CHISOS BASIN, TEXAS

Monthly Total Heating Degree Days

(411715)

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
1943 0.00 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 0.00 z 0.00 z 0.00 z 0.00
1944 0.00 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 0.00 z 0.00 z 0.00 z 0.00
1945 0.00 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 0.00 z 0.00 z 0.00 z 0.00
1946 0.00 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 0.00 z 0.00 z 0.00 z 0.00
1947 0.00 z 456.00 284.50 115.50 4.50 0.00 0.00 m 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 860.50
1948 628.50 267.21 a 228.22 b 33.50 1.50 0.00 0.00 0.00 38.50 139.50 b 448.80 e 286.00 2071.74
1949 604.50 299.48 e 149.50 202.00 3.50 0.00 0.00 4.00 11.00 155.53 b 283.00 477.00 2189.51
1950 267.00 284.50 181.50 51.50 2.50 0.00 0.00 0.00 1.00 24.50 271.55 a 418.50 a 1502.55
1951 466.50 367.00 240.00 123.00 11.00 3.00 0.00 0.00 16.00 51.00 276.00 g 438.00 1715.50
1952 308.40 b 395.50 352.50 121.67 c 45.00 0.00 0.00 0.00 a 6.00 126.50 393.50 554.50 2303.56
1953 264.00 o 364.00 c 111.17 b 62.50 49.00 0.00 0.00 0.00 a 6.50 84.00 f 296.50 f 710.50 1303.67
1954 364.50 267.50 254.50 31.55 a 12.40 a 0.00 0.00 0.00 0.00 73.88 a 190.50 k 453.50 1457.84
1955 585.00 340.00 g 165.33 a 69.00 4.00 7.50 0.00 0.50 0.00 62.50 298.50 389.50 1581.83
1956 457.50 394.50 198.00 103.50 0.00 0.00 0.00 0.00 7.76 a 55.50 383.00 495.50 2095.26
1957 300.50 161.50 258.50 78.00 53.50 8.50 0.00 0.00 p 46.20 e 145.00 g 408.50 362.50 1677.70
1958 614.50 357.00 389.50 103.50 20.31 b 0.00 0.00 0.00 8.50 214.33 b 316.00 539.00 2562.64
1959 448.47 a 343.00 333.00 161.00 1.50 0.00 1.00 0.00 d 7.20 e 86.36 c 429.50 529.77 c 2340.79
1960 531.13 a 544.50 206.31 b 66.00 23.00 0.00 0.00 0.00 4.50 45.50 226.50 590.00 2237.44
1961 642.50 400.00 183.50 91.50 1.07 b 8.50 0.00 0.00 7.50 63.07 b 367.00 395.50 2160.14
1962 610.18 a 180.00 324.50 69.31 a 4.65 a 1.03 a 0.00 0.00 a 12.50 48.05 a 257.50 504.55 b 2012.28
1963 538.88 a 416.00 189.50 50.00 5.50 0.00 0.00 b 0.00 21.50 51.00 268.97 a 544.00 2085.35
1964 589.00 a 508.00 228.37 a 37.24 a 1.00 4.00 0.00 0.00 17.50 123.00 254.50 440.00 2202.61
1965 399.50 477.50 344.50 41.00 4.13 a 3.00 0.00 0.00 16.00 126.50 159.50 424.50 1996.13
1966 630.00 524.50 249.00 68.28 a 54.50 0.00 0.00 5.00 8.00 136.83 b 241.50 565.50 2483.10
1967 552.00 427.00 157.50 19.00 22.50 0.00 0.00 10.00 50.00 143.00 306.00 562.50 2249.50
1968 586.50 463.00 446.00 148.50 14.00 0.00 0.00 1.50 53.00 57.50 382.50 511.50 a 2664.00
1969 439.00 401.50 500.50 41.00 18.00 0.50 0.00 0.00 0.00 110.50 423.50 460.50 2395.00
1970 600.50 490.00 385.50 106.50 61.50 14.00 0.00 0.00 95.50 225.50 357.50 284.50 2621.00
1971 461.50 398.50 253.00 146.00 29.50 1.00 1.00 8.00 45.00 136.50 266.50 452.00 2198.50
1972 514.50 376.50 121.00 25.00 14.00 1.00 0.00 0.50 10.00 70.00 415.50 509.00 2057.00
1973 676.83 d 537.70 a 321.50 223.50 31.00 3.00 0.00 0.00 28.00 78.50 154.50 533.50 2588.04
1974 454.48 c 440.00 116.50 101.50 9.50 0.00 0.00 1.00 73.50 138.00 361.00 540.36 b 2235.84
1975 580.50 443.50 262.00 141.00 1.00 0.00 2.50 0.00 54.00 88.50 304.66 a 501.00 2378.66
1976 631.50 284.50 220.00 97.50 81.00 0.00 0.00 0.00 31.00 310.50 559.50 681.48 a 2896.98
1977 597.50 470.50 329.12 a 114.00 0.00 0.00 0.00 0.00 0.00 84.73 a 254.00 353.50 2203.35
1978 566.50 513.50 272.50 54.50 14.50 0.00 0.00 6.00 76.50 160.00 274.00 522.50 2460.50
1979 634.00 403.00 273.00 96.50 49.50 16.00 0.00 0.50 45.00 56.50 440.00 516.00 2530.00
1980 413.00 431.50 312.00 175.50 19.38 c 0.00 0.00 1.00 2.50 220.00 491.00 473.50 2539.38
1981 625.50 411.00 406.50 135.50 27.00 10.50 0.00 0.00 22.00 156.60 b 247.76 a 430.00 2472.36
1982 490.00 461.50 199.50 105.00 40.50 0.00 0.00 0.00 2.50 117.50 372.00 615.00 2403.50
1983 612.00 491.00 344.50 263.00 17.00 4.50 0.00 0.00 15.00 102.50 333.50 472.75 c 2655.75
1984 655.00 529.50 0.00 z 112.50 12.50 0.00 3.00 0.00 41.50 108.50 334.00 317.50 2114.00
1985 763.50 479.00 248.50 98.50 9.00 0.00 z 0.00 0.00 20.00 146.50 201.00 501.00 2467.00
1986 537.50 316.00 282.50 15.50 22.00 0.00 2.50 0.00 8.50 192.50 368.50 653.50 2399.00
1987 593.50 463.50 459.50 287.07 a 54.00 31.00 0.00 4.50 18.62 a 69.00 338.00 484.08 e 2802.77
1988 616.50 456.50 321.00 98.50 20.50 2.50 2.50 0.00 18.50 70.50 249.83 a 547.00 2403.83
1989 494.34 c 400.40 c 240.50 90.52 a 3.50 0.00 0.00 1.50 43.00 57.19 b 284.50 683.07 b 2298.52
1990 527.52 a 403.00 272.28 a 86.38 a 42.76 b 0.00 0.55 c 0.52 a 28.50 184.93 b 277.00 468.00 2291.44
1991 590.00 430.00 267.50 83.50 4.00 0.50 0.50 0.00 84.00 91.00 442.76 a 549.00 2542.76
1992 748.00 520.00 305.50 164.50 57.00 1.00 0.00 0.00 23.50 51.50 485.50 421.50 2778.00
1993 487.50 400.50 316.00 123.50 21.00 0.50 0.00 0.00 22.00 175.00 390.52 a 490.00 2426.52
1994 522.50 382.00 298.50 84.00 10.00 1.50 0.00 0.00 12.00 94.00 i 209.00 424.00 1943.50
1995 573.50 307.00 332.00 141.50 7.00 4.00 0.00 0.00 i 31.50 62.50 278.50 163.50 o 1737.50
1996 507.50 282.00 417.50 178.50 5.00 0.00 0.00 5.00 12.00 110.00 268.00 511.50 2297.00
1997 657.00 473.00 293.50 280.00 43.50 0.00 0.00 0.00 6.21 a 169.00 349.00 676.00 2947.21
1998 462.50 476.50 355.50 171.50 0.00 0.00 0.00 1.50 0.50 104.00 243.50 498.00 2313.50
1999 475.50 264.00 217.00 82.50 0.50 11.00 1.50 0.00 24.50 114.18 a 279.50 609.00 2079.18
2000 407.50 274.00 209.50 80.50 7.50 0.00 0.00 0.00 21.50 193.50 472.00 630.00 2296.00
2001 666.00 338.50 362.18 a 65.69 a 6.50 0.00 0.00 0.00 b 16.50 75.50 300.54 b 556.93 b 2388.34
2002 504.50 608.50 318.50 40.00 7.00 0.00 0.00 0.00 8.00 118.00 420.00 583.50 2608.00
2003 490.00 440.50 338.50 77.00 14.50 0.00 1.50 0.00 z 0.00 z 139.00 252.00 532.00 2285.00
2004 545.50 541.50 272.00 166.50 36.00 3.50 2.00 6.50 40.50 70.00 422.50 641.00 2747.50
2005 422.00 501.00 372.50 93.50 g 38.00 0.00 0.00 0.00 0.00 130.00 283.00 481.00 2227.50
2006 445.50 389.50 185.00 22.50 3.00 1.50 0.00 0.00 z 19.00 0.00 z 242.50 0.00 z 1308.50
2007 700.60 a 424.00 244.50 151.00 31.00 0.00 z 0.00 0.00 2.00 105.00 342.00 473.00 2473.10
2008 540.00 365.00 314.50 80.50 40.50 0.00 0.00 6.00 77.50 119.00 361.50 473.78 a 2378.28
2009 478.43 a 0.00 z 255.50 118.00 20.00 0.00 0.00 0.00 49.00 166.50 351.00 609.00 2047.43
2010 687.00 583.00 438.50 132.50 38.50 0.00 1.00 1.00 10.50 49.50 287.00 432.50 2661.00
2011 573.50 482.00 112.00 15.00 29.50 0.00 0.00 0.00 0.00 81.63 a 282.50 598.00 2174.13
2012 496.50 420.50 211.83 a 37.00 32.11 c 0.00 0.00 0.00 12.41 a 33.00 h 0.00 z 0.00 z 1210.35
Period of Record Statistics
MEAN 540.49 412.54 277.77 103.96 20.74 2.23 0.30 1.06 23.30 113.23 327.33 506.16 2372.51
S.D. 103.01 92.73 87.46 61.23 19.04 5.09 0.73 2.26 22.91 55.38 84.92 93.31 264.03
SKEW -0.37 -0.46 0.21 0.99 0.95 3.58 2.43 2.31 1.32 0.98 0.38 -0.08 -0.30
MAX 763.50 608.50 500.50 287.07 81.00 31.00 3.00 10.00 95.50 310.50 559.50 710.50 2947.21
MIN 267.00 161.50 111.17 15.00 0.00 0.00 0.00 0.00 0.00 24.50 154.50 284.50 1502.55
NO YRS 64 64 65 65 66 64 65 61 64 60 61 62 50