BELLINGHAM INTL AP, WASHINGTON

Monthly Total Heating Degree Days

(450574)

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
1949 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 884.00 884.00
1950 1375.76 b 722.50 722.00 560.50 438.00 167.00 111.50 97.50 248.00 502.00 692.50 641.00 6278.26
1951 893.00 731.00 849.50 499.00 341.00 147.50 92.50 115.50 227.00 492.50 667.50 967.00 6023.00
1952 946.50 727.50 714.50 530.50 356.50 289.50 139.00 125.50 201.50 407.00 730.50 736.50 5905.00
1953 678.00 690.50 670.00 515.50 353.00 273.50 110.50 83.50 226.50 416.50 539.50 709.50 5266.50
1954 1023.50 658.50 778.50 598.00 379.00 291.00 195.50 180.00 225.50 506.00 518.50 745.00 6099.00
1955 839.00 780.00 846.00 615.50 474.50 246.00 197.00 192.50 287.00 498.00 866.00 914.50 6756.00
1956 864.50 886.50 768.00 488.50 287.50 253.50 93.50 87.00 252.93 a 512.00 729.00 808.50 6031.43
1957 1146.50 802.50 685.50 462.00 251.50 174.50 163.00 137.50 143.00 490.00 685.86 a 704.22 a 5846.08
1958 691.00 563.00 671.00 491.00 210.00 81.50 11.00 37.00 215.00 418.00 688.50 730.50 4807.50
1959 833.00 726.00 656.00 514.50 367.00 176.50 83.50 162.00 282.50 464.48 a 723.00 797.00 5785.48
1960 863.50 703.00 701.50 472.50 379.00 224.00 66.50 156.50 274.00 410.00 659.50 826.00 5736.00
1961 720.00 577.50 586.50 508.50 331.50 133.00 57.57 c 33.00 274.00 507.00 732.50 801.50 5262.57
1962 862.00 644.00 740.00 472.50 431.00 220.00 138.00 134.50 239.50 413.00 561.00 713.50 5569.00
1963 1021.00 550.00 676.50 512.00 342.00 212.50 145.00 63.50 146.50 395.50 607.50 774.00 5446.00
1964 716.50 728.00 689.50 583.50 416.00 227.50 139.00 152.50 289.50 431.50 723.50 998.00 6095.00
1965 878.00 675.00 707.00 497.50 430.00 199.50 98.00 101.00 286.50 379.00 581.50 862.50 5695.50
1966 865.00 708.00 692.00 535.50 418.50 248.00 168.00 127.50 207.00 520.00 640.50 690.50 5820.50
1967 776.50 673.50 737.00 617.50 368.50 112.00 66.50 23.50 134.50 395.00 610.00 788.00 5302.50
1968 796.50 634.00 580.50 550.00 324.50 196.00 65.00 108.50 256.00 457.00 598.50 923.00 5489.50
1969 1146.00 694.00 672.00 560.50 311.00 122.50 145.50 196.50 265.00 498.00 606.00 725.00 5942.00
1970 850.00 590.50 644.50 546.00 378.00 155.50 102.00 110.50 273.00 498.00 652.50 857.00 5657.50
1971 885.00 710.00 771.50 566.00 390.00 308.50 136.50 64.50 295.50 539.00 652.50 977.50 6296.50
1972 1010.50 736.50 640.00 601.50 323.50 236.00 111.00 82.50 355.50 573.50 625.50 915.00 6211.00
1973 881.50 710.00 696.50 540.00 351.50 225.50 0.00 z 157.00 167.50 453.00 710.00 686.00 5578.50
1974 823.50 627.50 619.50 485.50 412.50 189.00 137.50 101.50 129.00 445.50 622.50 712.50 5306.00
1975 875.50 783.50 728.50 621.00 387.50 255.50 88.00 149.50 209.50 494.00 620.00 810.50 6023.00
1976 749.50 728.50 784.50 523.00 386.50 247.50 79.50 124.50 188.50 430.50 611.50 686.50 5540.50
1977 916.00 549.50 643.50 409.14 a 370.50 134.00 110.00 54.00 224.50 432.00 634.00 839.50 5316.64
1978 809.00 604.00 558.00 445.50 307.50 117.50 78.00 92.00 245.00 449.50 805.50 918.50 5430.00
1979 1079.00 734.50 638.17 b 500.00 322.50 216.00 86.50 65.50 156.00 420.50 730.50 673.50 5622.67
1980 1005.00 646.50 686.50 437.50 359.50 240.00 133.50 161.50 213.50 431.00 601.00 767.00 5682.50
1981 716.50 658.00 587.50 508.50 338.00 265.00 114.50 77.00 210.50 501.50 580.50 801.00 5358.50
1982 926.00 695.50 719.50 591.50 389.50 145.00 148.50 126.00 198.50 455.50 750.50 796.00 5942.00
1983 674.00 579.00 535.00 504.00 299.50 199.50 135.00 74.50 296.50 537.00 572.00 1053.50 5459.50
1984 798.00 649.00 607.00 530.50 427.00 241.50 122.00 101.00 289.00 553.50 640.50 1024.50 5983.50
1985 973.50 740.00 700.00 490.00 337.00 202.00 12.00 79.00 248.50 437.00 981.00 944.50 6144.50
1986 612.00 700.50 555.00 551.00 333.00 150.00 165.50 38.50 239.00 418.00 656.00 760.50 5179.00
1987 780.50 573.00 544.00 418.00 309.00 165.00 93.50 86.50 178.50 402.00 526.50 843.00 4919.50
1988 838.00 656.00 640.50 474.50 326.00 213.00 113.00 86.50 249.50 373.50 588.50 747.00 5306.00
1989 813.00 872.67 a 699.00 391.50 335.50 134.00 92.50 98.50 175.50 428.00 595.50 743.50 5379.17
1990 735.50 759.00 616.50 413.00 311.50 182.50 32.00 43.50 155.50 471.00 590.50 973.00 5283.50
1991 912.50 524.50 699.50 481.50 343.00 232.50 75.00 65.00 174.50 504.50 590.00 697.00 5299.50
1992 667.00 577.50 512.50 399.50 243.00 111.00 64.50 85.50 255.00 390.50 634.50 888.50 4829.00
1993 999.00 726.50 575.00 435.50 196.50 165.50 128.00 97.00 227.50 379.00 768.50 769.50 5467.50
1994 620.50 730.50 556.00 408.00 270.00 201.50 57.50 37.00 141.50 453.00 711.50 766.50 4953.50
1995 742.00 606.00 603.00 461.50 230.00 125.50 52.50 142.50 100.50 456.00 524.00 755.50 4799.00
1996 893.00 690.50 628.50 410.50 366.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2989.00
1997 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
1998 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 163.50 l 486.50 578.50 803.50 1868.50
1999 738.50 622.50 676.00 560.50 435.50 255.00 144.50 83.50 263.50 517.50 588.00 768.50 5653.50
2000 843.00 694.50 687.00 482.00 414.50 211.00 112.50 162.00 253.50 461.00 731.00 874.50 5926.50
2001 774.00 754.50 648.00 531.50 381.50 273.00 143.00 107.50 261.00 520.50 571.50 814.00 5780.00
2002 804.00 702.00 830.00 543.00 426.00 176.00 121.00 112.00 259.00 534.50 579.83 a 723.50 5810.83
2003 673.50 710.00 614.00 486.72 a 374.00 164.00 64.00 75.00 204.00 391.00 750.50 764.00 5270.72
2004 819.00 670.50 585.50 421.50 318.50 150.50 50.00 43.50 272.00 455.50 653.00 743.00 5182.50
2005 818.50 715.50 569.00 465.00 256.50 203.00 93.00 74.50 0.00 z 0.00 z 0.00 z 0.00 z 3195.00
2006 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
2007 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
2008 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
2009 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
2010 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
2011 761.00 743.50 597.78 a 387.00 k 396.00 188.79 a 108.50 63.50 133.00 454.00 698.50 790.50 4935.08
2012 801.00 627.64 a 697.00 458.28 a 362.00 267.00 101.50 73.00 211.50 438.50 569.50 756.00 5362.92
2013 858.50 571.50 595.20 a 17.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 31.00 z 2025.20
Period of Record Statistics
MEAN 849.34 681.51 663.73 503.23 350.34 198.95 105.42 100.19 224.75 459.96 651.95 806.86 5606.42
S.D. 139.03 76.49 77.88 60.15 59.97 53.23 41.10 42.45 53.66 49.62 87.33 96.83 421.53
SKEW 1.14 0.14 0.34 0.07 -0.49 -0.07 -0.08 0.36 -0.27 0.19 1.20 0.71 0.16
MAX 1375.76 886.50 849.50 621.00 474.50 308.50 197.00 196.50 355.50 573.50 981.00 1053.50 6756.00
MIN 612.00 524.50 512.50 391.50 196.50 81.50 11.00 23.50 100.50 373.50 518.50 641.00 4799.00
NO YRS 57 57 57 55 56 55 54 55 54 55 55 56 52