SEATTLE JACKSON PARK, WASHINGTON

Monthly Total Heating Degree Days

(457459)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 198606
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
1961 0.00 z 0.00 z 388.00 h 487.00 312.58 a 108.50 43.50 30.00 219.50 443.00 699.00 768.50 3111.58
1962 810.50 615.50 698.00 411.50 401.00 182.50 114.70 a 86.59 b 141.00 372.00 549.50 685.50 5068.29
1963 950.15 a 476.50 650.50 502.50 291.06 d 192.86 b 105.00 47.50 107.07 a 330.00 596.00 729.50 4978.63
1964 726.50 693.50 648.00 561.21 a 389.57 a 187.00 82.00 111.50 210.56 c 355.00 540.00 f 884.00 4848.83
1965 789.00 663.50 637.00 451.00 393.50 151.11 c 53.73 a 40.19 d 208.00 321.76 b 505.50 793.60 a 5007.89
1966 770.50 648.00 610.50 455.00 314.00 197.00 78.00 82.50 116.00 416.00 587.50 639.50 4914.50
1967 720.00 609.50 702.50 557.50 300.00 89.00 44.00 23.00 92.50 346.50 573.62 a 770.50 4828.62
1968 789.00 549.50 552.50 515.50 296.00 148.00 f 32.50 88.50 194.00 427.00 578.50 901.00 4924.00
1969 1031.00 696.50 608.00 462.93 a 240.50 78.00 75.50 120.50 165.52 a 433.45 c 568.50 666.50 5146.90
1970 758.00 528.50 608.50 525.50 340.00 98.28 a 48.50 58.00 239.50 458.00 594.00 808.50 5065.28
1971 789.00 650.50 732.50 469.50 280.50 226.00 84.50 17.00 203.50 467.00 602.50 872.50 5395.00
1972 915.00 706.50 588.50 559.50 236.00 159.00 70.00 63.50 259.50 464.50 591.00 860.50 5473.50
1973 820.50 595.00 600.00 486.50 289.50 178.50 77.00 121.50 140.00 404.00 692.00 670.50 5075.00
1974 842.00 627.50 627.00 480.00 392.50 177.50 118.50 52.00 83.00 354.50 552.50 698.00 5005.00
1975 787.00 686.00 678.50 581.00 334.50 220.00 58.50 114.00 135.50 404.50 635.00 735.50 5370.00
1976 722.50 693.00 725.50 493.50 342.50 280.50 86.50 124.50 143.50 405.00 570.50 703.00 5290.50
1977 838.00 534.50 678.00 445.00 408.50 185.00 179.00 65.00 269.00 458.00 695.00 745.00 5500.00
1978 704.00 570.00 558.00 0.00 z 0.00 z 99.11 b 54.00 65.00 205.00 352.00 722.00 874.50 4203.61
1979 920.50 677.00 523.50 455.50 257.50 143.50 55.50 29.50 86.00 327.50 641.00 653.07 a 4770.07
1980 911.50 591.00 606.50 374.00 302.00 198.50 72.50 80.50 152.50 343.50 528.50 631.50 4792.50
1981 621.50 602.00 497.00 443.50 304.00 214.00 93.53 b 29.00 149.50 435.50 546.00 728.00 4663.53
1982 794.00 659.50 636.50 532.50 334.00 98.50 97.50 58.00 156.50 402.00 705.50 778.50 5253.00
1983 659.00 524.00 520.00 455.50 231.00 154.00 87.00 31.00 236.00 429.50 544.50 944.50 4816.00
1984 699.00 588.50 528.50 472.00 361.50 200.50 81.50 42.50 155.50 473.50 636.50 893.00 5132.50
1985 859.00 717.50 674.50 464.00 298.00 154.66 a 3.62 a 47.57 b 229.50 432.45 a 896.00 883.50 a 5660.29
1986 630.00 636.00 498.50 515.00 305.50 25.50 u 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2585.00
Period of Record Statistics
MEAN 794.29 621.58 615.54 486.27 318.23 165.56 75.86 65.15 171.93 402.25 617.11 772.75 5105.09
S.D. 100.74 65.34 69.57 49.20 51.53 50.59 33.92 33.51 54.46 48.89 85.03 94.14 269.58
SKEW 0.34 -0.43 -0.14 0.03 0.18 -0.02 0.76 0.45 0.05 -0.23 1.53 0.18 0.32
MAX 1031.00 717.50 732.50 581.00 408.50 280.50 179.00 124.50 269.00 473.50 896.00 944.50 5660.29
MIN 621.50 476.50 497.00 374.00 231.00 78.00 3.62 17.00 83.00 321.76 505.50 631.50 4663.53
NO YRS 25 25 25 25 25 24 25 25 25 25 24 25 21