MAUNA LOA SLOPE OBS, HAWAII

Monthly Total Heating Degree Days

(516198)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1955 810.17 e 777.00 867.48 a 670.18 b 639.50 504.83 a 621.03 a 592.62 a 564.64 b 630.50 703.00 731.50 8112.46
1956 770.02 c 826.50 793.00 680.00 c 0.00 z 558.21 b 436.00 k 620.00 571.50 630.50 634.14 a 696.50 6780.37
1957 793.60 a 823.76 c 721.50 648.10 a 434.50 h 409.50 f 361.00 i 561.62 a 521.00 563.00 597.50 714.07 b 5944.15
1958 681.00 535.50 714.50 560.50 512.00 427.50 538.00 538.00 485.50 551.50 575.50 706.00 6825.50
1959 673.50 664.00 618.50 542.00 314.50 m 238.50 m 480.50 a 552.50 530.50 531.00 607.80 e 725.00 5925.30
1960 709.50 706.00 786.00 680.19 d 576.94 d 530.00 550.00 511.50 482.00 615.00 641.00 731.50 7519.64
1961 701.50 641.41 a 676.50 616.50 659.50 476.00 526.00 523.50 557.59 a 646.00 694.00 755.00 7473.49
1962 746.00 745.00 815.50 659.50 687.50 545.50 520.50 269.00 o 539.44 c 561.00 628.00 462.50 j 6447.94
1963 762.17 b 615.00 781.00 689.00 741.00 601.00 619.50 538.50 522.50 587.50 644.50 629.30 a 7730.97
1964 741.42 a 741.00 805.00 696.50 660.50 486.00 576.00 548.50 552.50 612.50 714.50 722.00 7856.42
1965 726.50 824.00 790.50 692.00 658.50 531.50 588.00 574.50 571.50 597.00 630.00 723.00 7907.00
1966 704.00 682.00 645.00 660.00 579.00 398.50 464.00 502.50 522.00 592.50 658.50 750.00 7158.00
1967 800.00 606.00 733.50 716.00 668.50 547.00 533.50 553.00 521.50 607.00 689.00 764.00 7739.00
1968 731.00 664.00 679.50 706.50 571.00 521.50 542.00 544.50 595.50 582.50 546.00 710.00 7394.00
1969 800.46 c 657.50 780.17 a 648.00 555.50 467.00 420.50 f 578.00 487.50 561.50 609.50 668.00 6813.13
1970 737.00 640.50 711.00 759.50 656.00 478.50 584.50 554.00 553.50 602.00 687.00 841.00 7804.50
1971 881.50 679.50 698.00 743.00 698.50 535.00 560.50 621.00 606.00 580.50 685.50 803.50 8092.50
1972 842.00 762.00 696.00 730.50 701.50 532.50 563.00 562.00 557.00 597.50 583.50 654.00 7781.50
1973 621.50 633.00 816.50 598.50 649.50 405.00 528.50 520.00 493.00 560.21 c 683.50 760.50 7269.71
1974 770.00 728.00 780.54 c 0.00 z 699.00 601.50 622.50 556.50 584.00 640.50 725.00 765.59 c 7473.12
1975 892.00 506.00 i 735.00 675.00 639.00 518.00 626.00 592.50 550.50 607.50 664.00 802.00 7301.50
1976 877.00 808.50 877.00 755.00 702.50 528.50 570.50 572.00 618.00 636.00 0.00 z 722.00 7667.00
1977 637.50 602.52 a 749.50 692.00 620.00 d 550.00 526.50 534.50 537.00 596.00 604.00 671.00 7320.52
1978 684.50 623.00 690.50 697.50 597.00 578.50 596.50 581.50 580.50 619.50 731.50 778.00 7758.50
1979 853.61 c 567.00 g 778.50 651.43 b 587.00 544.00 543.50 542.00 528.50 593.65 a 600.58 d 619.00 6841.76
1980 472.50 j 561.74 b 463.50 l 621.50 605.00 505.50 519.00 531.00 533.00 562.50 543.00 590.00 5572.24
1981 612.00 637.26 a 681.50 645.50 498.50 471.50 460.00 521.50 531.00 583.00 564.00 624.50 6830.26
1982 711.50 654.64 c 772.50 632.00 580.50 479.00 519.00 560.50 580.50 530.50 506.00 625.00 7151.64
1983 543.00 542.50 547.31 b 650.00 568.50 512.00 444.50 479.50 527.68 b 588.00 515.00 c 667.00 6584.99
1984 734.70 a 682.00 601.18 c 610.18 b 591.50 411.50 545.17 b 472.46 d 540.50 528.00 585.50 689.00 6991.69
1985 639.50 643.50 754.00 678.00 613.50 498.00 501.50 504.00 485.50 539.50 565.50 611.00 7033.50
1986 534.00 520.59 a 581.50 636.00 528.50 443.50 492.50 444.00 497.00 520.00 549.00 550.25 a 6296.84
1987 666.00 0.00 z 655.50 552.00 597.50 558.50 522.00 469.00 507.00 505.50 586.00 636.50 6255.50
1988 676.50 684.00 691.30 a 646.00 553.00 449.50 532.00 495.50 471.00 e 584.00 624.23 d 738.50 7145.53
1989 827.50 708.50 696.00 765.00 703.00 510.50 541.50 510.00 491.00 579.18 a 572.00 665.47 a 7569.65
1990 692.50 685.48 a 680.50 555.54 b 535.00 426.00 593.65 a 500.50 557.68 b 581.00 580.50 711.50 7099.85
1991 653.67 b 586.88 c 745.50 598.50 545.50 526.00 438.50 546.50 495.50 524.00 515.00 647.00 6822.55
1992 628.00 624.00 613.50 535.50 500.50 401.50 510.50 528.50 359.00 i 367.00 i 345.50 k 466.00 i 4342.00
1993 423.00 m 433.50 h 508.00 h 379.50 h 373.50 k 289.00 h 332.50 k 301.50 l 409.50 h 383.50 j 399.00 j 420.00 j 0.00
1994 447.00 k 445.00 i 480.00 h 396.50 i 370.00 j 355.50 h 311.50 k 366.00 h 350.50 j 340.50 k 401.00 j 377.00 j 0.00
1995 356.50 k 435.00 i 404.50 j 364.50 j 376.00 i 286.00 h 303.50 k 378.00 h 276.50 j 348.00 j 399.50 j 388.50 k 0.00
1996 434.00 l 462.00 i 471.50 k 395.00 h 332.00 i 338.50 j 383.00 h 343.50 i 313.50 j 375.50 i 369.00 k 448.50 j 0.00
1997 443.50 j 417.50 j 517.50 j 450.50 h 391.50 j 340.00 i 331.50 i 282.50 m 368.00 i 376.00 i 352.00 m 419.50 j 0.00
1998 356.50 k 341.50 i 413.50 i 425.00 h 359.00 k 298.50 h 351.50 i 353.00 j 358.00 i 364.00 j 385.50 j 448.50 i 0.00
1999 440.00 l 465.50 i 517.00 h 532.00 h 355.50 k 329.00 h 325.00 j 329.50 i 370.00 i 326.50 k 398.50 j 451.50 k 0.00
2000 516.50 k 419.50 i 501.50 h 385.50 j 366.00 i 341.00 h 319.50 k 360.50 h 331.50 j 399.50 j 413.50 k 414.00 k 0.00
2001 407.50 j 447.50 i 492.00 i 445.50 i 414.00 i 383.00 i 341.00 j 363.50 h 307.50 k 388.50 i 348.50 j 380.00 l 0.00
2002 446.00 j 388.00 k 515.00 j 539.00 438.00 i 298.50 j 311.50 i 333.00 i 312.50 j 384.00 i 289.00 k 405.50 j 539.00
2003 360.00 k 357.50 i 396.00 j 459.00 h 430.50 i 347.00 i 342.50 i 326.00 j 345.00 i 342.50 i 311.00 l 427.50 j 0.00
2004 402.00 l 374.50 j 538.50 h 493.00 h 385.00 k 332.00 i 325.00 k 329.50 i 373.00 i 403.50 k 391.00 k 447.50 j 0.00
2005 392.00 m 468.00 i 464.00 h 400.00 i 368.50 j 356.00 h 323.50 k 371.00 h 340.00 i 342.50 k 396.00 j 433.00 j 0.00
2006 448.00 k 472.00 i 551.50 h 419.50 j 411.00 i 289.00 i 312.00 k 387.50 h 320.50 j 401.50 i 394.00 j 374.00 k 0.00
2007 384.00 k 375.00 k 321.50 o 329.00 m 375.50 i 329.50 i 329.50 j 352.50 j 336.00 l 392.50 h 426.50 j 500.00 k 0.00
2008 456.00 m 509.50 i 465.00 j 482.00 i 391.00 k 358.00 i 433.00 i 364.50 j 363.00 i 373.50 i 379.50 l 451.00 j 0.00
2009 458.50 l 482.00 i 580.00 i 495.50 h 348.00 k 340.50 h 382.00 i 349.00 j 309.50 i 390.50 i 406.50 k 473.50 i 0.00
2010 345.00 l 400.00 i 501.00 h 469.50 h 315.50 k 311.00 i 271.00 k 320.50 i 329.50 i 411.50 j 419.00 j 484.00 j 0.00
2011 488.00 k 451.50 i 490.50 h 450.00 i 467.00 j 408.00 h 330.50 k 375.50 h 364.00 i 364.50 j 476.00 j 521.00 j 0.00
2012 457.00 k 478.50 i 509.00 j 470.00 i 450.50 i 332.50 l 308.50 l 371.00 j 339.50 k 375.00 h 387.00 k 388.00 m 0.00
2013 496.00 j 479.00 i 290.00 s 26.50 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
Period of Record Statistics
MEAN 726.12 671.91 723.26 653.48 613.71 501.64 540.02 538.87 536.50 581.83 617.87 699.95 7356.55
S.D. 88.66 81.35 76.59 62.55 65.16 54.97 49.32 40.08 37.43 36.24 62.23 65.31 472.57
SKEW -0.04 0.27 -0.20 -0.25 0.02 -0.30 -0.11 -0.14 0.18 -0.24 0.10 -0.11 -0.29
MAX 892.00 826.50 877.00 765.00 741.00 601.50 626.00 621.00 618.00 646.00 731.50 841.00 8112.46
MIN 534.00 520.59 547.31 535.50 498.50 398.50 438.50 444.00 471.00 505.50 506.00 550.25 6296.84
NO YRS 37 35 37 38 35 36 35 37 37 37 36 36 26