SEATTLE JACKSON PARK, WASHINGTON

Monthly Total Growing Degree Days

(457459)

Base Temperature = 40 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 187.00 h 263.00 468.62 a 674.00 807.50 813.00 536.00 333.50 92.50 80.00 4068.12
1962 80.00 145.00 115.00 338.50 374.00 569.50 700.60 a 702.84 b 615.00 403.00 202.50 134.00 4379.94
1963 24.28 a 230.50 127.00 247.50 509.20 d 566.25 b 674.50 749.50 665.69 a 446.00 171.00 88.50 4499.93
1964 65.00 51.50 134.50 188.79 a 391.63 a 574.50 709.00 694.00 550.00 c 420.00 84.50 f 39.50 3818.43
1965 48.50 66.00 159.00 299.00 381.50 599.44 c 789.47 a 804.85 d 542.00 453.24 b 250.50 71.82 a 4465.32
1966 64.00 71.50 179.50 295.00 461.00 559.00 708.00 710.50 636.50 359.00 166.50 152.00 4362.50
1967 83.50 97.00 86.50 192.50 479.00 675.00 761.00 854.50 684.50 428.50 183.10 a 84.50 4609.60
1968 78.50 179.50 223.00 237.50 479.50 456.50 f 818.50 720.50 564.00 348.00 175.50 31.00 3855.50
1969 13.50 36.50 172.00 287.07 a 564.00 746.00 722.00 663.50 592.76 a 341.55 c 186.00 112.50 4437.38
1970 74.00 175.50 171.00 224.50 435.00 708.10 a 776.00 735.50 510.50 317.00 194.00 30.50 4351.60
1971 85.00 97.00 80.00 280.50 500.50 524.50 795.50 860.00 547.00 320.00 151.50 9.00 4250.50
1972 26.50 76.50 196.00 192.00 558.00 594.00 754.00 756.00 499.00 311.50 163.00 89.50 4216.00
1973 70.50 112.50 175.00 263.50 501.00 586.00 743.00 666.00 628.50 371.00 89.50 115.00 4321.50
1974 80.00 80.00 161.50 270.00 382.50 577.50 671.00 765.50 709.00 420.50 197.50 109.50 4424.50
1975 60.50 58.00 101.50 173.00 440.50 538.00 766.50 680.00 639.00 372.50 147.50 98.50 4075.50
1976 82.50 59.50 87.00 259.00 434.00 472.50 703.00 653.50 613.50 370.00 200.00 94.00 4028.50
1977 55.50 167.50 101.50 305.00 366.50 569.00 596.00 797.50 481.50 317.00 122.00 81.50 3960.50
1978 97.00 140.50 224.50 0.00 z 0.00 z 693.75 b 791.50 759.00 546.00 423.00 103.00 32.50 3810.75
1979 24.00 70.50 253.00 294.50 520.00 622.50 808.00 791.50 699.00 449.00 121.00 138.98 a 4791.98
1980 36.50 151.50 172.50 376.00 473.00 551.50 724.00 714.50 601.50 441.00 225.00 180.00 4647.00
1981 160.50 127.50 278.00 306.50 473.50 539.50 721.02 b 869.50 627.50 339.50 208.50 85.00 4736.52
1982 60.00 92.50 138.50 220.00 441.50 702.50 709.50 758.00 611.50 373.00 89.50 60.50 4257.00
1983 136.50 177.00 255.00 294.50 565.50 596.50 710.00 786.00 515.50 345.50 216.50 28.00 4626.50
1984 143.50 138.00 246.50 279.50 413.50 557.00 733.50 782.50 604.00 305.50 121.50 18.50 4343.50
1985 20.50 46.50 102.50 286.00 477.00 615.00 a 908.30 a 778.74 b 520.50 342.55 a 68.00 20.67 a 4186.26
1986 147.00 117.50 276.50 235.00 484.50 202.00 u 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1260.50
Period of Record Statistics
MEAN 72.69 110.62 168.68 264.33 463.00 600.48 744.06 754.68 589.60 374.05 160.23 79.42 4379.62
S.D. 40.38 50.91 62.16 48.63 57.70 67.21 61.77 61.00 63.95 48.60 49.53 45.51 223.94
SKEW 0.63 0.49 0.29 -0.02 0.04 0.53 0.26 0.14 0.15 0.29 -0.22 0.26 0.02
MAX 160.50 230.50 278.00 376.00 565.50 746.00 908.30 869.50 709.00 453.24 250.50 180.00 4791.98
MIN 13.50 36.50 80.00 173.00 366.50 472.50 596.00 653.50 481.50 305.50 68.00 9.00 3960.50
NO YRS 25 25 25 25 25 24 25 25 25 25 24 25 21