MT WILSON NO 2, CALIFORNIA

Monthly Total Heating Degree Days

(046006)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 20.00 5.00 101.50 266.50 431.50 801.00 1625.50
1949 1171.00 820.00 813.50 355.50 408.00 65.00 1.50 44.50 34.00 287.00 192.00 706.50 4898.50
1950 884.50 486.00 556.50 340.50 285.00 151.50 12.00 9.00 129.50 145.00 270.00 386.50 3656.00
1951 711.50 657.50 599.00 525.00 311.50 110.50 0.50 32.00 20.00 242.00 477.00 833.00 4519.50
1952 870.00 697.00 954.50 513.00 144.50 200.50 1.50 0.00 49.00 48.50 638.50 780.00 4897.00
1953 474.00 583.00 653.00 548.00 551.00 190.50 0.00 49.50 41.00 243.00 399.50 549.50 4282.00
1954 689.00 377.00 759.50 293.00 132.50 160.50 0.00 43.00 7.50 147.50 328.00 607.08 a 3544.58
1955 897.50 686.50 591.00 560.50 397.50 141.50 31.57 d 0.00 82.50 99.50 460.50 640.50 4589.07
1956 590.50 759.50 461.50 557.50 323.50 54.00 24.50 14.50 3.00 330.00 296.00 501.50 3916.00
1957 899.00 465.00 606.00 522.00 474.50 54.00 2.00 34.50 50.50 406.00 569.50 376.00 h 4083.00
1958 625.50 564.50 888.50 496.50 182.00 161.00 23.00 0.00 44.00 149.50 417.00 323.50 3875.00
1959 537.00 775.50 409.50 296.00 348.00 23.50 0.00 32.50 132.50 150.00 277.50 560.50 3542.50
1960 784.00 0.00 z 417.00 380.50 278.00 12.50 0.00 8.50 13.50 236.00 534.00 616.50 3280.50
1961 510.00 527.00 601.00 400.50 415.50 82.50 0.00 8.50 116.50 291.50 547.50 674.00 4174.50
1962 646.50 765.50 839.00 227.50 465.50 112.50 7.50 4.50 22.50 205.00 373.50 508.00 4177.50
1963 724.00 409.00 726.50 709.50 298.00 261.50 20.00 20.50 74.50 262.00 520.50 513.00 4539.00
1964 729.00 638.50 766.50 604.00 440.50 184.50 10.00 25.50 48.00 117.50 635.50 686.50 4886.00
1965 590.00 549.00 742.50 602.50 374.50 233.50 3.00 4.00 207.00 81.50 527.50 743.50 4658.50
1966 754.50 726.50 478.00 333.50 249.50 120.50 24.50 19.50 114.00 230.00 480.50 588.50 4119.50
1967 560.50 450.00 654.50 898.00 357.50 221.00 0.00 0.00 46.00 86.00 396.50 773.50 4443.50
1968 642.50 483.00 589.50 469.00 316.00 117.41 a 14.00 75.50 58.50 198.50 450.00 712.00 4125.91
1969 655.00 799.08 b 664.50 455.00 197.00 155.00 20.00 0.00 37.50 320.50 458.00 395.50 h 3761.58
1970 612.50 536.50 621.00 606.50 185.50 124.00 0.00 0.00 a 39.00 242.00 408.00 759.50 4134.50
1971 563.00 550.50 480.00 553.00 489.50 148.00 0.00 0.00 96.00 381.50 462.00 901.00 4624.50
1972 563.00 465.50 281.50 403.50 273.50 59.50 6.00 28.00 111.00 475.00 577.00 698.00 3941.50
1973 777.50 712.50 872.00 455.50 137.00 74.00 0.00 24.50 0.00 z 182.00 558.00 516.00 4309.00
1974 763.00 545.50 626.00 441.00 256.50 3.50 f 30.50 h 0.50 l 0.00 273.50 403.00 676.00 3984.50
1975 530.00 640.50 761.57 a 780.52 a 265.05 a 78.00 14.50 h 24.50 1.00 274.72 b 394.50 493.50 4243.86
1976 480.50 604.50 622.00 597.41 a 198.29 b 118.00 5.17 a 86.59 b 131.50 221.00 317.50 517.50 3899.96
1977 745.50 402.37 a 764.50 335.00 598.50 46.00 9.00 8.50 109.50 90.50 182.50 409.00 3700.87
1978 636.00 547.50 477.00 383.50 k 146.00 13.00 0.00 z 0.00 z 0.00 z 72.50 497.50 f 704.50 2596.50
1979 865.00 655.50 712.00 416.00 204.00 48.50 25.50 18.00 2.50 197.00 478.50 495.00 4117.50
1980 656.00 531.00 712.50 413.00 484.50 100.50 6.00 39.50 30.00 199.50 284.50 375.50 3832.50
1981 570.00 456.50 675.50 325.50 257.50 12.00 0.00 0.00 16.50 352.00 389.00 424.50 3479.00
1982 741.00 487.00 764.50 469.00 248.00 0.00 z 32.50 0.00 177.50 209.50 588.50 694.50 4412.00
1983 583.00 597.50 716.00 692.00 258.50 59.50 5.00 46.50 82.50 207.50 508.00 610.00 4366.00
1984 510.00 504.50 430.00 462.00 76.00 65.50 7.00 0.00 33.00 290.00 461.50 740.50 3580.00
1985 603.50 446.00 638.00 234.50 289.00 63.50 0.00 1.50 209.00 173.50 465.50 457.50 3581.50
1986 384.00 548.50 427.50 449.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1809.00
1987 0.00 z 0.00 z 0.00 z 0.00 z 102.00 f 20.50 53.50 18.00 26.00 182.50 501.00 833.50 1635.00
1988 606.50 444.50 416.50 424.50 211.26 d 98.50 0.00 2.50 61.00 62.00 464.00 744.00 3535.26
1989 716.50 639.00 398.50 199.50 249.50 54.00 0.00 6.50 56.00 248.50 246.50 395.00 3209.50
1990 615.50 652.00 479.00 367.50 311.50 71.50 0.00 30.00 61.00 69.50 375.00 658.00 3690.50
1991 609.00 337.00 838.50 471.00 351.50 107.07 a 5.50 h 6.00 20.00 207.50 326.00 633.50 3907.07
1992 548.00 591.00 722.00 205.50 84.50 93.50 28.50 6.50 0.50 109.50 j 428.00 779.50 3487.50
1993 738.50 745.00 401.00 267.50 186.00 118.50 3.50 14.50 21.00 181.00 422.00 560.50 3659.00
1994 454.00 689.50 472.50 377.00 219.50 h 17.00 0.00 0.00 29.50 257.00 677.50 664.50 3638.50
1995 777.50 374.00 603.50 467.50 436.50 95.50 1.50 0.00 12.00 68.00 164.50 527.53 b 3528.03
1996 519.50 547.50 474.30 a 282.93 a 156.00 49.00 0.00 0.50 37.00 278.50 366.21 a 531.50 3242.94
1997 713.52 a 539.50 244.00 369.50 14.00 81.00 1.00 0.00 13.50 202.50 413.00 696.00 3287.52
1998 589.50 757.50 582.50 565.34 a 560.58 a 204.50 0.00 0.50 145.00 219.00 417.00 583.00 4624.43
1999 499.00 505.00 619.50 605.69 a 238.59 c 121.50 0.00 20.00 25.50 39.02 b 225.00 a 492.90 a 3391.70
2000 540.95 a 638.54 b 559.00 251.00 120.50 0.00 z 18.50 14.50 46.50 304.66 b 549.83 a 417.50 3461.47
2001 798.00 768.00 459.00 533.79 a 35.02 d 13.00 4.50 0.00 0.00 53.50 404.00 703.00 3771.81
2002 592.00 399.50 584.50 399.50 231.00 16.00 0.00 0.50 68.00 200.50 268.00 694.00 3453.50
2003 253.50 579.00 468.50 625.00 266.50 f 0.00 z 0.00 0.00 0.00 11.00 519.50 0.00 z 2456.50
2004 562.00 672.50 157.00 r 353.50 193.50 24.50 4.00 0.50 52.00 303.00 552.00 315.50 r 2717.50
2005 122.00 z 627.50 572.00 436.00 216.50 98.00 0.00 0.00 m 64.50 237.00 248.00 474.00 2973.50
2006 569.00 458.00 806.50 540.00 159.00 21.50 0.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2554.00
Period of Record Statistics
MEAN 646.99 578.85 608.11 454.70 279.13 96.76 8.05 15.35 58.38 205.52 423.67 610.67 3987.41
S.D. 148.75 122.27 156.49 144.47 134.37 63.08 11.63 19.54 51.94 98.60 120.21 136.38 491.85
SKEW 0.62 0.10 -0.03 0.52 0.40 0.63 1.74 1.67 1.17 0.15 -0.21 -0.10 0.31
MAX 1171.00 820.00 954.50 898.00 598.50 261.50 53.50 86.59 209.00 475.00 677.50 901.00 4898.50
MIN 253.50 337.00 244.00 199.50 14.00 12.00 0.00 0.00 0.00 11.00 164.50 323.50 3209.50
NO YRS 56 56 56 56 54 53 53 54 55 56 56 53 40