GREAT SAND DUNES NAT, COLORADO

Monthly Total Growing Degree Days

(053541)

Base Temperature = 40 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1950 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 455.00 c 401.50 33.00 f 2.50 859.00
1951 0.00 6.50 19.00 102.00 371.00 562.50 901.50 762.00 541.50 215.00 2.00 0.00 a 3483.00
1952 0.00 0.00 3.50 117.00 357.50 724.50 780.50 730.50 494.00 267.63 a 17.00 0.00 3492.13
1953 0.00 0.00 31.00 83.50 271.00 688.50 784.00 696.50 533.50 199.50 16.00 0.00 3303.50
1954 0.00 a 7.00 12.50 225.50 390.50 676.55 a 840.62 a 725.00 558.62 a 314.50 3.00 0.00 3753.79
1955 0.00 0.00 9.00 123.00 319.50 556.50 787.00 757.50 565.00 273.00 26.00 0.50 3417.00
1956 0.00 0.00 25.00 79.00 428.00 686.50 740.50 611.00 552.00 177.00 3.00 0.00 3302.00
1957 0.00 20.50 13.95 a 90.50 227.00 596.00 745.50 684.00 466.00 195.00 7.00 0.00 3045.45
1958 0.00 6.00 2.00 87.00 436.50 694.50 790.50 791.00 548.50 248.00 30.50 3.00 3637.50
1959 0.00 0.00 5.00 147.50 370.00 696.50 765.59 c 717.00 484.00 157.00 6.50 0.00 3349.09
1960 0.00 0.00 24.50 168.50 333.00 666.50 779.50 801.00 576.00 214.50 30.50 0.00 3594.00
1961 0.00 0.00 10.00 113.00 406.50 676.00 768.50 718.00 411.00 179.50 0.00 0.00 3282.50
1962 0.00 3.00 10.50 188.50 369.00 573.00 732.50 732.00 471.50 228.50 11.00 0.00 3319.50
1963 3.50 12.00 48.00 162.00 493.50 651.00 869.50 728.50 d 558.00 319.50 9.50 0.00 3855.00
1964 0.00 0.00 6.00 90.50 385.50 587.00 814.00 668.50 487.00 251.50 19.66 a 0.00 3309.66
1965 0.00 0.00 3.50 119.00 294.50 510.00 768.00 646.00 375.00 256.50 34.50 0.00 3007.00
1966 0.00 0.00 38.00 142.00 450.00 575.00 822.00 690.50 494.00 168.50 16.00 6.50 3402.50
1967 0.50 0.00 82.00 141.00 347.00 519.64 b 715.00 571.00 438.50 229.00 21.00 0.00 3064.64
1968 0.00 0.00 19.00 40.50 278.48 a 643.00 734.50 611.50 433.33 c 234.57 a 3.00 0.00 2997.88
1969 1.50 0.00 a 10.00 147.50 419.50 465.50 757.00 793.08 a 488.50 83.00 1.50 0.00 a 3167.08
1970 0.00 1.00 1.00 48.50 401.00 554.00 801.50 769.00 419.00 110.00 13.50 4.00 3122.50
1971 18.50 1.50 70.50 121.00 296.00 635.50 762.50 712.00 431.50 183.50 14.50 1.00 3248.00
1972 0.50 7.50 94.50 180.00 341.50 613.50 761.50 730.00 491.50 256.50 0.00 0.00 3477.00
1973 0.00 0.00 0.00 40.00 304.00 599.50 715.00 677.00 425.50 202.00 49.00 0.00 3012.00
1974 0.00 0.00 54.25 a 133.50 437.00 622.50 0.00 z 629.50 452.50 282.74 b 1.55 a 0.00 2613.54
1975 0.00 0.00 7.50 106.00 305.00 561.00 751.50 710.00 456.00 280.00 36.50 0.00 3213.50
1976 0.00 0.00 5.34 b 111.72 a 333.50 589.50 812.72 a 684.50 487.78 c 166.00 27.00 0.00 3218.06
1977 0.00 0.00 2.50 182.50 389.50 720.50 787.29 b 755.00 547.50 249.50 44.00 6.00 3684.29
1978 0.00 a 1.04 a 62.50 188.79 a 284.37 e 681.72 a 847.33 a 722.00 525.00 a 282.62 a 55.00 q 0.00 z 3595.37
1979 0.00 a 0.00 c 1.60 b 166.73 d 344.32 c 598.45 a 804.50 700.00 550.50 0.00 z 0.52 a 0.00 3166.62
1980 0.00 0.50 3.00 102.00 266.50 707.00 898.50 781.50 567.50 211.50 66.50 4.28 b 3608.78
1981 0.00 a 1.50 7.50 245.50 296.50 743.04 b 803.50 690.50 512.50 180.50 37.00 0.00 a 3518.04
1982 0.00 3.50 12.00 101.00 314.50 589.50 815.00 734.50 468.50 141.00 16.00 0.00 3195.50
1983 0.00 0.00 16.00 88.50 249.00 491.00 767.00 768.00 588.00 188.00 53.50 0.00 3209.00
1984 0.00 0.00 4.50 78.00 462.50 576.50 847.50 715.50 525.50 110.00 29.50 0.00 3349.50
1985 0.00 0.00 23.00 142.00 382.00 641.00 781.50 764.00 424.50 181.00 25.50 0.00 3364.50
1986 2.50 20.74 a 83.50 150.50 325.50 a 588.00 735.50 753.00 435.00 125.50 3.00 0.00 3222.74
1987 0.00 0.00 3.50 121.00 311.50 671.50 806.00 0.00 z 0.00 z 279.00 0.00 z 0.00 2192.50
1988 0.00 0.00 z 0.00 z 0.00 z 0.00 z 637.00 804.00 745.55 a 435.50 285.50 42.50 0.00 2950.05
1989 0.00 0.00 96.00 250.00 481.00 612.93 a 872.50 708.00 547.50 227.00 20.50 0.00 3815.43
1990 0.00 5.50 58.00 154.50 326.00 741.50 748.00 697.00 600.00 213.50 20.50 0.00 3564.50
1991 0.00 0.00 20.00 110.50 378.00 625.00 763.50 714.00 470.50 284.00 3.00 0.00 3368.50
1992 0.00 0.00 2.07 a 214.50 393.00 573.50 696.00 667.00 504.50 284.00 0.00 0.00 3334.57
1993 0.00 0.00 29.50 106.00 332.50 619.50 804.50 658.75 a 428.50 171.50 0.00 0.00 3150.75
1994 0.00 0.00 37.50 134.00 379.50 747.50 810.50 776.00 485.50 152.00 26.00 0.00 3548.50
1995 0.00 11.50 48.00 85.00 204.50 542.00 696.50 807.00 473.00 202.50 28.50 4.50 3103.00
1996 0.00 6.00 23.00 134.00 537.50 671.50 840.50 772.00 440.50 218.00 25.00 0.00 3668.00
1997 0.00 0.00 76.50 84.00 336.00 620.50 772.50 719.00 573.50 219.50 11.50 0.00 3413.00
1998 0.00 0.00 42.00 62.00 408.00 614.00 771.50 599.00 638.00 210.50 22.50 1.00 3368.50
1999 0.00 0.50 75.95 a 93.00 318.00 584.00 795.67 a 709.50 469.00 259.50 68.50 0.00 3373.62
2000 4.65 a 4.50 22.00 230.17 a 484.00 659.00 848.50 823.50 562.50 176.50 0.00 0.00 3815.32
2001 0.00 0.00 14.00 200.00 431.00 689.00 817.00 713.50 569.48 a 248.00 61.50 0.00 3743.48
2002 0.00 1.50 45.00 263.50 422.50 790.50 871.00 789.00 522.50 171.00 4.00 0.00 3880.50
2003 0.00 6.50 19.00 158.50 406.00 591.50 947.00 788.00 477.50 333.50 41.00 4.00 3772.50
2004 0.00 0.00 117.50 118.50 439.00 653.00 751.50 710.50 497.50 181.50 22.50 0.00 3491.50
2005 1.00 0.00 13.00 114.00 419.00 607.50 878.50 697.50 540.00 214.50 53.50 0.00 3538.50
2006 0.00 2.50 37.00 192.00 456.00 750.00 798.00 723.50 0.00 z 167.00 21.50 2.50 3150.00
2007 0.00 0.50 69.50 116.00 347.00 642.50 786.50 803.50 554.00 237.50 39.00 0.00 3596.00
2008 0.00 0.00 26.50 112.00 337.50 663.00 804.50 726.50 494.00 227.50 40.50 0.00 3432.00
2009 0.00 1.00 59.00 112.00 438.00 523.50 828.00 757.50 472.50 142.50 55.50 0.00 3389.50
2010 0.00 0.00 12.50 147.00 361.50 731.00 842.50 767.50 615.50 269.00 32.50 2.50 3781.50
2011 0.00 0.00 57.50 137.50 302.50 719.00 920.50 841.50 503.00 210.00 1.50 0.00 3693.00
2012 0.00 0.00 128.50 250.00 432.00 814.50 836.50 789.00 550.00 238.00 28.00 0.00 4066.50
2013 0.00 0.00 29.45 a 13.00 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 29.45
Period of Record Statistics
MEAN 0.52 2.13 32.00 135.30 366.59 634.76 798.36 725.15 502.68 219.14 22.41 0.68 3430.99
S.D. 2.44 4.43 31.18 52.58 69.18 73.20 53.19 56.03 56.94 58.46 18.54 1.57 251.43
SKEW 6.62 2.79 1.20 0.62 0.05 0.11 0.50 -0.46 0.12 0.28 0.65 2.30 0.28
MAX 18.50 20.74 128.50 263.50 537.50 814.50 947.00 841.50 638.00 401.50 68.50 6.50 4066.50
MIN 0.00 0.00 0.00 40.00 204.50 465.50 696.00 571.00 375.00 83.00 0.00 0.00 2997.88
NO YRS 63 62 62 61 61 62 61 61 61 62 60 62 56