KETCHIKAN, ALASKA

Monthly Total Growing Degree Days

(504590)

Base Temperature = 40 F

File last updated on Jun 7, 2013
*** Note *** Provisional Data *** After Year/Month 201305
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
1949 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 493.00 163.00 g 219.83 a 3.50 716.33
1950 0.00 6.00 41.00 78.00 218.66 c 554.50 521.00 588.00 467.00 196.00 40.00 39.50 f 2710.16
1951 6.50 2.00 6.00 96.50 279.50 493.50 641.50 626.50 464.50 178.00 64.50 20.00 2879.00
1952 0.00 h 3.62 a 7.00 59.50 284.00 375.50 604.00 586.50 405.50 342.00 95.00 34.00 2796.62
1953 11.50 13.50 20.50 148.00 377.50 492.50 615.50 591.00 422.78 c 269.24 d 70.50 32.00 3064.52
1954 8.50 40.00 20.00 17.50 254.50 h 379.50 474.00 652.50 494.00 233.50 205.00 43.50 2568.00
1955 30.00 12.00 19.08 e 69.50 205.38 c 386.00 521.00 463.50 388.00 163.50 26.00 5.50 2289.45
1956 15.50 4.00 32.00 155.00 340.00 382.00 584.00 552.00 387.50 137.84 c 42.50 47.50 2679.84
1957 0.00 4.00 31.50 93.50 359.00 436.50 524.50 637.00 548.00 239.00 97.50 15.50 2986.00
1958 88.00 54.50 42.50 210.50 395.50 665.50 738.00 569.50 394.50 222.00 38.50 84.50 3503.50
1959 5.50 11.00 15.50 127.00 322.50 468.00 586.00 534.00 416.00 250.50 79.00 60.00 2875.00
1960 13.50 0.00 z 29.93 b 169.00 311.50 333.00 510.50 561.00 401.00 269.50 78.00 88.00 2764.93
1961 37.50 25.50 72.00 140.50 341.00 443.50 652.50 659.50 427.00 200.00 32.50 12.00 3043.50
1962 44.00 12.00 12.00 94.00 250.50 382.00 594.00 580.50 427.00 255.50 147.00 86.00 2884.50
1963 21.00 119.00 19.50 132.50 340.50 376.50 583.00 674.00 500.50 240.00 36.50 61.00 3104.00
1964 0.57 d 37.00 7.50 49.00 221.50 463.50 486.50 460.50 379.00 190.50 58.50 10.00 2364.07
1965 36.50 7.00 62.50 115.50 195.00 356.00 587.00 607.00 496.50 247.50 53.00 28.50 2792.00
1966 14.00 18.00 59.00 120.00 208.50 416.50 647.00 533.50 401.50 167.00 48.50 47.50 2681.00
1967 11.00 13.50 4.00 106.00 284.00 567.50 535.00 646.50 468.00 239.00 69.00 8.50 2952.00
1968 11.50 57.50 79.50 49.00 391.50 435.00 594.00 557.00 378.50 203.50 86.00 1.50 2844.50
1969 0.00 1.50 22.50 113.50 369.50 600.50 479.00 456.00 432.50 265.50 114.50 80.00 2935.00
1970 22.00 81.00 67.50 80.00 204.00 434.50 484.00 510.00 314.00 189.00 100.50 6.50 2493.00
1971 2.00 7.00 0.50 41.00 147.50 319.50 615.50 553.50 358.50 119.50 23.50 0.00 a 2188.00
1972 0.00 0.00 22.50 9.00 249.00 381.50 572.50 544.00 347.00 171.50 59.00 5.50 2361.50
1973 2.00 11.00 30.00 148.50 228.00 305.00 429.50 448.50 364.50 94.00 0.00 4.00 2065.00
1974 1.00 2.50 10.00 156.50 213.00 311.50 477.50 612.50 528.00 190.00 51.50 49.00 2603.00
1975 9.00 7.50 0.50 100.00 264.50 380.00 536.00 518.50 427.00 170.50 6.00 23.50 2443.00
1976 13.50 1.50 3.50 106.55 a 197.50 406.50 507.00 546.00 416.00 169.00 74.00 13.50 2454.55
1977 12.00 69.00 9.00 122.50 311.00 427.00 558.50 730.00 397.50 170.50 4.00 0.00 2811.00
1978 3.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 237.50 48.00 3.00 292.00
1979 0.00 a 0.00 a 46.50 128.50 233.00 261.50 i 595.00 668.05 a 461.38 a 279.00 a 61.00 f 27.38 a 2438.81
1980 2.67 b 21.50 10.52 c 104.50 317.48 b 528.10 a 0.00 z 565.23 a 0.00 z 275.38 a 124.00 23.77 a 1973.16
1981 146.00 0.00 z 41.50 k 36.00 u 0.00 z 388.39 b 624.13 a 629.30 a 398.33 c 186.00 102.41 a 18.27 c 2492.84
1982 1.07 b 0.00 z 0.00 z 23.04 b 0.00 z 0.00 z 0.00 z 0.00 z 422.22 c 172.57 a 0.00 z 0.00 z 618.89
1983 27.00 56.00 57.35 a 162.00 301.73 a 435.56 c 534.20 c 514.08 a 329.50 182.00 0.00 z 0.00 z 2599.42
1984 32.50 17.19 b 82.00 97.50 223.95 b 369.50 491.50 533.50 372.50 206.50 19.50 3.50 2449.63
1985 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 579.00 509.50 0.00 z 0.00 z 0.00 z 0.00 z 1088.50
1986 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 392.50 294.50 b 46.03 a 38.50 771.53
1987 24.59 b 44.59 a 0.00 z 106.50 280.55 a 400.50 609.00 625.50 406.00 235.00 100.50 28.42 a 2861.15
1988 0.00 z 0.00 z 0.00 z 116.00 280.00 399.50 492.50 564.00 368.00 258.00 84.00 18.50 2580.50
1989 6.95 b 4.50 7.50 140.50 300.00 479.50 582.50 594.50 449.50 177.50 66.50 93.00 2902.45
1990 8.50 2.50 54.25 a 158.00 336.50 445.00 626.50 618.00 411.00 112.50 15.50 8.00 2796.25
1991 5.50 41.00 3.00 97.50 267.00 431.00 504.00 551.00 390.50 139.50 83.50 40.00 2553.50
1992 45.50 59.00 52.00 107.00 274.50 470.50 571.50 565.50 270.00 133.00 69.50 5.00 2623.00
1993 23.50 78.50 28.00 140.00 417.00 469.50 622.50 654.50 461.50 283.50 64.50 55.00 3298.00
1994 56.00 3.00 78.50 208.00 325.00 484.50 619.50 693.50 429.50 224.00 10.00 9.50 3141.00
1995 29.50 36.50 52.00 201.00 372.00 479.00 606.00 503.00 521.50 215.00 55.50 48.50 3119.50
1996 6.50 30.50 37.00 120.50 241.00 388.50 535.00 528.00 318.00 167.92 a 59.00 1.00 v 2431.92
1997 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1998 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1999 0.00 z 0.00 z 5.00 64.50 150.00 370.86 a 512.50 530.00 310.50 184.50 51.00 31.50 2210.36
2000 7.50 7.00 31.00 71.50 226.50 435.00 555.50 538.00 382.50 176.50 75.50 29.00 2535.50
2001 51.00 5.50 13.00 65.00 165.00 387.00 507.00 570.50 392.00 157.00 53.00 15.00 2381.00
2002 33.00 0.50 0.00 44.50 198.50 415.50 502.50 511.00 364.50 213.00 121.50 51.00 2455.50
2003 44.00 0.00 24.00 119.00 209.00 419.50 530.00 529.50 391.00 221.50 15.00 35.00 2537.50
2004 29.00 19.00 28.00 132.00 363.50 545.50 632.50 649.00 348.50 168.50 36.00 41.50 2993.00
2005 41.00 10.50 49.50 167.00 406.00 503.50 516.00 592.50 373.00 159.00 67.50 58.50 2944.00
2006 11.50 4.00 2.50 41.50 250.50 459.00 563.00 480.50 375.50 175.50 1.50 19.50 2384.50
2007 11.50 10.00 12.50 81.50 226.00 427.50 540.00 569.00 368.00 142.00 10.50 1.00 2399.50
2008 0.50 2.50 1.00 23.00 282.50 346.50 466.50 424.50 g 429.00 175.00 83.00 11.50 1821.00
2009 2.00 0.00 0.00 85.50 281.00 475.50 665.50 591.50 361.50 167.00 25.50 6.50 2661.50
2010 82.00 53.50 35.00 118.00 314.00 399.00 592.00 613.50 416.50 212.00 65.50 8.00 2909.00
2011 17.00 12.00 19.50 44.50 277.00 450.50 522.00 518.00 413.00 182.00 8.50 15.00 2479.00
2012 11.00 18.00 9.50 114.00 186.50 382.00 543.00 542.00 399.00 164.50 43.50 0.50 2413.50
2013 17.00 18.50 8.00 67.00 245.00 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 110.50
Period of Record Statistics
MEAN 20.94 21.79 27.17 104.43 276.65 431.41 559.64 571.07 407.99 201.02 62.52 28.33 2710.77
S.D. 25.79 25.72 23.32 46.93 68.20 70.67 60.23 62.07 55.36 49.25 43.99 25.30 313.60
SKEW 2.60 1.67 0.80 0.08 0.17 0.87 0.31 0.23 0.30 0.39 1.33 0.97 0.23
MAX 146.00 119.00 82.00 210.50 417.00 665.50 738.00 730.00 548.00 342.00 219.83 93.00 3503.50
MIN 0.00 0.00 0.00 9.00 147.50 305.00 429.50 448.50 270.00 94.00 0.00 0.00 2065.00
NO YRS 57 54 55 58 55 56 57 57 59 60 58 57 44