ST IGNATIUS, MONTANA

Monthly Total Growing Degree Days

(247286)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201012
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
1896 0.00 z 37.46 e 52.50 171.00 273.00 648.00 577.50 n 273.50 t 388.50 178.25 a 49.14 a 48.16 c 1846.01
1897 2.00 0.00 a 21.50 250.50 640.50 627.50 0.00 z 882.47 a 424.50 155.00 59.50 30.00 3093.47
1898 0.00 35.00 18.50 205.00 378.00 587.00 0.00 z 420.50 o 426.72 a 101.50 12.50 14.50 1778.72
1899 9.09 b 0.00 4.13 a 138.00 289.50 519.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 960.22
1900 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
1901 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
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 z 0.00 z 0.00
1903 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
1904 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
1905 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
1906 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
1907 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
1908 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 31.50 n 106.03 a 5.50 111.53
1909 10.85 a 1.00 g 42.50 102.00 336.35 a 590.00 719.09 c 741.33 b 519.00 208.22 a 83.50 1.03 a 3353.87
1910 11.50 1.04 a 107.97 b 347.00 473.00 612.00 868.52 a 651.50 457.22 c 303.00 70.71 b 0.00 a 3903.46
1911 0.00 a 0.00 c 81.24 b 150.00 a 313.00 601.50 460.50 l 639.38 c 400.86 a 140.02 a 24.00 1.55 a 2351.55
1912 6.00 5.50 24.50 214.50 359.50 656.00 688.50 678.90 a 282.00 151.00 56.50 0.00 3122.90
1913 0.00 7.50 17.00 180.00 300.00 550.50 741.00 779.00 505.34 a 162.50 39.83 a 0.00 a 3282.67
1914 26.87 a 3.63 a 65.62 a 173.79 a 424.50 535.00 873.50 770.87 a 435.52 a 135.37 a 70.86 a 0.00 a 3515.52
1915 0.00 b 0.00 a 46.50 a 329.50 361.00 513.00 641.38 b 891.50 378.00 238.50 24.00 0.00 3423.38
1916 3.50 6.96 d 94.00 159.83 a 238.18 a 500.69 a 709.26 b 722.30 a 459.00 124.52 a 46.50 0.52 a 3065.25
1917 2.07 a 2.00 1.50 93.50 370.45 a 484.50 865.79 c 780.00 557.50 271.25 a 32.59 a 32.79 e 3493.93
1918 13.50 17.00 88.00 178.39 b 392.15 a 587.00 h 906.48 b 771.42 e 588.46 d 309.47 b 23.04 b 39.35 e 3327.26
1919 33.58 a 0.00 d 44.71 e 226.55 a 363.98 b 604.00 878.33 a 816.33 a 462.22 c 128.98 c 30.50 h 11.50 3570.20
1920 12.50 3.50 28.93 a 90.00 290.50 451.00 891.50 783.00 472.00 161.50 38.50 5.50 3228.43
1921 4.50 41.50 77.50 167.50 460.50 684.00 814.50 789.00 326.00 291.40 a 26.00 31.50 3713.90
1922 0.00 0.00 4.00 88.00 349.50 752.00 775.50 828.50 579.00 231.50 6.00 11.50 3625.50
1923 9.50 0.00 a 39.00 147.00 392.50 550.50 913.50 788.50 552.78 c 222.17 a 23.00 6.00 3644.44
1924 2.00 26.00 4.50 131.50 512.00 512.00 825.50 693.37 a 443.50 185.00 9.00 36.50 3380.87
1925 15.50 23.50 76.50 240.50 479.50 598.00 883.50 709.50 456.21 a 92.00 9.50 14.00 3598.21
1926 0.00 16.00 43.00 304.00 376.50 605.00 864.50 756.50 331.50 245.50 20.00 h 19.50 3562.00
1927 5.50 5.00 36.50 154.00 281.50 612.00 813.50 735.00 414.50 244.00 47.00 6.20 a 3354.70
1928 4.50 0.00 63.00 131.50 539.50 521.50 828.00 691.00 483.00 189.50 22.50 0.00 3474.00
1929 0.00 0.00 31.50 108.00 343.50 498.00 798.00 858.00 304.50 166.00 3.00 17.50 3128.00
1930 6.50 34.50 31.50 284.50 348.00 495.50 814.50 844.00 471.50 159.50 25.00 0.00 3515.00
1931 12.00 10.00 80.50 215.17 a 512.00 723.00 896.50 891.50 498.00 158.50 44.00 l 0.00 z 3997.17
1932 0.00 i 39.50 35.50 181.00 424.00 646.00 833.00 791.00 464.50 229.00 96.00 12.00 3751.50
1933 7.00 1.50 22.50 186.00 297.50 682.50 851.50 794.50 437.50 286.00 89.50 43.50 3699.50
1934 26.50 29.00 126.50 362.50 549.00 601.00 852.50 808.00 431.50 252.00 82.00 3.00 4123.50
1935 19.00 4.00 31.50 114.00 367.50 567.00 811.50 734.50 570.00 267.50 9.50 4.50 3500.50
1936 4.00 6.00 44.50 298.50 602.50 695.17 a 968.50 862.00 495.00 282.00 4.00 43.00 4305.17
1937 0.00 0.00 18.50 151.50 456.00 656.50 531.50 n 748.50 560.50 282.50 74.00 15.00 2963.00
1938 6.50 0.00 33.00 207.00 425.00 686.50 909.50 784.50 661.50 219.00 24.50 36.00 3993.00
1939 24.50 2.00 117.50 271.50 512.50 507.41 a 857.00 836.45 c 551.00 282.50 32.00 46.00 4040.36
1940 0.00 16.50 126.50 251.00 553.00 735.00 917.00 835.50 647.50 340.00 11.50 12.00 4445.50
1941 0.00 17.50 131.50 271.50 475.50 649.00 932.58 a 800.00 392.00 165.00 42.50 53.50 3930.58
1942 0.00 0.00 b 22.50 230.69 a 349.00 472.50 819.50 809.00 538.00 267.50 28.00 11.50 3548.19
1943 1.00 0.00 51.67 a 277.50 319.00 448.00 798.00 752.00 533.00 246.00 13.00 14.00 3453.17
1944 10.00 7.50 38.50 220.00 459.50 590.50 803.50 720.50 556.50 303.00 32.50 19.12 a 3761.12
1945 24.00 9.50 71.00 120.50 418.00 558.00 879.50 850.95 a 430.00 295.53 a 69.00 6.00 3731.98
1946 1.50 4.50 87.50 228.00 427.00 556.00 853.50 766.00 489.00 109.50 11.90 a 15.50 3549.90
1947 1.00 26.50 90.50 215.00 512.00 515.69 a 835.00 739.50 477.00 301.50 16.00 5.00 3734.69
1948 3.62 a 18.00 15.00 175.50 429.00 679.00 706.00 725.50 482.00 167.00 26.50 0.00 3427.12
1949 3.50 9.50 11.00 301.00 529.50 633.00 787.50 806.00 492.00 139.50 76.00 20.50 3809.00
1950 5.50 20.00 47.00 135.50 333.50 548.00 788.50 764.00 482.00 284.00 33.50 36.50 3478.00
1951 10.00 33.00 33.00 202.50 393.50 475.50 807.50 766.50 438.00 167.00 27.00 8.50 3362.00
1952 0.50 20.00 31.00 285.00 460.50 569.00 809.50 804.50 575.00 267.50 28.00 1.50 3852.00
1953 87.83 a 13.00 60.50 151.00 328.00 529.00 890.00 841.50 609.00 288.00 74.00 4.50 3876.33
1954 17.50 28.00 14.50 174.50 486.00 541.00 873.00 730.50 479.00 124.50 92.00 6.50 3567.00
1955 0.00 2.00 9.00 96.00 325.00 652.50 782.50 848.50 520.86 a 259.50 35.50 10.50 3541.86
1956 11.00 0.00 26.50 218.00 484.50 607.50 870.50 768.50 560.50 220.00 34.00 14.50 3815.50
1957 0.00 18.00 26.50 169.50 556.50 657.50 862.50 773.00 585.50 121.50 23.00 13.00 3806.50
1958 4.50 8.00 45.00 153.00 658.50 679.00 813.00 936.50 516.50 239.00 56.50 20.50 4130.00
1959 31.50 0.50 26.00 209.50 292.50 644.50 861.00 765.50 447.00 214.50 42.00 13.00 3547.50
1960 13.00 6.00 106.50 176.00 376.50 649.00 999.50 728.50 549.50 232.50 40.50 0.00 3877.50
1961 23.50 48.00 62.50 122.50 414.50 780.50 918.00 965.00 369.50 177.50 5.50 3.50 3890.50
1962 3.88 c 18.50 24.00 267.00 366.50 599.00 779.50 776.00 480.50 177.50 45.50 27.00 3564.88
1963 14.50 24.50 99.50 162.00 428.50 623.00 784.50 853.00 643.00 288.00 48.00 0.00 3968.50
1964 8.50 3.50 34.50 130.50 378.50 629.50 852.50 702.50 409.50 152.50 40.00 7.50 3349.50
1965 0.00 31.50 6.00 212.00 363.00 563.50 832.50 788.00 274.00 293.00 37.50 23.00 3424.00
1966 13.00 0.00 85.50 178.50 481.50 540.00 826.00 778.50 654.50 224.00 11.50 24.00 3817.00
1967 12.50 26.50 27.00 62.00 400.50 618.50 908.50 949.50 706.50 249.50 32.50 13.00 4006.50
1968 13.00 42.00 109.50 132.00 369.50 605.00 864.00 729.50 473.00 145.50 17.00 6.50 3506.50
1969 0.00 0.00 41.00 244.00 479.00 601.00 774.50 807.00 521.00 132.50 24.00 3.00 3627.00
1970 6.50 11.00 17.00 54.00 447.00 730.50 896.50 832.50 351.00 144.50 10.50 7.00 3508.00
1971 35.00 26.50 21.50 163.50 463.00 553.00 808.50 945.50 367.00 177.00 15.50 4.50 3580.50
1972 6.50 20.50 127.00 109.00 455.50 687.00 787.50 897.00 430.00 133.00 20.50 40.50 3714.00
1973 26.00 13.50 58.00 169.50 450.50 627.50 886.50 846.00 458.50 185.00 38.00 14.50 3773.50
1974 31.50 3.00 49.00 189.50 304.00 731.00 832.00 775.50 490.00 201.50 53.00 2.00 3662.00
1975 5.50 7.00 11.50 66.50 329.00 0.00 z 955.50 701.50 469.00 200.50 69.50 39.00 2854.50
1976 4.50 18.50 54.00 155.50 470.00 497.50 809.00 713.50 526.00 190.50 34.00 6.50 3479.50
1977 1.50 16.00 32.00 268.50 355.00 723.00 785.50 808.50 448.50 108.00 h 9.00 16.00 3463.50
1978 1.55 a 0.00 127.50 172.50 316.50 631.55 a 755.50 732.00 475.00 202.50 29.50 0.00 3444.10
1979 0.00 2.00 56.00 158.00 409.00 650.50 788.50 770.00 556.00 276.00 1.50 23.00 3690.50
1980 2.50 8.00 7.00 306.00 444.00 556.00 775.00 626.20 a 486.00 191.00 71.50 41.33 a 3514.53
1981 0.00 39.50 53.50 225.50 402.50 487.00 743.00 864.50 519.31 a 185.00 30.50 6.50 3556.81
1982 0.00 44.50 37.00 126.00 362.00 627.50 724.50 793.50 464.00 162.50 13.00 11.50 3366.00
1983 18.50 40.00 63.50 162.50 419.50 587.50 676.00 852.00 384.00 172.00 60.50 0.00 3436.00
1984 25.00 6.00 61.00 163.00 351.50 545.69 a 823.50 847.50 389.00 172.00 34.50 2.58 a 3421.27
1985 0.00 1.50 20.50 273.50 514.08 a 679.50 1021.00 715.00 369.31 a 165.00 32.00 0.00 3791.39
1986 15.50 24.00 179.00 207.50 474.50 795.00 0.00 z 907.00 384.50 147.50 22.00 0.00 3156.50
1987 0.00 3.50 58.00 350.50 549.50 687.00 765.00 676.50 570.00 202.00 52.00 52.00 3966.00
1988 13.95 a 15.00 81.00 269.00 479.00 756.50 886.50 860.50 573.00 379.00 70.50 7.50 4391.45
1989 13.50 0.00 26.00 258.50 440.00 707.00 909.00 749.50 490.00 214.50 98.50 6.50 3913.00
1990 17.50 23.50 58.00 266.00 381.00 611.50 882.50 834.50 670.00 207.00 100.50 0.50 4052.50
1991 2.00 37.00 23.50 174.00 389.00 542.50 864.50 899.50 543.50 271.00 10.50 10.00 3767.00
1992 22.00 12.00 91.50 262.00 523.00 744.50 740.00 794.50 462.50 262.50 13.50 0.00 3928.00
1993 1.50 0.00 93.50 182.50 553.00 579.00 586.50 711.00 466.00 247.50 10.00 23.50 3454.00
1994 22.00 8.00 105.00 248.50 495.00 606.50 919.50 901.00 609.50 192.00 8.50 34.00 4149.50
1995 11.00 89.50 65.00 143.50 428.50 566.50 836.00 744.50 539.00 171.50 99.50 13.00 3707.50
1996 10.50 30.50 30.50 205.00 294.50 629.00 882.50 820.00 477.50 224.00 9.00 6.00 3619.00
1997 0.00 z 14.00 107.00 0.00 z 506.50 563.65 d 481.50 k 499.50 m 380.50 i 213.00 34.00 4.00 m 1438.15
1998 0.00 p 3.50 20.50 i 176.00 j 465.50 554.00 956.00 899.50 716.50 173.50 44.00 28.00 3840.50
1999 25.50 8.50 103.50 147.50 358.50 582.50 776.00 889.00 457.50 215.50 97.50 10.00 3671.50
2000 0.00 3.50 58.50 237.50 405.50 582.00 853.00 838.00 471.00 156.00 2.00 0.00 a 3607.00
2001 0.00 0.00 33.00 140.00 490.50 547.00 832.50 896.00 648.50 175.50 78.10 a 1.50 p 3841.10
2002 18.50 10.50 21.50 140.00 326.50 612.00 943.50 749.00 571.00 175.00 40.50 15.50 3623.50
2003 26.50 3.50 87.00 217.50 400.00 678.50 1008.50 930.00 595.00 327.50 21.00 1.00 4296.00
2004 2.00 7.50 161.00 277.00 376.50 624.50 928.50 863.00 499.00 250.00 33.50 6.00 o 4022.50
2005 17.00 k 12.50 i 99.50 203.50 436.00 549.60 e 913.00 717.00 f 528.50 182.50 g 34.00 i 2.50 k 2730.10
2006 20.27 e 14.50 47.07 d 245.50 487.50 710.00 1002.50 857.00 560.50 238.50 87.50 7.50 4278.34
2007 5.50 7.50 173.50 224.50 472.50 680.00 1109.00 826.50 550.50 264.00 64.00 9.00 4386.50
2008 1.00 12.50 15.00 96.50 428.50 566.00 891.00 833.50 511.00 223.50 80.00 8.00 3666.50
2009 6.50 10.00 34.00 180.00 433.00 636.50 860.50 809.50 644.50 137.50 33.00 4.50 3789.50
2010 13.00 10.00 67.00 165.00 341.50 0.00 z 794.00 781.50 502.00 241.50 55.50 10.50 2981.50
Period of Record Statistics
MEAN 9.97 13.62 55.54 193.55 418.01 606.30 842.16 797.28 493.69 210.82 40.02 13.78 3691.02
S.D. 12.21 14.92 39.08 66.61 83.18 76.47 82.11 71.43 88.82 59.46 27.41 13.99 294.65
SKEW 2.93 1.79 0.98 0.30 0.34 0.20 0.01 0.08 0.06 0.29 0.70 1.15 0.52
MAX 87.83 89.50 179.00 362.50 658.50 795.00 1109.00 965.00 716.50 379.00 106.03 53.50 4445.50
MIN 0.00 0.00 1.50 54.00 238.18 448.00 586.50 626.20 274.00 92.00 1.50 0.00 3065.25
NO YRS 101 104 105 104 106 103 98 101 104 103 102 101 85