LITTLEFIELD, TEXAS

Monthly Total Heating Degree Days

(415265)

Base Temperature = 65 F

File last updated on Oct 29, 2012
*** Note *** Provisional Data *** After Year/Month 201210
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
1966 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 b 25.83 a 15.00 b 234.05 a 376.50 815.00 1466.38
1967 752.00 650.42 d 315.00 82.50 87.66 b 3.62 a 0.00 0.00 33.00 e 200.97 b 483.50 853.00 3461.66
1968 773.50 698.00 479.35 d 288.50 82.00 3.50 0.00 3.00 16.00 160.00 538.50 762.60 a 3804.95
1969 650.50 643.50 747.00 160.00 57.87 a 18.00 0.00 0.00 3.00 349.50 498.50 667.50 3795.37
1970 871.00 585.50 632.50 231.50 49.00 16.00 0.00 0.00 53.50 317.00 518.79 a 614.50 3889.29
1971 776.50 703.11 a 505.50 236.00 53.00 0.00 1.50 0.00 111.00 165.50 443.50 722.50 3718.11
1972 776.00 611.00 322.50 141.00 65.00 1.00 0.00 z 0.50 25.00 222.00 719.00 870.50 3753.50
1973 961.00 719.50 511.00 387.00 109.50 0.00 0.00 0.00 46.00 122.00 398.50 726.50 3981.00
1974 814.50 610.50 290.50 181.50 33.50 5.50 0.00 0.00 a 145.00 205.50 513.00 789.00 3588.50
1975 807.00 739.41 a 584.50 284.50 44.00 3.00 0.00 0.00 106.00 147.77 a 479.00 720.00 3915.17
1976 824.00 442.00 460.00 140.50 95.50 0.00 0.00 0.00 39.83 a 378.50 688.50 790.00 3858.83
1977 1009.50 579.50 511.50 214.00 9.50 0.00 0.00 0.00 0.50 132.00 434.50 691.00 3582.00
1978 1034.00 885.00 477.00 111.50 88.00 6.50 0.00 0.50 54.50 208.00 558.00 920.50 4343.50
1979 1138.50 748.50 576.00 246.50 106.00 21.50 0.00 0.00 20.50 151.00 655.50 795.50 4459.50
1980 820.50 698.00 572.47 a 318.00 91.00 0.00 0.00 0.00 36.00 245.93 a 578.57 b 639.50 3999.97
1981 776.00 616.50 526.48 a 182.50 53.50 4.50 0.00 0.00 23.00 234.00 414.50 686.00 3516.98
1982 839.00 758.00 497.50 292.00 76.50 9.00 0.00 0.00 7.00 256.00 575.50 872.00 4182.50
1983 1017.50 680.00 535.50 431.50 90.00 38.00 0.00 0.00 35.50 160.50 461.38 a 1083.00 4532.88
1984 898.50 658.50 580.50 319.00 49.50 0.00 0.00 0.00 98.50 275.00 525.50 726.50 4131.50
1985 938.00 740.00 423.50 161.50 42.50 9.50 0.00 0.00 55.00 235.00 517.00 914.00 4036.00
1986 0.00 z 613.00 410.00 169.00 57.50 0.00 0.00 0.00 10.50 258.50 592.00 829.00 2939.50
1987 899.00 632.00 636.00 325.50 49.00 4.50 0.00 8.00 14.50 179.50 532.50 890.00 4170.50
1988 980.50 698.00 520.00 274.50 69.50 0.00 0.00 13.00 18.00 167.50 462.00 806.00 4009.00
1989 728.00 759.50 415.00 193.50 46.50 18.50 0.00 0.50 87.00 169.50 521.50 979.50 3919.00
1990 788.50 601.00 542.50 240.00 124.00 0.00 4.00 0.00 9.50 202.00 452.00 876.50 3840.00
1991 933.00 553.00 459.00 194.50 43.50 0.50 0.00 0.00 107.00 211.00 689.50 771.00 3962.00
1992 879.50 554.00 413.50 197.00 82.00 9.00 0.00 0.00 33.50 153.50 650.69 a 831.00 3803.69
1993 885.50 703.00 522.50 0.00 z 50.00 0.00 0.00 0.00 33.50 280.50 661.50 743.00 3879.50
1994 838.00 712.50 461.50 250.00 80.50 0.00 0.00 4.00 20.50 215.50 496.00 693.37 a 3771.87
1995 779.00 540.00 509.00 295.00 65.50 0.00 0.00 0.00 56.38 a 198.50 469.00 0.00 z 2912.38
1996 828.00 595.00 585.50 238.50 5.00 0.00 0.00 0.00 42.00 221.50 518.50 733.00 3767.00
1997 913.50 737.50 440.50 400.00 87.00 3.00 0.00 3.50 24.50 239.50 592.50 903.50 4345.00
1998 678.00 621.00 558.00 309.50 9.50 10.00 0.00 0.00 0.00 117.00 418.00 762.50 3483.50
1999 712.50 499.00 520.00 271.50 91.50 3.50 0.50 0.00 42.50 209.00 340.86 a 790.00 3480.86
2000 721.50 489.50 426.50 200.00 36.00 3.50 0.00 0.00 27.50 183.50 739.29 b 951.50 3778.79
2001 905.89 d 586.00 573.50 128.50 34.50 0.00 0.00 0.00 9.50 151.00 411.00 721.50 3521.39
2002 717.00 671.50 587.50 177.50 33.00 0.00 0.00 0.00 7.50 252.00 569.00 752.00 3767.00
2003 715.00 677.50 411.50 152.50 26.00 4.00 0.00 0.00 21.50 86.00 454.00 694.00 3242.00
2004 726.00 729.00 332.00 229.50 42.00 0.50 4.00 0.00 25.00 164.00 605.00 755.00 3612.00
2005 710.50 599.00 551.00 234.50 120.50 0.00 1.00 0.50 6.50 182.00 422.00 757.50 3585.00
2006 586.50 591.50 432.50 122.00 23.50 0.00 0.00 0.00 50.00 211.50 408.00 765.50 3191.00
2007 972.50 630.00 347.50 345.00 81.50 2.00 0.00 0.00 0.00 140.50 459.50 738.50 3717.00
2008 800.00 574.50 450.50 244.50 72.50 0.00 0.00 0.00 19.50 192.00 429.00 732.50 3515.00
2009 733.50 476.50 383.50 246.50 62.50 0.00 3.00 0.00 33.00 276.00 382.00 926.50 3523.00
2010 840.00 785.50 498.00 210.50 96.00 0.00 0.00 2.50 1.00 105.50 485.00 640.50 3664.50
2011 818.00 405.50 f 317.00 111.50 69.00 0.00 0.00 0.00 17.00 151.50 474.00 896.00 2854.00
2012 663.00 657.50 297.50 71.00 57.00 0.00 0.00 0.00 30.50 115.00 h 0.00 z 0.00 z 1776.50
Period of Record Statistics
MEAN 827.33 645.63 481.52 227.59 63.01 4.32 0.30 1.32 35.57 202.58 513.31 791.08 3811.67
S.D. 114.71 89.16 99.45 82.94 28.78 7.49 0.95 4.33 33.01 60.99 96.58 99.03 308.64
SKEW 0.42 0.01 -0.02 0.34 0.04 2.61 3.23 4.48 1.52 0.67 0.59 0.64 0.38
MAX 1138.50 885.00 747.00 431.50 124.00 38.00 4.00 25.83 145.00 378.50 739.29 1083.00 4532.88
MIN 586.50 442.00 290.50 71.00 5.00 0.00 0.00 0.00 0.00 86.00 340.86 614.50 3191.00
NO YRS 45 45 46 45 46 46 46 47 47 46 46 45 40