FORT COLLINS, COLORADO

Monthly Total Growing Degree Days

(053005)

Base Temperature = 40 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200602
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
1900 4.50 2.50 79.50 151.50 550.00 812.50 865.00 867.50 560.00 329.50 62.00 8.50 4293.00
1901 10.50 11.50 52.00 209.00 527.00 698.50 1006.00 897.50 571.00 299.50 58.00 16.00 4356.50
1902 4.00 16.00 13.50 196.00 499.50 707.50 807.00 889.50 417.00 f 276.00 40.00 0.00 3449.00
1903 28.50 0.00 32.00 203.00 378.50 578.50 882.00 872.50 508.00 300.00 48.00 7.00 3838.00
1904 0.00 78.50 82.00 210.00 425.50 597.00 795.50 839.50 576.00 276.50 65.50 16.00 3962.00
1905 0.00 12.50 112.50 164.00 380.00 742.50 795.00 876.50 615.00 185.50 50.00 0.00 3933.50
1906 11.00 15.00 22.00 228.00 467.50 655.00 773.00 842.50 560.00 249.50 77.00 23.50 3924.00
1907 0.00 36.50 171.02 a 171.00 311.00 622.50 861.00 834.00 565.00 307.00 30.50 5.00 3914.52
1908 3.50 4.23 e 127.50 256.50 381.00 643.50 856.00 789.00 661.00 253.50 52.00 0.00 4027.73
1909 20.50 1.00 33.00 143.00 367.00 729.50 940.50 939.00 562.50 300.50 113.50 2.50 4152.50
1910 15.00 9.85 a 229.00 309.50 430.00 736.50 954.00 843.00 645.50 377.00 79.50 2.00 4630.85
1911 44.00 5.50 123.50 221.50 495.00 784.00 817.50 814.00 648.50 235.00 30.00 2.00 4220.50
1912 14.00 1.50 1.50 147.50 411.50 569.50 797.50 802.00 352.50 177.50 34.00 0.00 a 3309.00
1913 11.88 a 3.00 55.50 220.00 460.50 697.00 832.00 920.00 484.00 191.00 68.00 0.00 3942.88
1914 0.00 0.00 53.00 184.50 457.00 691.50 877.00 837.50 620.00 319.50 75.00 0.00 4115.00
1915 0.00 3.00 14.50 301.50 343.00 588.50 766.00 707.00 513.00 290.00 101.50 14.50 3642.50
1916 1.50 16.50 185.50 179.50 373.50 657.00 912.00 791.50 525.00 210.00 36.50 6.00 3894.50
1917 4.50 15.00 25.83 a 137.00 243.50 675.50 930.50 777.50 594.00 277.00 109.00 43.50 3832.83
1918 19.50 35.00 152.50 97.00 446.00 814.50 842.50 823.00 439.50 343.00 36.50 15.00 4064.00
1919 0.00 5.00 73.50 231.50 453.00 720.50 972.00 875.50 644.00 124.00 27.41 a 4.00 4130.41
1920 33.00 1.50 40.30 a 70.50 443.00 665.00 893.00 807.00 555.00 281.00 25.00 7.50 3821.80
1921 18.00 33.00 134.50 175.00 474.00 751.00 902.50 863.50 597.00 382.50 69.50 43.40 a 4443.90
1922 3.00 12.00 60.50 145.50 474.50 788.50 879.50 969.50 669.50 279.50 12.00 9.00 4303.00
1923 34.50 0.00 4.00 165.00 449.50 674.00 932.00 834.50 527.14 b 174.50 28.50 10.50 3834.14
1924 1.00 28.00 0.00 177.00 352.00 722.50 880.50 883.50 505.50 318.00 84.00 26.50 3978.50
1925 0.00 18.50 136.50 315.00 540.50 778.50 958.00 829.50 632.00 140.50 15.00 5.00 4369.00
1926 0.00 18.00 46.00 231.00 488.00 720.50 846.50 881.50 547.00 348.00 63.00 6.00 4195.50
1927 22.50 10.50 26.00 220.00 503.50 657.00 856.50 749.00 575.50 313.50 94.00 0.00 4028.00
1928 36.50 4.00 91.00 181.03 a 487.00 520.50 864.00 812.50 555.50 241.00 23.00 7.00 3823.03
1929 0.00 0.00 49.50 174.50 394.00 710.50 944.00 928.50 480.00 297.00 11.00 4.13 a 3993.13
1930 0.00 36.50 30.00 357.00 344.50 741.00 939.00 876.00 578.50 224.50 50.50 0.00 4177.50
1931 3.50 4.50 55.28 a 234.00 414.50 836.00 991.00 876.50 700.50 331.50 68.79 a 14.50 4530.58
1932 1.00 53.50 41.50 253.50 517.50 704.00 987.50 913.50 591.50 236.50 72.00 8.50 4380.50
1933 0.00 11.00 83.00 186.67 c 419.00 865.50 994.50 844.50 686.00 386.50 121.00 79.50 4677.17
1934 17.50 31.50 145.50 279.50 542.50 f 785.00 1040.05 a 934.00 483.50 407.00 126.50 1.00 4251.05
1935 18.50 33.00 103.00 189.00 278.00 699.50 989.50 915.50 577.50 282.00 11.00 0.00 4096.50
1936 24.00 20.50 55.50 314.00 594.50 832.00 1041.50 925.00 629.00 262.00 45.00 2.00 4745.00
1937 0.00 9.50 25.32 a 179.00 532.50 694.50 979.08 a 997.50 682.50 350.50 53.00 11.50 4514.90
1938 2.00 14.00 115.00 284.00 441.50 739.50 926.00 961.50 682.00 424.59 c 42.50 8.00 4640.59
1939 2.00 0.00 121.00 306.00 610.50 761.50 1044.50 890.00 716.50 323.50 49.50 88.00 4913.00
1940 0.00 38.00 154.43 d 277.50 568.00 846.50 1009.71 c 907.50 694.00 357.50 33.00 13.50 4899.64
1941 0.00 6.50 55.50 154.14 a 555.50 679.00 904.00 856.50 523.50 249.50 72.50 14.00 4070.64
1942 1.50 0.00 17.50 278.00 416.00 684.31 a 924.00 854.50 564.50 302.50 65.50 12.40 a 4120.71
1943 54.00 26.00 78.00 354.50 369.50 688.00 965.50 950.50 574.50 286.00 53.00 0.00 4399.50
1944 6.50 15.00 12.50 115.50 495.50 698.00 897.50 931.00 581.50 325.50 66.00 4.00 4148.50
1945 20.50 16.50 80.50 147.50 468.50 557.50 924.50 884.00 528.50 334.00 81.00 16.50 4059.50
1946 5.50 12.00 136.92 a 390.50 362.50 753.00 955.50 864.38 a 567.50 217.50 24.50 33.50 4323.30
1947 18.00 6.50 49.50 189.50 446.50 613.00 925.50 930.50 703.50 417.50 5.00 10.00 4315.00
1948 4.00 10.00 52.00 295.00 495.48 a 738.00 934.50 889.50 726.50 285.00 37.00 10.00 4476.98
1949 0.00 10.50 42.00 296.50 490.50 708.50 939.00 901.50 595.00 230.00 188.00 7.50 4409.00
1950 17.50 29.50 76.50 234.50 357.00 736.00 829.50 785.50 561.00 414.00 84.50 22.00 4147.50
1951 22.50 43.50 23.00 145.00 471.50 560.00 947.50 837.00 547.00 216.50 27.00 7.00 3847.50
1952 2.50 3.50 9.00 222.50 485.00 865.00 923.50 891.50 659.00 280.00 27.50 0.00 4369.00
1953 57.50 23.50 93.00 171.50 398.00 825.50 973.00 876.50 664.00 353.00 99.00 4.50 4539.00
1954 16.00 86.00 45.50 381.00 514.00 816.00 1075.00 918.00 679.50 337.00 116.50 18.50 5003.00
1955 0.00 0.00 63.00 276.50 550.00 662.50 1023.50 966.00 631.00 350.00 41.00 37.50 4601.00
1956 9.50 0.00 114.00 164.50 566.50 894.00 932.00 830.00 679.50 363.50 59.50 14.00 4627.00
1957 0.00 41.00 33.00 127.00 387.00 743.00 980.50 922.50 550.00 330.00 24.00 30.00 4168.00
1958 0.00 36.50 10.50 149.50 625.50 806.00 866.00 979.50 671.50 374.00 76.50 17.50 4613.00
1959 5.50 0.00 34.00 238.00 455.50 835.50 961.00 969.00 550.50 216.00 56.00 9.50 4330.50
1960 1.00 1.50 121.00 292.00 478.00 809.00 958.00 921.50 674.00 317.50 47.00 0.52 a 4621.02
1961 2.50 38.50 53.00 206.50 494.00 756.50 919.00 928.50 441.00 271.50 22.50 0.00 z 4133.50
1962 0.00 45.00 41.85 a 292.00 549.00 691.50 886.50 871.50 591.50 384.00 104.50 11.00 4468.35
1963 1.50 54.00 100.50 247.50 575.50 803.00 1035.50 898.00 720.00 454.50 68.50 4.00 4962.50
1964 11.00 0.00 22.00 214.50 555.50 711.50 1050.00 838.00 589.50 328.50 71.00 45.00 4436.50
1965 13.50 15.00 14.00 270.50 479.50 698.00 951.50 844.50 399.50 407.00 109.50 37.50 4240.00
1966 11.00 1.00 145.50 202.50 590.00 742.50 1078.50 860.00 648.50 290.00 60.50 6.00 4636.00
1967 18.00 30.50 180.00 275.00 402.00 613.00 931.50 860.50 606.00 380.50 89.00 5.00 4391.00
1968 11.50 24.00 113.00 139.00 403.00 813.50 948.50 834.00 565.00 330.50 34.50 8.50 4225.00
1969 14.00 7.00 48.00 350.50 552.50 606.50 1006.00 979.50 665.00 113.50 44.00 18.00 4404.50
1970 24.00 25.50 27.50 135.00 110.00 z 739.50 966.50 977.50 548.00 193.00 68.00 11.00 3715.50
1971 50.50 19.50 81.50 230.00 445.00 832.00 900.00 942.50 490.00 301.50 47.50 17.00 4357.00
1972 9.50 68.50 228.50 258.50 512.00 828.50 881.00 881.00 602.00 329.00 14.00 13.00 4625.50
1973 18.50 3.00 20.50 0.00 z 492.50 803.00 895.00 967.00 558.00 367.00 41.00 4.50 4170.00
1974 20.00 14.50 149.00 234.50 632.50 794.00 1003.00 820.50 542.50 362.50 44.50 1.50 4619.00
1975 15.00 22.00 79.50 187.50 412.50 705.50 980.50 904.50 578.50 378.50 103.50 38.00 4405.50
1976 13.00 51.00 75.50 263.00 501.00 746.00 1007.50 879.00 613.50 225.50 83.00 6.00 4464.00
1977 0.00 36.50 78.50 327.50 609.00 937.00 1018.50 872.50 736.00 365.50 74.00 49.50 5104.50
1978 0.50 4.50 176.50 294.50 446.00 791.50 1004.50 869.50 694.50 324.00 82.50 0.00 4688.50
1979 0.00 15.50 78.00 286.55 a 443.50 745.00 988.00 840.00 713.00 408.50 8.50 19.00 4545.55
1980 9.50 11.00 31.00 232.00 445.00 875.50 1040.00 907.50 676.50 302.00 131.50 101.50 4763.00
1981 2.00 53.50 65.50 431.00 455.00 859.50 994.00 885.50 737.50 290.00 146.50 38.50 4958.50
1982 18.50 74.00 101.50 237.50 470.50 653.50 960.00 984.50 585.50 262.00 18.00 6.50 4372.00
1983 11.00 31.50 79.50 158.00 388.50 673.50 986.50 1047.00 678.00 350.50 86.50 0.50 4491.00
1984 4.50 8.00 25.50 125.00 588.50 728.50 1006.00 955.50 596.50 219.00 75.00 26.00 4358.00
1985 2.50 3.50 102.50 360.50 608.00 781.50 970.00 916.00 557.00 277.00 48.50 0.00 4627.00
1986 31.50 99.50 219.00 283.50 505.00 850.00 963.00 908.00 564.00 282.00 56.50 0.00 4762.00
1987 32.00 32.00 53.00 340.00 567.50 813.00 983.00 873.50 608.50 320.00 94.00 34.00 4750.50
1988 4.00 15.50 105.00 289.00 571.50 906.00 980.50 955.50 602.50 411.00 99.50 2.00 4942.00
1989 11.00 10.50 169.50 343.50 567.00 719.00 1017.50 880.00 609.00 338.00 119.50 27.00 4811.50
1990 36.50 26.50 48.00 258.00 468.50 883.00 901.50 899.00 743.50 314.50 142.00 16.00 4737.00
1991 5.00 32.00 118.50 246.50 574.00 784.50 946.50 918.50 625.50 382.00 46.00 11.50 4690.50
1992 3.50 64.00 122.50 387.50 585.50 724.50 864.00 800.50 682.00 395.00 25.50 0.00 4654.50
1993 0.00 0.50 135.00 227.00 561.00 722.00 919.50 846.50 544.00 279.00 22.50 5.50 4262.50
1994 14.00 11.50 159.00 290.50 648.50 895.50 945.50 938.50 696.50 307.00 64.50 10.50 4981.50
1995 20.50 88.50 163.50 162.50 336.00 684.50 939.50 1027.50 610.00 294.50 151.00 35.50 4513.50
1996 24.00 78.50 62.50 290.00 552.50 810.00 978.50 899.00 593.50 346.00 64.50 25.50 4724.50
1997 31.00 19.00 181.50 201.00 549.50 811.50 972.00 897.00 695.00 364.00 51.50 8.50 4781.50
1998 24.50 11.00 122.00 235.00 609.50 686.00 1023.50 963.00 793.00 308.50 128.00 28.50 4932.50
1999 24.50 65.00 166.00 195.50 498.00 740.50 1031.50 940.00 551.50 318.50 191.50 29.50 4752.00
2000 11.00 69.00 125.50 362.00 665.00 790.00 1069.50 1007.00 676.00 321.00 9.50 1.50 5107.00
2001 15.00 2.00 82.00 327.50 542.50 852.00 1071.00 986.00 721.50 319.00 141.50 10.50 5070.50
2002 19.00 41.00 74.50 368.50 506.00 939.50 1120.50 942.00 681.00 223.00 73.00 14.00 5002.00
2003 48.00 26.00 150.50 327.50 569.50 703.00 1139.50 1014.50 593.00 489.00 52.50 12.00 5125.00
2004 6.50 24.00 247.50 308.00 633.50 714.00 943.50 836.50 652.50 340.50 77.00 30.00 4813.50
2005 39.00 34.00 122.00 280.00 544.00 786.00 1094.00 932.00 716.50 357.50 135.00 30.00 5070.00
2006 53.50 34.50 0.00 z 404.00 639.00 951.72 a 619.50 m 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2082.72
Period of Record Statistics
MEAN 12.97 22.98 85.37 239.48 484.37 743.76 946.53 890.82 606.04 306.68 65.70 15.04 4419.47
S.D. 13.97 22.72 57.14 75.91 86.90 88.26 75.60 61.56 78.74 69.64 38.93 17.84 377.11
SKEW 1.28 1.32 0.67 0.26 -0.19 -0.01 -0.10 -0.03 -0.32 -0.32 0.88 2.40 -0.17
MAX 57.50 99.50 247.50 431.00 665.00 951.72 1139.50 1047.00 793.00 489.00 191.50 101.50 5125.00
MIN 0.00 0.00 0.00 70.50 243.50 520.50 766.00 707.00 352.50 113.50 5.00 0.00 3309.00
NO YRS 107 107 106 106 105 107 106 106 105 106 106 105 101