314.00 519.00 925.50 700.50 482.50 243.00 70.50 48.50 3383.50
1976 11.50 13.00 47.50 169.00 492.00 498.50 832.00 728.00 566.50 212.35 a 58.00 26.50 3654.85
1977 3.00 31.00 33.50 291.50 319.50 706.00 767.00 792.00 444.50 141.50 10.00 6.50 3546.00
1978 0.00 6.50 189.00 171.00 310.00 620.50 778.00 738.50 516.00 254.50 36.00 0.00 3620.00
1979 0.00 18.00 71.00 170.00 446.40 a 652.00 829.50 766.50 555.00 225.00 0.00 21.00 3754.40
1980 0.00 9.50 10.00 305.00 441.50 531.00 772.50 651.00 512.00 201.00 52.00 66.50 3552.00
1981 0.00 27.00 39.00 214.00 322.00 470.50 769.50 903.50 537.50 197.50 39.00 3.00 3522.50
1982 0.00 a 41.00 31.50 129.00 358.50 603.00 763.50 814.50 427.00 137.50 6.00 4.00 3315.50
1983 16.00 22.00 59.50 166.00 411.50 607.50 715.00 885.00 384.00 198.00 64.00 0.00 3528.50
1984 37.50 6.00 61.00 174.00 363.00 557.00 857.00 845.00 391.00 162.00 28.00 1.50 3483.00
1985 3.50 3.00 35.50 303.00 503.50 676.50 995.00 696.98 a 332.00 164.50 31.55 a 0.50 3745.54
1986 23.00 36.00 137.50 177.50 484.00 791.38 a 721.00 839.00 336.50 204.00 30.50 0.00 3780.38
1987 0.00 0.00 78.50 353.00 531.00 692.00 766.50 693.50 582.00 244.00 44.00 22.50 4007.00
1988 3.50 18.50 80.00 299.00 443.50 706.00 823.00 766.50 487.50 412.50 61.50 15.00 4116.50
1989 21.50 2.50 35.50 271.00 416.00 669.00 924.50 709.50 524.00 189.50 87.00 4.00 3854.00
1990 12.00 24.00 63.50 273.00 352.00 612.50 893.00 801.00 677.00 168.00 98.00 3.00 3977.00
1991 10.00 35.50 24.50 146.00 342.00 514.00 900.50 920.50 560.00 264.00 26.00 8.50 3751.50
1992 14.50 27.00 125.00 259.00 549.00 725.50 729.50 776.00 471.50 244.00 8.00 0.00 3929.00
1993 3.00 0.00 93.50 135.50 559.50 524.00 582.00 676.50 467.50 248.50 12.00 17.50 3319.50
1994 37.00 5.50 108.50 265.50 498.00 600.00 904.00 881.00 566.50 165.50 6.50 10.50 4048.50
1995 8.00 71.00 56.00 128.00 382.00 535.50 797.50 743.00 501.50 152.50 76.00 9.00 3460.00
1996 9.50 14.00 25.00 196.00 296.00 627.00 927.00 797.50 453.00 216.50 12.00 4.50 3578.00
1997 8.50 8.00 89.50 131.00 515.50 610.50 793.00 852.00 564.50 189.00 16.00 4.50 3782.00
1998 7.50 3.00 82.00 222.50 478.00 515.00 973.50 935.50 718.00 158.50 35.50 16.50 4145.50
1999 18.50 9.00 93.50 167.00 373.50 580.00 819.50 895.38 a 498.00 231.50 85.00 4.50 3775.38
2000 0.00 6.00 65.50 282.50 443.50 675.50 938.00 850.00 481.00 183.50 4.50 0.00 3930.00
2001 5.50 0.00 59.50 157.00 515.50 582.50 861.50 954.00 665.50 213.50 63.50 0.00 4078.00
2002 8.00 12.00 34.00 159.50 367.00 632.50 962.00 728.50 549.50 161.50 43.50 4.50 3662.50
2003 18.50 2.00 101.50 193.50 422.00 696.00 1026.50 907.00 560.00 303.50 13.50 0.00 4244.00
2004 0.50 0.50 164.82 a 237.50 382.50 598.00 900.00 788.50 432.50 176.50 g 0.00 z 0.00 z 3504.82
Period of Record Statistics
MEAN 10.23 16.11 67.42 204.48 428.28 612.06 854.38 806.45 509.14 232.75 41.84 10.41 3766.17
S.D. 12.25 16.34 50.11 76.96 90.55 81.15 94.96 93.49 124.30 112.92 32.82 13.07 293.44
SKEW 2.07 1.38 1.70 0.58 0.61 0.20 1.50 1.22 1.33 5.15 1.68 1.76 0.10
MAX 69.00 71.00 305.19 434.00 707.83 791.38 1378.50 1253.50 1137.50 1117.00 203.00 66.50 4446.72
MIN 0.00 0.00 0.00 55.50 284.00 434.50 582.00 635.00 164.50 121.00 0.00 0.00 3145.50
NO YRS 98 99 98 99 100 99 97 98 95 95 96 95 82