SEQUIM, WASHINGTON

Monthly Total Heating Degree Days

(457538)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 198009
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
1916 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 121.00 i 182.42 e 155.53 b 1.00 z 394.50 h 763.33 c 864.50 1965.79
1917 875.50 766.00 774.50 563.50 434.52 a 315.00 81.00 s 126.98 e 253.00 454.67 a 541.50 751.00 5856.16
1918 554.50 i 707.30 e 727.50 492.50 409.50 169.50 130.00 119.98 d 153.21 b 318.50 g 0.00 z 0.00 z 2909.50
1919 0.00 z 0.00 z 694.50 533.50 473.78 a 0.00 z 0.00 z 216.48 a 168.00 i 427.50 h 434.00 j 886.71 b 2804.97
1920 830.05 b 766.00 748.50 398.50 m 654.50 68.00 w 159.00 109.50 n 327.93 a 548.50 657.41 a 765.00 5456.90
1921 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 267.32 b 130.00 p 232.50 a 150.00 q 465.57 d 677.59 a 842.17 d 2485.15
1922 978.57 a 839.50 812.41 b 452.50 j 0.00 z 0.00 z 212.50 188.00 271.00 467.00 739.66 a 983.73 a 5492.37
1923 839.67 b 831.60 c 749.17 a 509.46 b 410.75 a 267.41 a 166.48 d 112.93 c 234.83 a 462.00 669.83 a 840.10 a 6094.23
1924 841.00 646.00 716.00 595.50 428.50 399.00 340.50 119.00 r 315.50 471.64 c 730.50 982.38 b 6466.52
1925 828.00 650.50 720.50 546.00 360.38 c 268.89 c 162.50 0.00 z 0.00 z 0.00 z 0.00 z 700.00 4236.76
1926 789.50 611.00 587.50 421.00 381.82 a 162.78 c 140.00 117.00 k 290.50 h 403.00 a 590.50 817.50 4904.59
1927 830.00 663.50 718.00 603.00 469.00 223.50 153.50 157.00 273.50 461.00 742.50 996.28 b 6290.78
1928 790.00 721.50 649.93 b 578.50 346.00 234.00 0.00 z 0.00 z 0.00 z 537.50 642.32 b 827.00 5326.75
1929 990.00 795.41 a 688.00 652.50 b 456.50 250.00 c 167.50 191.50 243.00 250.00 l 732.50 803.00 5969.91
1930 1151.81 b 508.00 h 735.00 534.83 a 499.50 308.79 a 242.12 b 191.50 269.50 559.50 699.31 a 785.16 b 5977.02
1931 736.25 a 681.50 667.53 a 474.83 a 339.00 265.00 c 125.50 f 202.07 d 270.00 b 497.07 b 766.50 845.50 5745.25
1932 913.98 a 784.00 654.10 a 524.50 455.24 d 257.50 270.45 b 193.48 b 291.92 d 479.50 573.75 b 913.50 6311.93
1933 875.50 829.63 a 732.24 b 582.78 c 469.17 e 313.33 c 229.83 b 118.32 a 357.41 a 463.97 a 622.76 a 760.50 6355.44
1934 721.00 625.15 b 579.04 c 391.00 359.17 b 248.89 c 214.70 d 147.25 c 284.00 440.00 572.00 777.50 5359.70
1935 891.25 a 690.08 d 764.67 a 594.23 d 442.27 a 234.31 a 193.23 a 175.15 a 39.00 y 544.00 730.50 468.00 l 5259.69
1936 785.00 967.00 762.00 473.50 337.00 194.42 d 150.50 111.00 307.00 383.50 661.50 779.50 5911.92
1937 1127.50 787.50 643.50 576.00 414.00 243.50 277.50 0.00 z 0.00 z 0.00 z 531.50 706.00 5307.00
1938 769.00 687.50 669.50 469.50 341.00 180.54 b 109.50 152.00 98.50 398.00 646.00 706.00 5227.04
1939 656.50 718.50 661.00 458.00 339.00 249.00 143.50 48.00 0.00 z 397.50 497.00 631.00 4799.00
1940 719.00 616.00 557.00 395.00 268.50 162.00 115.00 72.50 149.50 255.50 j 691.00 663.00 4408.50
1941 722.50 561.00 532.50 308.50 f 316.00 195.00 62.00 103.50 271.00 418.50 574.50 751.00 4507.50
1942 790.50 651.00 668.00 466.00 338.50 201.00 90.00 81.50 216.00 416.00 693.00 742.50 5354.00
1943 963.00 642.50 690.50 442.50 416.00 257.50 173.00 170.50 182.50 418.50 595.00 757.00 5708.50
1944 769.50 703.00 697.50 510.50 48.00 z 0.00 z 0.00 z 164.62 b 181.00 337.50 580.50 807.00 4751.12
1945 727.50 648.00 693.50 571.00 316.50 256.50 167.50 174.00 260.00 402.50 700.00 771.50 5688.50
1946 755.50 667.50 687.50 548.00 302.77 a 267.00 147.50 153.50 263.50 527.00 729.00 813.00 5861.77
1947 919.50 608.72 c 621.00 494.50 299.50 226.03 a 147.50 156.50 230.00 479.50 673.50 749.00 5605.25
1948 818.50 777.50 737.00 611.50 408.00 159.50 162.50 179.50 254.00 508.00 681.00 926.00 6223.00
1949 1046.50 810.50 653.00 521.00 313.00 278.00 209.50 145.70 a 215.00 563.50 542.50 838.50 6136.70
1950 1245.50 689.36 c 764.50 594.00 478.00 208.00 181.50 151.00 240.50 537.00 696.50 698.00 6483.86
1951 864.50 726.00 801.50 501.00 370.00 202.50 152.50 159.50 257.50 493.50 651.00 883.50 6063.00
1952 920.00 746.00 732.50 550.50 417.50 323.79 a 193.00 155.00 194.00 375.62 a 701.50 771.50 6080.91
1953 730.00 690.15 a 719.00 572.50 406.50 315.00 a 163.50 106.00 216.50 422.50 550.00 723.33 a 5614.98
1954 912.43 a 658.00 a 758.00 621.00 419.50 349.50 223.72 a 219.50 207.41 a 505.50 508.45 a 489.50 k 5383.01
1955 484.00 l 295.50 p 788.50 610.00 476.50 274.00 235.50 184.93 b 231.50 530.50 860.00 908.82 a 5100.25
1956 888.67 a 858.50 783.50 508.00 316.00 335.50 140.02 a 140.00 253.45 a 404.55 a 580.50 710.50 5919.18
1957 883.00 657.50 585.90 a 533.79 a 87.50 t 199.00 173.50 149.50 100.34 a 462.93 a 658.93 b 724.37 a 5128.77
1958 706.50 535.50 651.50 505.00 244.00 104.50 35.13 a 63.50 202.50 409.50 703.50 668.00 4829.13
1959 795.50 687.50 676.00 497.07 a 398.50 199.50 114.00 153.50 248.00 450.50 679.00 766.73 a 5665.80
1960 808.00 701.50 696.50 480.00 394.50 238.00 106.50 150.00 230.00 399.50 637.00 758.50 5600.00
1961 679.50 592.00 599.50 511.00 355.50 152.00 72.00 54.00 239.50 480.50 729.50 794.50 5259.50
1962 788.00 644.00 719.50 483.50 440.00 246.00 173.00 138.00 198.50 405.50 582.50 689.50 5508.00
1963 882.00 539.00 657.50 511.03 a 321.00 220.50 157.00 106.50 126.00 380.50 622.50 709.00 5232.53
1964 746.00 677.50 665.50 545.50 417.97 b 248.50 142.00 143.50 240.00 439.00 694.50 906.00 5865.97
1965 809.50 646.50 640.00 484.50 432.50 227.00 124.00 91.97 a 254.00 356.50 565.50 774.50 5406.47
1966 803.50 637.50 654.00 493.00 373.00 236.50 157.50 102.50 152.50 444.00 581.50 678.00 5313.50
1967 728.00 614.50 713.00 561.50 359.00 124.50 112.00 38.50 110.50 405.00 600.50 759.50 5126.50
1968 773.50 612.00 595.00 545.00 315.50 230.50 74.00 137.00 219.00 475.50 607.00 898.00 5482.00
1969 1043.50 715.00 613.50 531.00 272.00 106.00 113.00 156.50 211.00 439.00 608.00 701.50 5510.00
1970 788.50 587.00 614.50 542.50 398.50 160.00 132.50 129.50 279.50 488.00 637.00 814.50 5572.00
1971 788.50 667.00 731.50 521.00 346.00 292.50 132.00 44.50 232.00 461.50 609.00 887.00 5712.50
1972 915.00 711.50 625.50 602.50 275.50 226.50 100.00 68.00 301.00 453.00 612.50 869.50 5760.50
1973 868.00 645.50 620.00 495.50 326.50 243.00 106.95 a 172.00 181.50 459.50 720.00 671.50 5509.95
1974 820.50 645.00 641.50 481.50 425.00 210.58 d 156.00 122.00 139.00 420.00 611.50 717.65 a 5390.23
1975 808.50 456.50 j 695.50 582.50 368.50 230.50 107.00 162.00 164.00 468.00 677.00 381.00 o 4263.50
1976 782.00 699.50 744.50 501.00 375.50 263.00 140.07 d 149.46 c 142.50 432.50 0.00 z 708.00 4938.04
1977 840.00 565.50 669.00 467.50 398.00 191.00 163.00 70.50 239.00 477.92 a 694.00 794.50 5569.92
1978 728.50 b 612.00 572.97 b 504.00 373.50 128.50 91.00 112.00 241.00 396.00 763.50 870.50 5393.47
1979 984.50 715.56 a 587.93 b 512.50 323.95 a 240.52 a 101.02 b 78.02 a 105.00 371.50 678.75 b 689.50 5388.74
1980 947.64 b 630.23 a 645.00 429.00 342.03 a 267.50 167.00 138.47 a 228.21 b 0.00 z 0.00 z 0.00 z 3795.08
Period of Record Statistics
MEAN 845.52 687.49 681.83 523.55 382.66 234.16 155.26 137.10 224.25 451.75 651.16 788.82 5676.60
S.D. 116.26 83.60 64.61 56.07 69.38 58.76 54.71 45.56 58.94 53.47 73.19 86.23 380.17
SKEW 1.21 0.80 -0.12 -0.08 0.86 0.06 0.74 -0.31 -0.37 0.21 0.11 0.51 0.28
MAX 1245.50 967.00 812.41 652.50 654.50 399.00 340.50 232.50 357.41 563.50 860.00 996.28 6483.86
MIN 656.50 535.50 532.50 391.00 244.00 104.50 35.13 38.50 98.50 337.50 497.00 631.00 4829.13
NO YRS 60 59 63 60 60 60 59 59 56 57 60 60 39