KETCHIKAN, ALASKA

Monthly Total Growing Degree Days

(504590)

Base Temperature = 50 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 193.00 1.00 g 38.79 a 0.00 231.79
1950 0.00 0.00 0.00 0.00 2.21 c 261.50 211.00 278.00 167.50 22.50 0.00 0.00 f 942.71
1951 0.00 0.00 0.00 1.00 22.00 193.50 331.50 316.50 173.50 25.00 1.50 0.00 1064.50
1952 0.00 h 0.00 a 0.00 1.00 42.50 96.00 294.00 276.50 109.50 56.50 1.00 0.00 877.00
1953 0.00 0.00 0.00 10.00 94.00 193.00 305.50 281.00 131.11 c 32.72 d 3.50 0.00 1050.83
1954 0.00 0.00 0.00 0.00 53.00 h 86.00 164.00 342.50 194.50 11.50 7.00 0.00 805.50
1955 0.00 0.00 0.00 e 0.00 11.62 c 118.00 211.00 153.50 94.00 4.50 0.00 0.00 592.62
1956 0.00 0.00 0.00 33.50 78.00 89.00 274.00 242.00 111.50 1.66 c 0.00 0.00 829.66
1957 0.00 0.00 0.00 0.00 84.50 136.50 214.50 327.00 248.00 12.00 0.00 0.00 1022.50
1958 2.50 0.00 0.00 27.50 139.50 365.50 428.00 259.50 104.00 14.00 0.00 0.00 1340.50
1959 0.00 0.00 0.00 3.50 60.50 173.50 276.00 224.00 116.00 21.50 3.00 0.00 878.00
1960 0.00 0.00 z 0.00 b 19.00 44.00 52.00 201.00 252.00 102.50 26.00 0.50 1.00 698.00
1961 0.00 0.00 0.00 10.00 50.00 144.00 342.50 349.50 130.50 16.50 0.00 0.00 1043.00
1962 0.00 0.00 0.00 0.00 34.00 95.00 284.00 270.50 127.50 8.00 18.00 4.50 841.50
1963 0.00 10.00 0.00 0.00 80.00 82.50 273.00 364.00 200.50 32.00 0.00 0.00 1042.00
1964 0.00 d 0.00 0.00 0.00 43.50 164.00 176.50 151.00 94.50 19.50 0.00 0.00 649.00
1965 0.00 0.00 4.50 4.50 27.00 72.50 277.00 297.00 198.50 22.00 0.00 0.00 903.00
1966 0.00 0.00 0.00 0.00 15.00 118.00 337.00 223.50 101.50 9.50 1.50 0.00 806.00
1967 0.00 0.00 0.00 4.00 31.00 267.50 225.00 336.50 168.00 21.00 0.00 0.00 1053.00
1968 0.00 2.00 1.00 0.00 117.00 137.50 284.00 247.00 85.00 0.50 0.00 0.00 874.00
1969 0.00 0.00 0.00 0.00 113.50 300.50 169.00 146.00 132.50 29.00 6.50 0.00 897.00
1970 0.00 0.00 0.00 0.00 14.00 137.00 174.00 200.00 38.00 9.00 6.00 0.00 578.00
1971 0.00 0.00 0.00 0.00 1.00 42.50 308.00 243.50 75.00 0.00 0.00 0.00 a 670.00
1972 0.00 0.00 0.00 0.00 43.50 87.50 262.50 234.00 106.50 0.00 0.00 0.00 734.00
1973 0.00 0.00 0.00 2.00 26.50 45.00 122.00 140.50 77.50 0.00 0.00 0.00 413.50
1974 0.00 0.00 0.00 1.50 17.50 37.50 169.00 302.50 229.00 9.50 0.00 0.00 766.50
1975 0.00 0.00 0.00 1.00 36.50 103.00 226.00 208.50 128.00 16.50 0.00 0.00 719.50
1976 0.00 0.00 0.00 16.55 a 1.00 114.00 197.00 236.00 118.50 6.00 0.00 0.00 689.05
1977 0.00 1.00 0.00 16.00 39.00 128.00 248.50 420.00 102.00 2.50 0.00 0.00 957.00
1978 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 18.00 0.00 0.00 18.00
1979 0.00 a 0.00 a 0.00 7.50 8.50 57.00 i 285.00 358.05 a 161.90 a 29.45 a 1.00 f 0.00 a 850.40
1980 0.00 b 0.00 0.00 c 0.00 69.48 b 228.10 a 0.00 z 256.78 a 0.00 z 38.75 a 3.00 0.00 a 596.12
1981 4.50 0.00 z 0.00 k 0.50 u 0.00 z 96.43 b 314.13 a 319.30 a 112.78 c 4.50 2.59 a 0.00 c 854.23
1982 0.00 b 0.00 z 0.00 z 0.00 b 0.00 z 0.00 z 0.00 z 0.00 z 125.56 c 6.72 a 0.00 z 0.00 z 132.27
1983 0.00 0.00 0.00 a 32.00 40.30 a 138.33 c 226.41 c 204.08 a 67.50 2.50 0.00 z 0.00 z 711.13
1984 0.00 0.00 b 0.00 2.00 7.48 b 82.50 181.50 224.50 81.00 18.50 0.00 0.00 597.48
1985 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 269.00 199.50 0.00 z 0.00 z 0.00 z 0.00 z 468.50
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 110.00 40.09 b 0.00 a 0.00 150.09
1987 0.00 b 0.00 a 0.00 z 3.50 28.93 a 106.00 299.00 315.50 110.00 20.50 1.00 0.00 a 884.43
1988 0.00 z 0.00 z 0.00 z 0.00 29.50 105.00 182.50 254.00 81.50 29.50 0.00 0.00 682.00
1989 0.00 b 0.00 0.00 18.50 51.00 179.50 272.50 284.50 149.50 11.50 0.00 0.00 967.00
1990 0.00 0.00 0.00 a 5.50 62.00 145.00 316.50 308.00 113.00 1.50 0.00 0.00 951.50
1991 0.00 0.00 0.00 0.00 26.00 143.50 194.00 241.00 99.50 7.50 0.00 0.00 711.50
1992 0.00 5.00 0.00 0.00 31.50 175.00 261.50 256.00 27.50 1.00 0.00 0.00 757.50
1993 4.00 3.00 0.00 0.50 145.00 169.50 312.50 344.50 166.50 28.50 0.00 0.00 1174.00
1994 0.00 0.00 1.00 10.00 52.50 184.50 309.50 383.50 141.00 15.00 0.00 0.00 1097.00
1995 0.00 0.00 0.00 42.50 83.50 179.00 296.00 193.00 222.50 11.00 0.00 0.00 1027.50
1996 0.00 0.00 0.00 0.00 22.00 103.00 225.00 218.00 68.50 7.75 a 1.00 0.00 v 645.25
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 0.00 1.00 3.00 82.76 a 202.50 220.00 54.00 1.00 0.00 0.00 564.26
2000 0.00 0.00 0.00 0.00 9.00 136.00 245.50 228.00 90.00 10.00 0.00 0.00 718.50
2001 0.00 0.00 0.00 0.00 4.00 93.50 197.00 260.50 93.00 3.50 0.00 0.00 651.50
2002 0.00 0.00 0.00 2.00 23.50 122.00 192.50 211.00 76.00 17.00 2.00 0.00 646.00
2003 0.00 0.00 0.00 0.50 16.50 124.00 220.00 219.50 107.50 11.50 0.00 0.00 699.50
2004 0.00 0.00 0.00 2.00 77.50 247.00 322.50 339.00 64.00 12.50 0.00 0.00 1064.50
2005 0.00 0.00 0.00 27.50 100.50 205.00 206.00 282.50 93.00 1.50 0.00 0.00 916.00
2006 0.00 0.00 0.00 0.00 40.00 159.00 253.00 180.50 82.00 8.00 0.00 0.00 722.50
2007 0.00 0.00 0.00 0.00 21.50 127.50 230.00 259.00 93.50 0.00 0.00 0.00 731.50
2008 0.00 0.00 0.00 0.00 66.00 58.00 157.00 184.50 g 132.50 14.50 0.50 0.00 428.50
2009 0.00 0.00 0.00 0.00 29.50 183.00 355.50 281.50 94.00 1.00 0.00 0.00 944.50
2010 0.00 0.00 0.00 2.00 61.00 103.50 282.00 303.50 118.50 11.50 4.00 0.00 886.00
2011 0.00 0.00 0.00 0.00 49.00 150.50 212.00 208.00 120.00 1.00 0.00 0.00 740.50
2012 0.00 0.00 0.00 0.00 6.50 92.00 233.00 232.00 103.50 26.00 0.00 0.00 693.00
2013 0.00 0.00 0.00 0.00 40.00 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
Period of Record Statistics
MEAN 0.19 0.39 0.12 5.31 44.26 138.56 249.81 261.54 118.95 14.01 1.75 0.10 843.46
S.D. 0.85 1.57 0.63 9.86 35.05 65.15 60.11 61.56 46.06 12.02 5.69 0.61 187.94
SKEW 4.32 4.94 6.36 2.17 1.05 1.14 0.32 0.25 0.80 1.05 5.32 6.89 0.25
MAX 4.50 10.00 4.50 42.50 145.00 365.50 428.00 420.00 248.00 56.50 38.79 4.50 1340.50
MIN 0.00 0.00 0.00 0.00 1.00 37.50 122.00 140.50 27.50 0.00 0.00 0.00 413.50
NO YRS 57 54 55 58 55 56 57 57 59 60 58 57 44