IDYLLWILD FIRE DEPT, CALIFORNIA

Monthly Total Heating Degree Days

(044211)

Base Temperature = 65 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
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 170.00 m 271.50 o 0.00 z 0.00
1944 0.00 z 0.00 z 0.00 z 0.00 z 74.50 y 0.00 z 56.00 v 31.00 a 107.50 344.10 a 0.00 z 0.00 z 482.60
1945 0.00 z 0.00 z 0.00 z 0.00 z 426.25 c 192.50 0.50 12.00 138.62 a 308.40 b 596.25 b 0.00 z 1674.52
1946 0.00 z 552.00 h 763.50 463.00 447.50 140.69 a 27.00 28.00 69.50 537.50 750.00 604.50 3831.19
1947 812.00 636.50 645.66 b 422.00 269.70 a 163.00 9.50 52.00 49.50 324.47 a 727.78 c 562.50 h 4112.10
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 21.70 a 17.00 121.07 b 284.34 b 435.50 f 832.00 1276.12
1949 1171.91 c 636.50 i 818.92 a 338.50 h 458.44 e 122.40 e 24.50 75.00 40.34 a 386.00 367.20 e 522.50 k 3464.71
1950 687.50 h 287.50 n 416.00 k 440.69 a 294.00 l 207.41 a 13.50 32.03 a 197.78 c 190.50 218.00 n 0.00 z 1081.91
1951 485.00 k 126.00 w 0.00 z 0.00 z 401.40 b 226.20 e 16.50 32.03 a 24.11 b 297.82 c 333.00 k 0.00 z 998.06
1952 570.00 k 0.00 z 0.00 z 0.00 z 100.50 u 173.00 g 10.33 a 1.50 f 41.50 g 141.57 a 427.50 j 800.50 952.40
1953 221.50 v 444.00 j 527.50 h 298.00 p 198.50 t 187.78 c 0.00 42.22 b 51.00 337.50 490.86 a 689.50 1798.86
1954 781.50 544.17 e 453.00 o 142.00 t 169.00 i 196.50 0.00 f 98.50 77.07 a 313.10 a 485.50 762.50 3258.84
1955 1014.73 a 823.00 714.50 651.00 342.79 e 189.83 a 59.93 a 2.00 126.00 f 182.50 541.67 c 25.50 z 4521.95
1956 468.50 m 574.00 h 545.00 383.50 j 199.50 k 84.50 37.72 a 60.93 b 18.89 c 393.70 a 317.50 g 637.22 d 1777.96
1957 876.50 567.00 655.13 a 530.19 d 525.21 e 51.96 b 8.27 a 50.00 88.50 434.00 a 652.00 240.50 q 4438.77
1958 702.67 d 426.00 i 604.00 j 443.50 g 182.68 c 118.00 f 59.42 a 0.50 69.00 200.50 529.14 a 506.33 a 2250.23
1959 541.00 f 809.50 298.00 o 404.40 e 415.63 d 43.50 g 0.00 26.00 160.50 272.59 b 404.50 618.00 3111.12
1960 929.00 752.00 472.50 445.18 b 316.20 a 25.50 4.00 6.00 24.50 f 370.50 381.00 l 415.00 i 3320.88
1961 597.50 499.85 a 616.50 415.00 405.00 106.00 6.72 a 8.50 135.00 329.50 621.21 a 754.00 4494.78
1962 441.50 l 237.50 p 840.58 e 297.00 451.57 a 156.43 b 1.50 m 13.95 a 60.00 346.96 e 533.50 681.47 b 3381.45
1963 919.00 539.00 d 830.11 d 386.50 m 352.37 a 99.00 p 15.50 f 15.00 g 69.23 d 293.95 c 588.75 b 547.00 f 3592.40
1964 836.45 c 590.50 f 789.39 c 597.00 444.85 a 197.50 5.17 d 0.00 z 94.00 f 166.50 695.00 737.50 4469.36
1965 710.00 696.50 781.50 653.00 448.90 e 302.00 23.00 60.00 274.66 a 215.50 611.50 844.50 5621.06
1966 896.50 851.93 a 653.50 466.00 311.50 152.50 35.50 29.00 171.21 a 401.50 598.39 b 518.50 i 4567.53
1967 450.50 j 403.00 h 650.40 e 663.00 g 295.00 h 209.40 e 2.14 b 5.34 b 211.15 d 367.41 d 452.78 c 231.50 u 1898.63
1968 503.50 j 377.00 j 643.25 e 548.65 d 286.50 g 127.00 15.50 b 113.15 a 124.66 a 385.20 d 475.50 g 619.50 g 1957.41
1969 614.50 f 833.30 e 825.67 e 540.58 d 366.32 a 196.00 30.50 2.50 110.56 c 418.00 526.03 a 675.00 4524.46
1970 693.00 558.50 691.50 626.50 242.50 121.50 2.50 0.00 89.00 330.00 502.00 897.00 4754.00
1971 807.50 718.50 645.32 a 188.50 u 489.00 179.00 13.00 2.50 125.50 463.50 611.50 964.00 5019.32
1972 759.50 594.50 395.00 495.52 a 343.00 99.00 6.50 44.95 a 140.50 488.50 716.00 880.50 4963.47
1973 901.50 733.50 899.50 544.00 243.00 93.62 a 5.00 34.50 91.00 315.50 650.69 a 668.50 5180.31
1974 866.00 652.81 a 666.50 a 518.00 303.80 a 45.00 a 26.87 a 12.00 21.00 299.00 521.50 781.50 4713.98
1975 678.00 716.00 781.72 a 771.50 344.50 129.50 14.50 45.50 29.50 326.00 510.50 664.50 5011.72
1976 636.00 644.50 720.75 a 608.00 287.50 126.50 13.00 88.00 150.00 315.50 432.00 667.00 4688.75
1977 766.00 536.50 821.00 456.50 590.00 63.50 20.00 9.82 a 123.00 210.50 400.50 507.88 a 4505.20
1978 744.00 690.67 a 596.50 627.00 316.72 a 75.50 27.00 42.00 135.00 192.00 646.50 856.12 a 4949.00
1979 899.50 735.00 747.00 495.00 301.50 73.50 36.50 57.00 11.50 290.88 a 597.86 b 615.00 4860.24
1980 718.00 617.00 754.16 b 475.34 a 522.00 156.72 a 5.34 b 63.00 58.45 a 271.00 454.66 a 517.00 4612.67
1981 659.50 571.93 a 719.50 386.90 a 287.00 9.64 b 1.50 0.00 27.00 406.10 a 478.00 559.50 4106.57
1982 806.00 620.00 745.00 520.50 331.00 182.00 41.50 2.50 184.50 351.50 666.00 767.50 5218.00
1983 676.00 633.00 728.50 691.00 324.00 168.00 29.50 58.50 73.00 338.50 606.50 689.00 5015.50
1984 674.50 638.50 571.50 527.00 119.50 150.00 8.50 6.00 54.00 448.50 655.50 845.00 4698.50
1985 790.00 665.00 749.50 378.50 320.50 79.00 11.00 23.00 264.50 353.50 663.00 678.50 4976.00
1986 529.00 609.50 582.50 507.50 291.00 78.50 60.50 1.50 321.50 414.00 523.00 730.00 4648.50
1987 800.00 722.50 746.50 336.00 355.00 74.50 96.00 38.50 105.50 275.00 629.00 876.50 5055.00
1988 733.50 593.50 584.00 528.50 342.50 145.50 9.50 24.00 111.00 132.50 568.00 819.00 4591.50
1989 814.00 714.00 516.50 298.50 330.50 137.00 4.50 72.00 97.00 352.00 464.00 625.00 4425.00
1990 782.50 770.50 643.50 488.50 415.00 107.00 3.50 63.00 123.50 218.50 541.50 848.00 5005.00
1991 757.50 507.50 874.00 584.50 443.50 209.00 32.00 30.50 63.00 242.50 480.50 743.00 4967.50
1992 751.00 653.50 743.50 387.50 238.50 172.50 58.00 24.50 39.50 280.50 613.50 0.00 z 3962.50
1993 783.50 751.00 588.00 444.00 299.50 155.00 103.50 57.00 122.50 323.50 606.21 a 742.50 4976.21
1994 687.00 761.00 609.50 526.50 400.00 70.00 10.50 0.00 57.50 397.50 751.00 744.00 5014.50
1995 808.50 479.50 677.50 568.00 476.50 204.50 38.00 2.00 60.00 228.50 374.00 670.00 4587.00
1996 666.50 602.50 619.50 402.00 282.50 98.50 2.00 14.00 94.50 357.50 519.50 662.50 4321.50
1997 782.00 667.00 485.00 510.00 123.50 173.50 17.00 3.00 33.50 350.50 563.50 785.00 4493.50
1998 723.50 778.00 0.00 z 657.00 0.00 z 247.00 7.50 7.00 159.50 0.00 z 576.50 723.00 3879.00
1999 0.00 z 595.00 703.18 a 682.24 a 371.50 170.00 16.00 39.78 a 51.72 a 163.00 411.00 653.07 a 3856.50
2000 636.50 660.00 652.00 375.00 a 191.50 63.00 47.00 15.50 a 111.50 375.50 660.00 570.00 4357.50
2001 850.00 780.37 a 624.98 c 572.50 98.74 d 36.00 18.00 0.52 a 2.50 125.07 b 495.00 758.47 a 4362.15
2002 686.50 483.00 621.50 401.50 273.50 27.50 0.00 2.50 53.50 346.00 431.00 790.00 4116.50
2003 459.00 632.00 568.00 601.00 256.50 78.50 0.00 f 0.00 8.50 86.50 633.00 724.00 4047.00
2004 716.50 762.00 361.00 427.50 278.00 57.00 4.50 g 11.50 86.00 390.00 654.00 683.50 4427.00
2005 761.00 710.35 e 649.00 497.50 262.00 136.50 f 5.00 1.50 93.00 296.00 419.00 604.00 4298.35
2006 688.50 543.00 0.00 z 565.50 187.19 e 28.00 2.50 8.50 f 62.00 f 325.50 e 328.50 i 508.50 i 2340.19
2007 650.00 f 635.50 506.69 b 411.00 219.00 54.00 3.00 0.00 160.80 e 251.58 e 367.00 798.00 3406.57
2008 767.50 665.50 558.00 388.00 377.50 44.40 e 0.00 0.60 e 29.00 135.00 f 397.00 746.50 3974.00
2009 592.00 719.00 636.05 c 469.50 90.70 d 240.00 c 0.00 z 11.00 22.00 352.00 451.50 786.50 4370.26
2010 722.50 682.00 639.00 585.50 383.33 e 92.50 10.00 42.00 57.00 306.42 e 596.50 602.00 4718.75
2011 637.64 b 757.62 b 478.00 g 271.50 j 405.00 117.00 j 30.00 0.00 19.00 i 232.50 589.00 805.50 3457.25
2012 581.77 a 679.35 b 634.50 414.50 210.00 31.00 4.00 0.00 12.00 235.17 b 471.00 768.50 4041.79
2013 754.50 700.00 504.78 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 36.50 z 1959.28
Period of Record Statistics
MEAN 755.47 663.52 663.29 502.27 331.09 127.57 20.19 26.91 95.61 308.98 551.17 721.48 4728.84
S.D. 119.00 92.30 114.19 102.84 107.41 66.23 21.92 27.33 66.43 91.00 100.81 103.14 351.47
SKEW 0.60 -0.08 -0.26 0.25 -0.12 0.20 1.86 1.05 1.15 -0.20 -0.02 -0.09 0.06
MAX 1171.91 851.93 899.50 771.50 590.00 302.00 103.50 113.15 321.50 537.50 751.00 964.00 5621.06
MIN 459.00 479.50 361.00 297.00 90.70 9.64 0.00 0.00 2.50 86.50 367.00 506.33 4041.79
NO YRS 54 55 57 55 59 61 62 65 63 67 60 54 33