SNOQUALMIE FALLS, WASHINGTON

Monthly Total Growing Degree Days

(457773)

Base Temperature = 40 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1931 123.50 84.00 193.00 313.00 539.00 583.00 736.00 685.50 549.00 339.93 b 96.00 23.50 4265.43
1932 27.50 64.50 175.50 297.00 409.50 598.50 629.00 696.00 528.50 342.00 192.50 62.50 4023.00
1933 26.50 16.50 111.00 242.50 347.00 505.00 643.50 759.00 467.50 333.50 123.50 104.50 3680.00
1934 102.00 168.00 284.00 429.50 513.50 559.50 649.00 700.50 446.50 347.00 218.00 50.00 4467.50
1935 117.00 119.00 27.00 f 177.00 353.00 514.50 656.50 626.50 529.50 0.00 z 33.00 v 96.00 3189.00
1936 68.00 13.00 81.00 347.00 521.50 607.50 697.00 752.00 479.50 369.50 92.00 68.00 4096.00
1937 0.00 72.50 0.00 z 81.00 u 440.00 613.50 723.00 678.50 565.50 404.00 163.50 85.00 3745.50
1938 37.50 100.50 124.50 315.00 446.50 597.50 760.50 642.00 623.50 392.00 108.50 101.50 4249.50
1939 70.00 5.50 135.00 335.50 446.00 501.50 708.50 725.00 514.00 315.50 241.00 161.50 4159.00
1940 94.50 107.50 219.50 339.00 545.00 593.50 704.50 715.00 610.00 439.00 92.00 127.00 4586.50
1941 122.97 a 139.00 301.22 a 341.50 450.00 562.50 812.00 704.50 454.50 348.00 166.50 80.50 4483.18
1942 106.50 63.00 163.50 344.50 454.50 548.00 833.50 824.00 555.50 387.00 96.00 81.50 4457.50
1943 17.00 114.50 106.00 354.00 369.50 539.00 744.50 705.00 605.50 341.00 212.00 55.00 4163.00
1944 69.00 33.50 104.50 301.61 b 422.00 568.50 736.00 710.00 597.50 435.50 132.00 73.00 4183.11
1945 90.00 65.50 88.00 178.00 482.00 522.50 747.00 703.50 467.50 330.00 87.00 79.50 3840.50
1946 42.50 72.00 107.50 224.50 527.00 518.50 743.50 709.50 550.00 203.00 69.00 55.50 3822.50
1947 31.50 99.00 188.50 336.50 537.00 551.50 677.50 649.50 497.50 354.50 91.00 88.50 4102.50
1948 24.50 28.50 86.00 172.50 394.50 631.55 a 665.50 660.50 469.00 303.00 46.50 5.00 3487.05
1949 2.50 58.59 a 119.00 287.00 487.50 494.00 623.50 670.00 548.28 a 217.00 303.00 51.00 3861.37
1950 10.50 74.50 86.50 190.00 317.50 571.00 680.50 717.50 507.00 279.00 119.00 160.50 3713.50
1951 27.00 55.50 75.50 273.50 438.00 591.50 725.50 620.50 545.50 311.50 130.50 11.00 3805.50
1952 33.00 58.50 79.50 287.50 430.00 474.00 710.00 709.50 568.00 372.50 106.50 47.50 3876.50
1953 142.50 48.50 118.50 224.00 426.00 466.00 682.50 714.50 554.50 355.00 221.00 100.50 4053.50
1954 20.00 81.50 56.00 171.50 414.00 471.00 591.00 622.14 b 502.50 309.50 269.48 a 76.50 3585.12
1955 23.00 17.00 32.50 126.00 313.50 528.00 589.00 621.50 463.50 295.00 79.00 33.07 a 3121.07
1956 54.50 2.07 a 83.00 280.86 a 522.00 505.50 747.00 708.00 515.50 253.50 102.00 95.00 3868.93
1957 6.00 13.39 e 131.50 284.00 533.50 590.50 651.00 b 629.50 638.50 297.00 100.50 117.50 3992.89
1958 130.50 241.00 127.00 279.00 607.00 731.50 930.00 818.50 560.00 425.50 133.00 176.00 5159.00
1959 92.50 53.00 127.50 273.00 401.00 589.00 744.50 682.00 509.00 346.50 144.00 76.00 4038.00
1960 53.00 97.50 159.50 297.50 387.00 573.00 792.00 697.00 530.50 389.50 127.50 71.00 4175.00
1961 184.00 129.50 204.00 235.00 437.00 658.50 802.50 832.00 511.00 308.00 99.00 59.00 4459.50
1962 79.50 159.00 118.50 335.50 345.00 544.50 691.50 700.50 586.50 371.00 201.50 127.00 4260.00
1963 25.50 237.50 117.00 228.00 479.50 525.00 644.50 707.00 654.00 417.50 164.00 99.50 4299.00
1964 46.50 49.50 128.50 186.50 373.50 536.50 694.50 653.50 472.00 406.50 74.50 41.00 3663.00
1965 46.00 67.50 157.50 306.00 368.00 562.00 784.00 748.00 470.00 421.50 262.00 81.50 4274.00
1966 69.50 79.00 186.00 284.50 427.00 571.00 683.50 730.00 621.00 344.00 154.50 136.50 4286.50
1967 75.50 78.00 68.72 a 137.00 405.50 659.00 724.50 842.00 661.00 406.50 198.00 83.50 4339.22
1968 76.00 190.00 222.00 180.50 437.00 539.00 754.50 649.00 514.50 319.00 151.50 36.50 4069.50
1969 12.00 47.50 129.00 235.50 491.00 667.00 675.00 643.00 554.50 298.00 175.00 90.50 4018.00
1970 57.50 173.00 145.00 151.50 397.50 618.00 708.50 674.00 472.50 320.00 182.00 19.00 3918.50
1971 87.00 76.50 53.00 208.50 407.50 437.00 719.00 791.00 468.00 294.50 130.50 16.00 3688.50
1972 27.50 73.50 190.50 155.50 475.00 540.50 717.50 748.00 452.50 237.50 156.00 93.00 3867.00
1973 68.00 145.50 119.50 233.50 461.00 525.50 702.00 591.00 553.00 305.00 57.50 103.00 3864.50
1974 74.00 51.50 113.50 223.00 332.00 545.00 638.00 722.00 643.00 325.50 151.00 109.50 3928.00
1975 41.00 50.50 53.00 111.00 401.00 468.00 708.50 608.00 554.00 289.00 140.50 111.00 3535.50
1976 83.50 54.00 63.50 233.00 386.50 442.50 649.50 613.50 545.50 283.00 0.00 z 112.50 3467.00
1977 41.00 183.50 87.00 322.00 351.50 601.00 664.50 829.00 470.50 303.50 137.50 75.50 4066.50
1978 110.50 140.00 219.00 256.00 378.00 662.50 734.50 692.50 505.50 347.00 62.50 16.50 4124.50
1979 2.50 43.50 198.00 240.54 b 463.00 559.50 762.00 710.42 a 622.00 381.00 115.50 134.50 4232.45
1980 13.00 122.50 111.50 342.50 416.50 496.00 690.50 621.00 523.50 375.00 187.00 165.50 4064.50
1981 206.50 127.50 217.00 264.00 405.50 496.50 683.50 805.50 564.50 248.50 194.50 64.50 4278.00
1982 43.50 87.50 102.50 203.00 411.50 644.50 664.00 711.50 0.00 z 336.50 72.50 54.00 3331.00
1983 131.50 171.00 238.00 275.00 493.50 539.00 659.00 714.00 442.00 250.00 190.50 16.50 4120.00
1984 137.00 118.50 214.00 215.00 361.00 506.00 697.50 679.50 466.00 213.50 72.50 7.00 3687.50
1985 21.00 34.50 68.00 242.00 422.50 551.00 849.00 700.50 448.50 271.00 42.50 12.50 3663.00
1986 167.50 117.00 249.00 199.50 459.50 638.00 635.50 828.50 480.50 380.00 136.00 65.00 4356.00
1987 57.50 171.50 216.48 a 336.50 479.00 635.00 717.00 754.00 600.00 381.00 237.00 47.00 4631.98
1988 42.00 132.50 134.00 274.50 451.50 544.50 718.00 728.50 548.50 421.00 137.50 91.50 4224.00
1989 49.50 14.00 126.00 341.00 429.00 641.50 679.00 716.50 596.00 324.00 174.50 88.50 4179.50
1990 83.50 51.00 173.50 309.50 400.00 562.50 810.00 790.50 612.50 280.00 179.50 40.50 4293.00
1991 56.50 182.50 87.50 225.50 384.50 471.50 743.00 793.50 584.50 334.50 170.50 125.00 4159.00
1992 129.00 209.00 245.50 357.00 535.50 666.00 736.00 769.50 505.50 380.00 131.00 21.00 4685.00
1993 45.50 110.50 184.00 272.50 567.00 547.50 588.50 713.50 569.50 392.00 54.00 73.00 4117.50
1994 108.00 33.00 207.50 295.50 471.50 522.50 767.00 756.00 631.50 326.50 41.00 78.50 4238.50
1995 164.50 121.00 179.50 253.50 499.50 583.00 769.50 634.00 639.50 0.00 z 234.00 111.50 4189.50
1996 0.00 z 113.00 140.50 313.00 339.50 0.00 z 783.00 735.50 490.50 330.00 127.00 25.00 3397.00
1997 80.00 77.00 137.00 249.50 534.50 546.00 699.00 794.00 635.50 331.50 250.50 110.50 4445.00
1998 101.50 152.00 199.50 244.00 437.00 583.50 818.50 763.00 634.00 367.50 172.50 67.00 4540.00
1999 71.50 71.00 115.50 202.50 318.00 509.00 647.00 745.55 a 534.00 294.50 213.00 81.12 a 3802.67
2000 21.50 98.50 121.00 293.00 421.08 a 570.50 686.00 686.65 a 551.50 325.00 66.50 54.50 3895.73
2001 89.50 49.00 137.50 226.50 411.27 a 499.50 673.50 728.00 564.00 285.20 a 205.00 76.47 a 3945.43
2002 87.50 52.50 71.50 191.50 366.50 595.86 a 723.00 716.50 549.00 274.00 200.00 70.00 3897.86
2003 149.50 53.00 179.50 240.50 412.00 632.50 0.00 z 791.50 588.00 421.50 0.00 z 73.07 c 3541.07
2004 90.50 101.50 205.50 351.50 474.50 660.50 896.50 898.50 617.00 431.50 134.50 58.50 4920.50
2005 133.50 59.00 279.00 d 278.50 525.50 532.00 768.50 817.00 531.00 457.00 103.50 93.50 4578.00
2006 105.50 73.00 156.00 282.50 450.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1067.00
Period of Record Statistics
MEAN 71.45 90.78 145.06 260.87 436.43 561.32 714.78 716.46 543.13 337.60 144.48 76.40 4101.96
S.D. 46.93 54.75 60.45 64.05 64.59 60.06 65.79 64.46 59.62 57.45 60.05 39.08 344.42
SKEW 0.62 0.71 0.47 -0.11 0.26 0.29 0.70 0.37 0.14 -0.11 0.35 0.27 0.21
MAX 206.50 241.00 301.22 429.50 607.00 731.50 930.00 898.50 661.00 457.00 303.00 176.00 5159.00
MIN 0.00 2.07 32.50 111.00 313.50 437.00 588.50 591.00 442.00 203.00 41.00 5.00 3121.07
NO YRS 75 76 74 75 76 74 74 75 74 73 72 75 68