HUNTLEY EXP STN, MONTANA

Monthly Total Growing Degree Days

(244345)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1911 0.00 0.00 88.50 148.50 465.00 800.00 856.50 766.00 520.50 200.50 4.00 2.00 3851.50
1912 0.00 1.50 14.00 224.00 442.00 768.00 848.50 821.00 351.00 188.50 61.50 2.00 3722.00
1913 3.10 a 21.50 19.00 221.50 415.00 776.50 873.00 875.50 539.48 a 147.00 42.00 0.00 3933.58
1914 5.00 1.50 61.50 211.50 464.00 697.00 1039.00 846.00 574.50 250.00 98.00 0.00 4248.00
1915 1.50 0.00 35.00 426.00 418.50 a 532.50 728.50 901.50 420.50 290.50 42.50 0.00 3797.00
1916 0.00 20.50 133.50 184.50 348.50 653.50 1033.50 866.00 493.50 140.50 31.50 1.50 3907.00
1917 0.00 18.00 4.50 111.00 337.00 599.50 1078.50 869.50 582.00 233.50 132.00 17.50 3983.00
1918 35.50 2.00 148.50 123.00 396.00 876.00 903.00 846.50 483.00 324.00 6.50 17.00 4161.00
1919 24.00 0.52 a 60.00 234.00 552.50 900.00 1028.50 953.50 577.00 110.00 25.00 12.50 4477.52
1920 0.00 6.00 31.50 63.00 402.00 667.50 1010.50 934.50 580.00 265.00 21.00 2.50 3983.50
1921 2.50 58.00 80.50 192.50 412.50 808.50 960.00 945.50 463.00 330.00 77.00 12.50 4342.50
1922 0.00 0.00 19.00 156.00 433.50 763.00 907.00 1039.50 634.00 297.00 22.00 2.50 4273.50
1923 12.50 5.00 31.00 151.50 464.50 672.50 1057.50 849.00 581.00 191.00 54.00 0.50 4070.00
1924 1.00 29.50 4.00 162.00 373.00 619.00 900.50 809.00 528.00 274.50 35.00 19.00 3754.50
1925 3.50 11.00 100.50 283.00 492.50 690.00 947.05 a 865.50 540.50 83.00 12.00 39.00 4067.55
1926 1.00 26.44 a 72.00 352.00 570.00 747.00 1024.50 865.00 346.00 341.00 52.50 4.00 4401.44
1927 0.50 0.00 41.00 184.50 322.50 646.00 874.50 796.50 483.50 304.50 24.00 0.00 3677.50
1928 8.00 0.00 104.00 165.00 648.50 605.50 928.00 799.50 509.50 203.00 37.00 4.00 4012.00
1929 0.00 0.00 42.00 163.00 397.50 671.00 1001.50 1015.00 409.00 312.50 17.50 2.00 4031.00
1930 0.00 53.50 20.50 393.00 460.50 709.50 1040.50 990.00 569.50 152.00 54.00 3.50 4446.50
1931 20.50 12.00 63.00 239.00 497.00 881.00 1014.00 956.00 593.50 244.50 76.50 0.00 4597.00
1932 0.00 70.00 38.50 229.50 533.00 724.50 967.50 938.00 516.00 169.50 32.00 8.00 4226.50
1933 6.00 0.00 59.50 177.50 413.50 900.50 1045.50 863.00 521.50 285.50 81.00 13.50 4367.00
1934 17.50 41.00 90.50 303.00 716.50 741.50 1012.00 865.50 440.00 335.00 99.50 5.50 4667.50
1935 29.50 38.00 28.00 162.50 354.50 652.00 1005.00 817.37 a 588.50 282.50 19.00 2.50 3979.37
1936 3.50 2.00 45.50 249.83 a 678.00 872.00 1209.50 970.00 575.00 321.00 73.00 7.50 5006.83
1937 0.00 0.00 38.00 208.00 593.00 691.00 1039.00 941.00 622.00 312.50 42.00 0.00 4486.50
1938 10.00 19.00 47.50 263.50 403.00 755.00 915.50 820.50 688.50 323.50 17.00 19.00 4282.00
1939 5.00 0.00 115.00 274.50 564.00 589.00 1001.50 849.50 548.00 262.50 64.50 80.50 4354.00
1940 0.00 4.00 86.00 162.00 585.50 779.48 a 1039.00 957.50 748.50 369.00 8.00 26.50 4765.48
1941 3.00 14.00 67.50 190.00 544.00 716.00 980.00 919.00 407.50 193.50 73.00 21.00 4128.50
1942 1.50 0.00 30.00 253.00 368.00 607.76 a 963.00 850.50 559.50 299.50 43.50 12.00 3988.26
1943 7.50 27.50 62.50 327.50 370.50 637.00 967.50 914.50 520.00 325.50 24.00 3.50 4187.50
1944 9.00 5.50 27.38 a 210.00 a 585.00 577.00 861.50 804.97 a 515.00 324.00 15.00 4.50 3938.85
1945 0.00 4.50 75.00 126.00 353.50 544.50 962.00 885.00 452.50 334.00 31.50 0.50 3769.00
1946 0.00 10.00 113.00 342.41 a 378.50 685.00 1011.00 851.00 525.00 124.50 10.50 0.00 a 4050.91
1947 12.50 14.50 35.50 210.50 458.50 570.00 1026.00 929.00 539.00 344.00 23.00 3.62 a 4166.12
1948 7.50 17.61 a 19.00 255.50 530.50 714.00 924.50 963.00 667.50 275.00 17.50 2.00 4393.61
1949 17.00 2.00 21.50 345.00 583.50 694.50 900.50 924.50 534.50 117.80 a 170.50 2.50 4313.80
1950 0.00 3.11 a 28.50 167.50 335.50 611.90 a 806.50 813.00 483.00 316.00 30.00 12.00 3607.01
1951 0.00 11.50 12.50 160.00 495.50 520.00 951.50 834.00 418.50 207.50 10.50 5.00 3626.50
1952 0.00 z 8.50 15.50 326.00 506.00 745.50 849.00 897.50 648.50 280.50 16.50 1.00 4294.50
1953 16.50 21.00 71.50 137.59 a 348.50 672.00 951.00 889.50 619.00 399.00 93.21 b 2.58 a 4221.38
1954 5.00 51.50 22.00 148.50 435.00 593.00 1020.00 832.50 559.50 222.50 125.50 11.50 4026.50
1955 0.00 0.00 22.00 156.00 454.50 645.00 921.00 959.50 531.00 330.00 32.00 1.00 4052.00
1956 0.00 0.00 81.00 113.50 503.00 847.24 a 932.00 842.17 a 583.50 298.50 59.00 44.50 4304.41
1957 0.00 13.00 28.42 a 117.00 511.50 654.00 1008.00 900.03 a 542.00 212.35 a 25.00 25.00 4036.30
1958 2.00 4.00 25.00 149.50 682.00 c 578.50 779.00 986.00 579.00 287.50 59.00 23.00 4154.50
1959 0.00 0.00 51.50 160.50 326.50 774.00 917.50 904.00 521.00 194.50 47.00 9.00 3905.50
1960 1.50 3.00 129.00 175.50 469.00 711.50 1045.00 853.00 568.50 301.50 35.00 7.50 4300.00
1961 22.00 76.50 87.50 169.00 534.50 872.00 1005.50 1038.00 383.00 243.00 20.50 0.00 4451.50
1962 26.50 36.50 36.00 316.00 472.00 724.00 863.00 861.50 546.50 397.50 80.50 24.00 4384.00
1963 14.50 40.50 122.50 206.50 502.50 724.00 992.00 973.00 782.00 464.00 39.00 7.00 4867.50
1964 3.00 10.00 45.00 216.50 537.50 666.00 1048.00 843.50 492.00 335.50 40.00 0.00 4237.00
1965 3.50 31.00 6.50 192.00 440.50 662.50 947.00 869.00 262.50 375.50 57.93 a 6.00 3853.93
1966 0.00 0.00 100.50 152.50 544.00 694.00 1052.00 814.00 686.00 258.50 1.00 10.00 4312.50
1967 10.00 29.00 61.50 144.00 444.00 634.82 b 986.50 939.50 686.00 331.00 59.00 2.50 4327.82
1968 11.88 a 29.00 134.50 167.50 425.50 646.00 929.50 825.50 577.50 296.50 25.00 0.00 4068.38
1969 0.50 0.00 37.00 348.50 519.00 618.00 909.50 964.50 643.50 133.50 58.50 3.10 a 4235.60
1970 0.00 a 1.68 c 15.50 87.50 504.50 801.43 b 965.50 944.50 473.89 c 198.00 31.00 1.50 4025.00
1971 0.50 4.50 60.00 180.50 507.00 731.50 859.00 1061.00 497.50 269.50 59.00 0.00 4230.00
1972 0.00 c 13.50 184.50 206.50 499.50 800.00 811.50 941.50 465.00 225.50 16.00 11.50 4175.00
1973 5.00 13.50 49.50 129.50 472.75 c 758.50 910.00 960.00 544.00 329.00 21.21 a 1.50 4194.46
1974 23.00 8.50 107.50 293.50 371.50 767.50 1025.00 772.00 485.00 339.00 12.00 2.50 4207.00
1975 3.00 0.00 10.00 105.50 380.50 629.50 1031.50 826.50 549.64 b 252.50 103.20 e 10.00 3901.84
1976 13.00 26.00 45.50 234.50 490.50 597.50 952.00 840.10 a 534.64 b 175.50 56.25 b 9.50 3974.99
1977 0.00 d 29.00 43.50 288.10 a 502.20 a 805.50 908.50 768.00 495.50 239.00 21.00 2.07 a 4102.37
1978 0.00 0.00 92.50 216.50 429.50 652.50 b 820.98 a 782.50 573.50 216.50 54.50 0.00 3838.98
1979 0.00 0.00 22.50 120.00 a 374.58 a 694.29 b 891.00 814.00 607.00 291.00 13.50 20.50 3848.37
1980 0.00 11.50 21.00 300.00 542.00 690.50 935.50 721.00 530.17 a 258.50 86.50 61.50 4158.17
1981 7.00 43.50 79.71 c 273.62 a 425.00 613.50 903.81 b 904.17 a 564.23 d 136.73 c 88.50 14.98 a 4054.76
1982 0.00 a 33.00 26.50 146.50 352.00 595.00 829.00 917.50 483.50 183.00 9.00 0.00 3575.00
1983 8.50 18.50 71.50 160.00 382.50 636.00 895.50 1056.00 506.50 230.50 63.50 0.00 4029.00
1984 17.50 17.00 54.00 168.00 419.53 a 643.00 963.00 1002.50 438.00 212.00 8.00 3.00 3945.53
1985 0.00 2.00 42.50 291.00 588.50 629.00 959.50 764.67 a 398.00 190.50 35.00 0.00 3900.67
1986 12.50 19.00 184.50 206.90 a 403.50 867.50 841.50 839.00 386.50 266.50 19.66 a 1.50 4048.55
1987 2.50 17.50 89.38 a 364.00 593.50 770.00 860.25 c 734.50 548.50 218.00 71.50 13.36 b 4283.00
1988 2.00 29.00 106.50 245.00 560.00 986.50 986.50 850.00 481.00 316.00 51.00 12.00 4625.50
1989 0.00 0.00 29.50 195.50 419.00 655.50 984.00 809.50 512.00 224.50 65.00 16.50 3911.00
1990 6.00 14.00 55.50 245.50 377.00 697.00 884.00 898.50 688.50 213.50 117.50 16.50 4213.50
1991 0.50 46.00 50.50 175.00 464.00 707.00 924.50 981.00 567.50 284.50 25.00 4.50 4230.00
1992 6.00 52.00 136.50 255.00 522.50 711.00 728.50 0.00 z 525.00 269.50 15.50 0.00 a 3221.50
1993 0.00 z 0.00 z 0.00 z 0.00 z 540.50 653.50 670.50 719.00 437.00 240.00 21.50 4.00 3286.00
1994 0.00 2.00 118.00 258.50 565.50 697.00 903.00 951.50 627.00 184.50 16.00 11.50 4334.50
1995 1.00 83.50 94.50 128.00 343.50 675.00 859.50 883.00 551.00 227.00 0.00 z 0.00 z 3846.00
1996 0.00 z 13.50 t 15.00 p 165.50 n 192.00 p 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1997 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 875.75 a 886.50 643.00 253.50 34.50 0.50 2693.75
1998 3.50 11.50 73.50 245.00 515.50 557.50 1067.50 1011.00 787.00 262.00 38.00 11.50 4583.50
1999 5.50 32.50 121.50 181.00 434.50 685.00 913.50 956.50 468.50 255.50 151.50 17.50 4223.00
2000 0.00 24.00 89.00 256.00 0.00 z 686.50 1045.50 960.00 569.50 222.00 11.00 0.00 3863.50
2001 3.50 0.00 60.50 368.00 557.50 701.50 1028.50 1018.00 667.50 209.50 115.00 0.00 4729.50
2002 13.50 18.50 13.50 155.50 400.00 741.50 1069.00 785.00 582.00 144.00 92.50 7.50 4022.50
2003 0.00 z 1.50 88.50 298.50 450.50 665.50 1078.50 1041.50 521.50 380.00 25.00 0.00 4551.00
2004 0.00 5.50 127.50 278.50 402.50 599.00 934.50 807.00 519.00 209.00 52.50 21.50 3956.50
2005 30.50 38.50 91.50 0.00 z 403.50 669.50 969.00 843.00 554.00 0.00 z 67.00 13.00 3679.50
2006 15.50 17.00 41.50 273.00 506.50 786.50 1073.00 894.50 506.50 164.50 62.50 3.00 4344.00
2007 0.00 4.50 180.50 192.00 513.00 724.50 1123.00 918.00 616.00 264.50 93.00 4.00 4633.00
2008 2.00 7.50 31.00 140.50 440.50 663.50 991.00 949.00 481.50 238.00 89.00 9.00 4042.50
2009 23.00 22.00 68.50 191.00 463.50 614.00 875.50 840.00 690.00 96.50 39.50 1.50 3925.00
2010 0.00 0.00 109.50 204.00 370.00 704.50 937.50 941.50 572.00 413.00 88.00 0.00 4340.00
2011 7.20 c 12.00 h 62.00 c 160.00 373.07 b 710.50 1071.50 1047.28 a 672.69 d 352.50 42.50 14.50 4513.74
2012 27.50 1.50 208.00 312.32 b 453.63 a 804.50 1133.00 955.50 640.50 203.00 70.00 12.00 4821.45
2013 4.50 5.00 69.75 a 0.50 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 79.25
Period of Record Statistics
MEAN 6.22 15.95 65.19 213.60 465.93 699.07 953.35 891.10 542.78 256.24 48.36 8.83 4165.32
S.D. 8.42 18.34 44.00 74.09 84.99 89.32 90.34 79.03 90.22 75.04 34.41 12.45 287.17
SKEW 1.56 1.51 0.97 0.60 0.52 0.63 -0.31 0.12 0.03 0.01 1.09 3.11 0.49
MAX 35.50 83.50 208.00 426.00 716.50 986.50 1209.50 1061.00 787.00 464.00 170.50 80.50 5006.83
MIN 0.00 0.00 4.00 63.00 322.50 520.00 670.50 719.00 262.50 83.00 1.00 0.00 3575.00
NO YRS 98 99 100 98 99 100 101 100 101 100 100 100 92