AMARILLO INTL AP, TEXAS

Monthly Total Heating Degree Days

(410211)

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
1948 1052.00 852.81 b 767.00 145.00 92.50 0.00 0.00 0.00 36.50 221.00 676.00 759.00 4601.81
1949 1188.00 723.00 567.00 340.00 70.50 2.00 0.00 0.50 32.00 259.00 365.00 813.00 4360.00
1950 796.00 534.50 563.50 296.00 79.00 13.50 0.00 7.50 25.00 65.50 572.00 780.50 3733.00
1951 936.00 673.00 626.50 356.50 100.00 30.50 0.00 0.00 54.50 236.50 662.50 825.00 4501.00
1952 730.50 651.00 622.50 323.00 103.50 0.00 0.00 0.00 26.00 233.50 676.00 867.50 4233.50
1953 630.00 692.00 375.00 325.50 173.50 0.00 0.50 0.00 12.50 185.50 513.00 887.00 3794.50
1954 782.50 460.00 601.50 150.50 176.50 5.50 0.00 0.00 0.00 208.50 435.00 705.00 3525.00
1955 847.50 767.50 538.00 208.50 69.00 28.00 0.00 0.00 34.00 185.50 648.50 739.50 4066.00
1956 854.00 860.00 547.00 345.00 25.50 0.00 0.00 10.00 8.50 132.50 641.00 711.50 4135.00
1957 879.50 521.50 622.50 387.00 145.00 26.50 0.00 0.00 47.00 308.50 729.50 693.00 4360.00
1958 875.50 766.00 867.50 418.50 69.00 6.50 0.00 0.00 39.00 239.00 551.50 860.00 4692.50
1959 1014.50 723.00 593.50 326.00 78.00 3.50 0.00 0.00 47.00 318.00 679.00 766.50 4549.00
1960 1041.00 973.50 704.00 219.00 85.50 0.00 4.00 0.50 30.50 216.00 539.50 934.00 4747.50
1961 943.00 720.50 513.50 309.00 56.50 7.50 0.00 0.00 65.00 192.50 711.00 883.00 4401.50
1962 1033.00 547.00 570.50 261.00 24.50 15.50 0.00 0.00 26.00 164.00 518.00 747.50 3907.00
1963 1121.50 655.00 456.50 144.00 62.00 7.50 0.00 0.00 11.50 44.00 465.50 1006.50 3974.00
1964 862.00 955.50 628.00 241.00 55.00 7.50 0.00 0.00 50.00 155.00 526.50 804.50 4285.00
1965 745.00 768.00 827.00 198.50 58.00 7.00 0.00 0.00 76.00 197.50 381.50 685.50 3944.00
1966 1152.50 864.50 467.00 319.50 101.50 1.50 0.00 24.00 25.00 255.00 402.50 915.50 4528.50
1967 753.50 683.50 366.00 164.50 139.50 9.00 0.00 1.50 25.50 191.00 551.50 917.50 3803.00
1968 829.50 784.50 510.50 296.50 114.50 0.00 0.00 0.00 7.00 163.50 590.00 871.50 4167.50
1969 732.00 689.50 814.50 181.50 72.50 24.50 0.00 0.00 1.50 379.00 550.00 826.00 4271.00
1970 987.50 609.50 723.50 285.50 52.00 34.50 0.00 0.00 51.00 365.50 552.00 669.00 4330.00
1971 844.50 733.50 529.50 297.00 93.00 0.00 2.00 0.00 121.50 252.50 583.50 850.50 4307.50
1972 907.50 700.50 416.00 208.50 110.00 0.00 13.00 2.50 50.00 278.50 842.50 995.00 4524.00
1973 981.50 715.00 556.50 443.50 117.50 0.50 0.00 0.00 60.00 158.50 427.50 819.50 4280.00
1974 931.00 639.00 374.00 195.00 19.50 0.50 0.00 0.50 124.00 204.00 580.00 897.50 3965.00
1975 864.50 832.50 621.00 327.50 71.00 17.00 0.00 0.00 107.00 165.00 577.50 763.50 4346.50
1976 872.50 499.50 575.50 259.00 178.00 1.00 0.00 0.00 61.00 473.00 796.50 853.00 4569.00
1977 1083.00 595.00 506.00 225.00 24.50 0.00 0.00 0.00 1.50 156.50 529.50 778.50 3899.50
1978 1116.00 979.00 557.00 140.50 144.00 7.00 0.00 0.00 34.00 201.50 581.50 1000.50 4761.00
1979 1244.50 700.50 571.00 324.50 148.50 33.50 0.00 2.50 30.00 189.50 736.00 812.50 4793.00
1980 934.00 793.50 656.50 381.00 150.00 0.50 0.00 0.00 36.50 285.50 670.50 732.00 4640.00
1981 840.00 637.50 503.50 115.00 67.50 0.00 0.00 0.00 26.50 277.00 476.00 772.50 3715.50
1982 858.50 811.00 542.50 345.00 101.00 2.50 0.00 0.00 25.00 259.00 582.50 897.00 4424.00
1983 980.50 808.00 612.00 426.50 174.00 34.00 0.00 0.00 41.50 181.50 515.00 1249.00 5022.00
1984 1036.00 717.50 651.00 397.50 58.50 0.00 0.00 0.00 126.50 267.00 541.00 760.50 4555.50
1985 1039.00 778.00 481.50 174.00 41.00 5.00 0.00 0.00 112.50 257.00 645.00 963.50 4496.50
1986 697.50 689.00 386.00 209.00 76.00 0.50 0.00 2.00 28.00 298.50 670.00 865.50 3922.00
1987 960.00 644.00 632.50 324.50 74.00 10.00 0.00 8.50 20.00 231.50 590.00 942.50 4437.50
1988 1018.50 773.00 641.00 330.50 108.50 4.00 0.00 8.00 33.50 201.50 523.50 821.50 4463.50
1989 755.00 917.00 436.00 225.00 63.50 29.50 0.00 0.00 96.00 191.00 515.00 1043.00 4271.00
1990 799.50 680.00 559.50 283.50 143.00 0.00 0.00 0.00 11.50 243.00 460.00 988.00 4168.00
1991 1005.00 535.00 474.50 214.50 54.00 1.50 0.00 0.00 75.00 261.00 715.00 806.00 4141.50
1992 838.00 580.00 447.00 208.00 101.50 11.00 0.00 0.00 24.00 177.00 768.50 0.00 z 3155.00
1993 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 6.00 0.00 2.50 41.50 336.50 723.50 816.50 1926.50
1994 883.00 767.50 504.50 316.00 81.50 0.00 0.00 0.00 32.50 235.00 558.50 724.50 4103.00
1995 800.00 589.50 552.50 339.50 151.00 13.50 0.00 1.50 92.50 220.50 503.00 822.50 4086.00
1996 932.50 639.50 644.50 256.00 22.50 0.00 3.00 0.00 72.50 253.50 581.00 784.50 4189.50
1997 923.00 734.50 455.50 484.50 100.50 2.00 0.00 4.50 36.50 265.50 667.50 976.50 4650.50
1998 781.00 673.50 669.00 353.00 42.00 22.00 0.00 0.00 13.00 184.50 475.00 836.00 4049.00
1999 773.50 492.07 a 580.50 312.00 137.00 10.00 0.00 0.00 96.00 223.72 a 380.00 846.30 a 3851.09
2000 782.75 a 520.50 490.50 230.50 62.50 9.50 0.00 0.00 52.00 210.28 a 762.50 989.50 4110.53
2001 932.58 a 665.50 620.00 144.50 79.00 0.00 0.00 0.00 14.00 186.50 428.00 763.00 3833.08
2002 790.00 709.00 604.50 209.00 82.00 1.50 0.00 0.00 23.50 384.50 629.50 913.50 4347.00
2003 789.00 768.50 528.50 210.00 54.50 14.50 0.00 6.50 35.00 152.50 531.00 743.50 3833.50
2004 797.50 796.00 402.50 299.50 55.00 0.50 4.00 0.50 21.50 198.00 658.50 778.00 4011.50
2005 785.50 611.00 602.00 305.00 130.00 0.00 0.00 2.50 8.00 267.50 503.00 885.00 4099.50
2006 690.50 720.00 521.50 181.50 63.50 0.00 0.00 0.50 67.00 259.50 487.50 836.00 3827.50
2007 1040.00 716.00 366.00 364.50 70.00 5.00 0.00 0.00 2.50 169.00 503.00 842.00 4078.00
2008 842.50 686.72 d 522.00 274.50 84.50 0.00 0.00 0.50 24.00 0.00 z 505.50 798.00 3738.22
2009 820.50 542.50 429.00 292.00 115.50 0.50 0.00 0.00 55.00 379.00 440.50 1005.00 4079.50
2010 896.00 901.50 547.00 244.50 111.00 0.00 0.00 1.00 4.00 130.00 555.50 742.50 4133.00
2011 911.50 806.00 441.00 172.00 95.50 0.00 0.00 0.00 20.00 212.50 505.00 939.50 4103.00
2012 708.00 719.00 297.50 120.50 61.00 0.00 0.00 0.00 31.50 137.50 j 0.00 z 0.00 z 1937.50
Period of Record Statistics
MEAN 894.88 707.69 552.83 271.95 89.38 7.28 0.41 1.35 41.83 228.48 572.84 846.38 4229.48
S.D. 130.50 118.16 113.89 85.50 40.47 10.05 1.78 3.64 31.81 73.90 107.70 104.68 313.17
SKEW 0.48 0.14 0.37 0.15 0.47 1.49 5.85 4.31 1.10 0.63 0.31 0.99 0.16
MAX 1244.50 979.00 867.50 484.50 178.00 34.50 13.00 24.00 126.50 473.00 842.50 1249.00 5022.00
MIN 630.00 460.00 297.50 115.00 19.50 0.00 0.00 0.00 0.00 44.00 365.00 669.00 3525.00
NO YRS 64 64 64 64 64 65 65 65 65 63 64 63 61