ELECTRON HEADWORKS, WASHINGTON

Monthly Total Growing Degree Days

(452493)

Base Temperature = 40 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 198005
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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 548.50 542.50 554.00 372.00 214.00 16.50 0.00 2247.50
1949 4.00 30.00 50.00 169.50 395.50 411.00 551.80 a 575.50 483.00 131.75 a 209.50 16.00 3027.55
1950 2.50 21.00 27.50 106.00 253.50 435.50 586.00 621.50 419.50 185.50 67.50 86.00 2812.00
1951 4.50 25.00 17.50 175.50 320.00 502.00 637.50 544.50 487.00 213.00 48.00 2.00 2976.50
1952 12.00 25.00 27.00 192.00 352.00 393.50 623.50 628.50 504.50 357.00 39.50 14.00 3168.50
1953 60.00 15.50 37.50 124.50 265.00 337.24 a 581.00 577.00 454.66 a 259.50 103.00 12.00 2826.90
1954 10.50 27.00 7.50 69.00 307.00 339.00 494.00 484.50 396.50 205.50 143.00 20.00 2503.50
1955 0.00 1.00 9.00 35.00 196.50 432.50 488.50 510.00 398.00 235.00 50.50 26.50 2382.50
1956 12.50 0.00 25.00 173.50 407.50 416.50 658.50 605.00 406.00 176.50 50.00 42.50 2973.50
1957 0.00 17.50 55.50 176.90 a 412.00 485.00 549.00 523.50 551.90 a 222.50 32.50 27.00 3053.29
1958 45.50 122.50 44.00 140.50 504.00 605.50 776.50 679.50 438.00 295.50 73.00 107.00 3831.50
1959 46.50 17.00 26.50 160.00 273.50 476.00 649.00 525.50 383.00 243.50 64.50 27.00 2892.00
1960 30.00 26.50 88.50 167.50 243.50 453.00 685.10 a 553.00 430.50 267.00 41.00 24.50 3010.10
1961 70.50 57.50 87.50 132.50 314.00 572.00 675.50 726.00 342.50 177.00 25.34 a 16.00 3196.34
1962 36.00 50.50 21.18 a 183.00 214.50 440.00 587.00 575.05 a 468.00 231.00 77.00 46.50 d 2929.73
1963 15.00 117.00 48.50 112.50 347.50 410.00 535.50 587.00 558.50 267.00 51.00 43.50 3093.00
1964 5.00 2.00 42.50 53.50 265.00 410.50 568.50 531.28 b 371.50 248.50 27.00 13.50 2538.78
1965 7.50 25.00 58.50 164.00 231.50 452.50 664.00 634.00 359.00 307.50 112.50 21.50 3037.50
1966 15.00 14.00 80.00 144.00 320.00 416.00 547.50 572.00 487.50 191.00 75.00 60.00 2922.00
1967 19.00 8.00 23.50 42.50 315.50 573.50 629.50 747.00 546.00 234.00 55.00 26.50 3220.00
1968 59.50 82.50 93.00 107.50 338.50 485.50 689.00 547.00 434.50 190.50 68.50 16.50 3112.50
1969 12.00 5.19 a 84.50 142.00 417.00 614.00 600.00 559.50 468.00 151.50 103.00 31.00 3187.69
1970 32.50 43.00 54.50 63.00 340.00 581.50 680.50 631.00 370.50 178.50 62.00 9.50 3046.50
1971 21.18 a 27.50 11.00 122.00 340.50 362.50 656.50 696.50 349.66 a 196.33 a 34.50 1.50 2819.67
1972 1.50 20.50 105.50 79.00 408.50 462.00 633.50 650.50 317.00 131.50 41.00 31.50 2882.00
1973 26.50 24.00 22.50 135.00 393.50 486.50 660.00 529.50 455.00 169.50 31.00 38.50 2971.50
1974 19.00 2.50 60.50 125.50 249.00 505.38 d 593.00 630.00 529.50 197.00 60.00 28.50 2999.88
1975 13.00 12.50 21.50 53.50 300.50 414.50 724.00 533.00 456.50 168.00 68.00 48.00 2813.00
1976 20.00 2.00 22.00 120.00 331.00 400.50 617.00 533.50 491.50 185.00 59.00 20.50 2802.00
1977 17.50 48.50 17.50 222.00 226.50 524.50 574.50 747.00 368.50 149.50 29.50 31.00 2956.50
1978 37.00 58.00 131.00 124.00 283.00 546.50 659.00 619.00 378.00 245.00 32.50 0.00 3113.00
1979 0.00 17.50 98.00 145.00 386.00 471.50 640.00 594.00 505.50 308.00 43.00 62.50 3271.00
1980 2.50 54.50 46.50 293.50 307.23 c 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 704.23
Period of Record Statistics
MEAN 20.57 31.26 48.29 132.93 320.60 467.64 617.42 594.53 436.93 216.64 62.29 29.72 2979.69
S.D. 19.10 30.39 32.33 55.15 70.56 74.31 65.11 68.87 66.30 53.74 38.69 23.83 258.01
SKEW 1.06 1.63 0.78 0.40 0.38 0.28 0.06 0.74 0.14 0.61 2.04 1.43 0.51
MAX 70.50 122.50 131.00 293.50 504.00 614.00 776.50 747.00 558.50 357.00 209.50 107.00 3831.50
MIN 0.00 0.00 7.50 35.00 196.50 337.24 488.50 484.50 317.00 131.50 16.50 0.00 2382.50
NO YRS 32 32 32 32 32 32 32 32 32 32 32 32 31