KALISPELL WSO AIRPORT, MONTANA

Monthly Total Growing Degree Days

(244558)

Base Temperature = 40 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1899 0.00 z 0.00 z 0.00 z 0.00 z 251.50 461.00 744.50 499.50 450.00 91.50 42.00 13.50 2553.50
1900 1.50 0.00 66.50 243.50 386.00 646.50 724.50 569.50 364.00 133.50 0.50 4.50 3140.50
1901 1.00 6.50 13.00 113.50 450.50 341.00 758.50 796.00 272.00 243.50 10.50 0.00 3006.00
1902 10.50 0.50 3.00 65.50 364.00 433.00 615.50 667.00 324.50 193.00 2.00 0.00 2678.50
1903 0.50 0.00 18.50 83.00 251.00 643.00 626.00 692.50 325.00 155.50 30.00 1.50 2826.50
1904 0.50 0.00 4.00 191.50 359.50 485.00 782.50 697.50 470.50 165.50 38.50 1.00 3196.00
1905 0.00 5.00 67.50 172.00 309.00 474.00 799.00 768.50 490.00 84.00 5.50 0.00 3174.50
1906 0.50 0.50 55.00 221.00 341.50 462.50 898.00 733.50 481.00 248.50 20.50 0.00 3462.50
1907 0.00 7.50 8.00 84.50 360.50 478.00 716.50 588.50 378.50 275.50 11.50 0.00 2909.00
1908 0.00 0.50 27.50 187.00 282.00 486.00 810.00 678.00 477.00 137.00 37.50 0.00 3122.50
1909 0.00 0.00 9.00 37.00 269.00 568.00 686.50 673.00 460.50 166.00 39.50 0.00 2908.50
1910 0.50 0.00 82.50 246.50 456.50 585.00 825.50 592.00 373.00 239.00 23.50 0.00 3424.00
1911 0.00 0.00 60.00 123.00 270.50 605.00 703.00 630.50 331.50 136.50 1.00 0.00 2861.00
1912 0.00 0.00 7.00 177.00 393.50 641.00 636.50 613.50 250.50 92.50 19.00 0.00 2830.50
1913 0.00 2.00 0.00 127.50 344.50 621.50 675.00 723.00 403.00 77.00 15.50 0.00 2989.00
1914 2.00 0.00 26.00 143.50 405.00 518.50 828.00 716.50 377.50 124.50 37.50 0.00 3179.00
1915 0.00 0.00 33.00 267.50 352.00 474.50 620.50 902.00 343.50 194.00 12.00 0.50 3199.50
1916 3.00 0.00 32.00 115.00 220.50 461.00 704.50 669.50 390.00 65.50 12.00 0.00 2673.00
1917 0.00 0.00 0.00 34.00 350.00 464.00 850.50 728.50 505.50 221.00 27.50 4.50 3185.50
1918 0.50 6.00 31.00 128.00 258.50 665.50 766.00 623.50 504.50 232.50 7.50 9.00 3232.50
1919 17.50 0.00 25.50 195.50 341.50 605.50 837.00 775.00 427.00 83.50 13.00 3.50 3324.50
1920 6.00 0.00 7.50 57.00 251.00 468.50 915.00 730.00 428.50 120.50 6.00 0.50 2990.50
1921 0.00 14.00 22.00 102.50 404.00 626.50 777.00 743.00 271.00 204.00 17.50 8.50 3190.00
1922 0.00 0.00 1.50 63.50 322.00 711.50 765.50 800.00 532.50 241.50 0.50 2.50 3441.00
1923 0.00 0.00 28.50 121.50 333.50 543.50 870.00 742.00 511.00 192.00 3.50 0.00 3345.50
1924 0.50 7.00 0.00 115.50 477.50 499.00 793.50 657.50 414.00 152.00 3.00 35.00 3154.50
1925 2.50 12.00 33.00 210.50 443.50 585.00 926.50 675.00 420.00 45.00 3.00 4.00 3360.00
1926 0.00 3.50 34.50 300.00 368.50 618.00 885.50 696.00 245.00 202.00 15.50 4.00 3372.50
1927 0.00 0.50 5.50 118.00 253.00 565.00 780.50 706.00 386.00 193.00 16.00 2.50 3026.00
1928 4.00 0.00 35.50 78.00 513.00 495.50 793.00 643.50 453.50 132.50 11.50 0.00 3160.00
1929 0.00 0.00 11.50 90.00 338.00 521.00 812.50 864.50 348.50 193.50 3.00 0.00 3182.50
1930 0.00 21.00 18.50 281.50 351.00 525.50 851.50 867.00 507.00 123.50 16.50 0.00 3563.00
1931 1.50 1.00 32.50 163.50 453.50 630.00 843.00 839.00 443.00 147.00 22.00 0.00 3576.00
1932 0.00 15.00 14.50 129.00 394.50 634.50 800.00 781.50 444.50 141.50 28.00 8.00 3391.00
1933 2.00 0.00 7.50 140.50 277.50 656.00 826.00 760.50 371.50 207.00 42.50 20.50 3311.50
1934 4.50 7.00 61.50 350.50 533.00 575.50 838.00 805.00 374.50 203.00 46.50 0.00 3799.00
1935 5.50 0.00 15.50 69.00 338.00 525.50 783.00 686.00 524.00 209.00 1.00 0.00 3156.50
1936 0.00 2.50 22.00 260.00 585.50 642.00 953.50 822.00 428.50 188.50 0.50 6.50 3911.50
1937 0.00 0.00 0.00 95.50 412.00 569.00 868.00 681.00 543.00 228.00 25.50 4.00 3426.00
1938 0.00 0.00 10.00 175.00 358.50 642.00 866.50 755.50 673.00 192.50 5.50 10.00 3688.50
1939 7.00 0.00 65.00 210.00 455.00 443.50 846.00 805.00 485.50 239.00 8.50 14.50 3579.00
1940 0.00 0.00 74.50 167.00 495.00 688.50 873.00 828.50 624.00 261.50 0.50 2.50 4015.00
1941 0.00 3.00 65.00 229.50 413.00 624.00 908.50 755.00 316.50 134.50 36.50 12.50 3498.00
1942 0.00 0.00 11.50 177.00 322.00 441.50 792.00 765.00 482.00 196.50 3.50 3.50 3194.50
1943 1.50 0.00 25.50 233.00 284.50 419.50 769.00 730.00 496.00 221.50 1.00 5.50 3187.00
1944 0.00 1.50 14.00 165.50 423.50 568.50 796.00 689.00 495.00 284.00 6.50 3.00 3446.50
1945 7.00 5.00 17.00 65.50 376.00 505.00 855.00 821.00 365.00 235.00 23.00 0.50 3275.00
1946 0.00 0.00 40.50 177.50 372.00 539.50 838.50 748.50 412.50 73.00 0.00 1.00 3203.00
1947 0.50 3.50 40.50 177.00 465.50 470.00 861.00 694.00 434.00 222.00 7.00 0.00 3375.00
1948 1.50 5.50 5.00 121.50 390.50 652.50 677.50 691.00 444.50 139.50 2.00 0.00 3131.00
1949 0.00 0.00 2.00 212.00 485.00 524.00 737.00 782.00 455.00 57.00 37.00 0.50 3291.50
1950 1.00 0.00 0.50 68.50 282.50 523.50 755.50 734.50 450.00 167.00 11.00 1.00 2995.00
1951 0.00 8.00 9.50 127.50 344.50 434.00 778.50 661.00 360.50 125.00 0.50 0.50 2849.50
1952 0.00 0.00 3.50 223.50 419.00 535.00 694.00 725.00 500.00 202.00 4.50 0.00 3306.50
1953 15.00 1.50 23.00 105.50 309.00 481.50 761.00 736.50 493.50 187.00 17.50 0.00 3131.00
1954 0.50 0.00 2.50 69.00 396.50 440.00 730.50 622.50 391.00 83.00 38.00 0.00 2773.50
1955 0.00 0.00 0.00 43.00 207.50 580.00 729.50 724.00 393.50 158.00 5.00 0.50 2841.00
1956 0.00 0.00 10.50 140.00 456.50 519.00 804.00 685.50 423.00 161.50 8.00 0.00 3208.00
1957 0.00 0.00 5.50 123.00 508.50 569.50 759.50 713.50 463.50 93.50 0.50 0.00 3237.00
1958 0.00 0.00 18.00 99.50 628.50 645.00 781.50 874.50 433.00 148.00 17.50 3.50 3649.00
1959 0.00 0.00 0.50 121.50 232.00 575.50 767.00 616.00 389.00 109.50 8.50 0.50 2820.00
1960 0.00 0.00 8.00 109.50 314.00 538.50 923.50 651.50 438.50 131.00 5.00 0.00 3119.50
1961 0.50 13.50 32.50 73.00 391.50 726.50 895.50 902.50 273.50 100.00 0.00 0.00 3409.00
1962 1.00 4.50 3.00 177.50 330.50 530.00 705.50 682.00 416.00 110.50 21.00 0.00 2981.50
1963 0.00 3.00 34.50 137.50 319.50 559.50 713.00 781.00 564.50 207.00 9.00 0.00 3328.50
1964 0.00 0.00 2.00 55.50 304.00 504.00 743.50 569.50 302.50 100.00 7.00 0.00 2588.00
1965 0.00 0.00 1.00 124.50 253.00 479.00 759.00 723.50 166.00 170.00 14.00 6.00 2696.00
1966 0.00 0.00 41.00 102.50 404.50 443.00 756.50 668.00 579.00 82.00 0.00 0.00 3076.50
1967 0.00 1.00 0.00 27.00 326.50 560.50 798.00 858.00 583.50 156.50 13.00 0.00 3324.00
1968 0.00 1.50 46.50 80.50 307.00 538.50 789.00 674.50 393.00 68.00 1.00 0.00 2899.50
1969 0.00 0.00 4.50 187.50 428.50 537.50 683.50 708.50 470.00 71.50 8.00 0.00 3099.50
1970 0.00 0.00 3.00 50.00 376.00 670.50 808.00 751.00 276.50 76.00 1.50 0.00 3012.50
1971 8.50 8.50 10.00 121.00 424.00 443.00 716.00 893.00 279.00 120.00 4.00 0.00 3027.00
1972 0.00 1.00 60.50 58.50 397.50 587.00 697.00 853.50 350.00 81.00 1.00 6.50 3093.50
1973 0.00 5.00 30.00 113.50 383.50 563.50 839.50 796.50 441.50 141.50 5.50 0.00 3320.00
1974 6.50 0.00 20.50 159.00 258.00 700.50 801.50 719.50 414.50 107.50 12.00 0.00 3199.50
1975 0.00 0.00 0.00 47.50 309.50 484.50 925.50 665.50 435.50 142.50 47.50 19.00 3077.00
1976 0.00 0.00 20.50 153.00 415.00 487.00 762.50 707.50 501.50 114.00 12.00 0.00 3173.00
1977 0.00 3.50 7.50 218.50 323.50 644.50 728.50 730.00 366.00 80.00 1.50 0.00 3103.50
1978 0.00 0.00 55.50 133.50 277.00 584.00 759.00 667.00 418.50 116.50 19.50 0.00 3030.50
1979 0.00 0.00 6.00 120.00 362.50 609.00 858.00 846.50 555.00 193.00 0.00 19.00 3569.00
1980 0.00 0.00 0.00 265.50 476.00 526.00 737.00 600.50 464.00 156.50 42.00 10.50 3278.00
1981 0.00 8.00 37.50 174.00 389.50 412.50 712.50 864.50 457.50 73.00 6.50 0.00 3135.50
1982 0.00 0.00 6.50 59.50 272.50 611.00 666.00 717.00 399.00 78.00 0.00 2.00 2811.50
1983 0.00 1.50 21.50 103.50 356.50 518.00 655.50 816.50 322.50 103.50 18.50 0.00 2917.50
1984 2.00 0.00 10.00 108.50 266.00 497.50 787.50 793.50 328.00 119.50 1.50 0.00 2914.00
1985 0.00 0.00 0.00 171.00 442.00 512.50 883.50 601.50 253.00 87.00 18.50 0.00 2969.00
1986 1.00 2.00 50.50 133.50 440.50 729.50 626.00 863.00 336.00 111.50 3.00 0.00 3296.50
1987 0.00 0.00 11.00 258.00 457.00 663.00 745.00 641.50 494.00 120.00 34.50 4.50 3428.50
1988 0.00 3.50 29.00 247.50 363.00 674.50 770.50 749.50 429.00 290.50 22.00 0.00 3579.00
1989 7.00 0.00 6.50 162.00 331.50 615.00 850.50 679.50 398.50 114.00 41.00 0.00 3205.50
1990 2.00 4.50 24.00 191.00 311.50 529.50 829.00 799.50 594.00 75.00 33.50 0.00 3393.50
1991 0.00 0.50 8.00 103.50 321.00 440.50 738.50 806.50 443.00 149.50 4.00 1.00 3016.00
1992 0.00 2.50 50.00 189.50 441.00 685.00 679.00 702.50 353.50 206.00 5.00 0.00 3314.00
1993 0.00 0.00 29.00 126.00 555.50 507.00 538.00 630.00 371.00 158.50 5.50 0.00 2920.50
1994 0.00 0.00 20.00 174.50 389.50 489.00 820.50 814.50 468.50 89.00 0.00 0.00 3265.50
1995 0.00 23.00 11.88 a 73.50 370.00 491.00 700.50 573.00 435.00 72.00 17.50 0.00 2767.38
1996 0.00 1.50 0.00 116.50 222.00 553.00 761.00 694.50 345.00 127.50 0.00 0.00 2821.00
1997 0.00 0.00 4.00 70.00 383.50 520.00 691.00 747.00 468.00 126.00 3.00 1.50 3014.00
1998 1.50 0.00 14.00 165.00 452.50 505.00 871.50 782.50 578.50 87.50 14.50 0.00 3472.50
1999 0.00 0.50 51.50 119.50 278.00 474.00 659.50 807.50 346.50 110.50 34.14 a 0.00 2881.64
2000 0.00 0.00 8.00 158.00 325.50 512.50 740.00 729.50 364.00 112.50 0.00 0.00 2950.00
2001 0.50 0.00 12.00 109.50 400.50 460.50 691.50 773.50 554.50 68.50 18.00 0.00 3089.00
2002 1.50 1.00 9.00 112.00 265.50 544.00 855.00 656.00 440.00 72.50 12.50 0.00 2969.00
2003 0.50 0.00 41.50 157.00 349.00 607.50 885.50 851.50 493.00 202.50 8.00 0.00 3596.00
2004 0.00 0.00 51.00 160.50 333.50 545.50 820.50 783.50 376.50 131.50 1.00 0.50 3204.00
2005 0.00 0.00 24.00 122.00 366.50 468.50 744.00 680.00 379.00 105.50 5.50 0.00 2895.00
2006 0.00 a 3.50 8.50 139.50 400.50 620.17 a 536.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1172.17
Period of Record Statistics
MEAN 1.22 2.18 21.40 141.62 366.26 548.47 777.50 728.99 421.88 146.64 13.48 2.47 3175.53
S.D. 2.91 4.24 20.23 64.37 81.46 79.60 79.92 82.87 88.37 58.40 13.20 5.35 269.66
SKEW 3.45 2.80 1.03 0.62 0.49 0.22 -0.19 -0.02 0.00 0.44 0.99 3.36 0.42
MAX 17.50 23.00 82.50 350.50 628.50 729.50 953.50 902.50 673.00 290.50 47.50 35.00 4015.00
MIN 0.00 0.00 0.00 27.00 207.50 341.00 538.00 499.50 166.00 45.00 0.00 0.00 2588.00
NO YRS 107 107 107 107 108 108 107 107 107 107 107 107 106