KENT, WASHINGTON

Monthly Total Growing Degree Days

(454169)

Base Temperature = 50 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1912 0.00 z 0.00 z 0.00 z 19.50 209.50 317.00 402.50 380.50 227.50 38.00 6.00 0.00 1600.50
1913 0.00 6.00 0.00 55.00 132.50 325.00 401.00 453.50 241.00 47.00 0.50 0.00 1661.50
1914 5.50 1.50 25.50 78.00 214.50 305.50 417.50 391.00 217.50 132.50 12.50 0.00 1801.50
1915 0.00 0.00 39.78 a 80.00 178.00 310.50 456.00 460.50 248.50 111.00 0.50 0.00 1884.78
1916 0.00 5.50 18.50 34.00 105.50 253.50 343.58 a 400.50 225.00 12.50 0.50 0.00 1399.08
1917 0.57 d 0.00 0.00 a 0.00 z 0.00 z 114.50 o 367.50 394.00 235.00 112.00 37.50 23.25 c 1169.82
1918 6.50 0.00 16.00 37.00 76.00 311.50 154.50 q 0.00 z 285.58 d 112.00 0.50 3.00 848.08
1919 0.00 0.00 9.30 a 36.50 114.50 149.50 g 360.50 373.50 246.50 46.50 18.50 0.00 1205.80
1920 4.50 0.00 g 3.50 16.00 64.00 265.50 470.00 432.00 253.50 57.50 9.00 0.00 1575.50
1921 0.50 26.50 4.50 25.50 145.50 329.00 340.50 396.50 170.69 a 106.95 a 8.50 4.00 1558.64
1922 0.00 0.00 3.00 25.50 217.50 369.00 373.00 398.00 176.00 21.00 0.00 0.00 1583.00
1923 0.00 z 0.00 z 5.34 b 0.00 z 7.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 12.34
1924 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 236.50 g 378.00 377.50 230.50 83.50 3.50 15.50 1088.50
1925 1.00 5.00 0.50 68.00 249.50 290.00 463.50 382.00 287.00 41.00 11.00 17.00 1815.50
1926 0.00 7.00 57.50 185.00 213.50 386.00 486.50 459.50 218.50 140.00 20.50 2.50 2176.50
1927 5.00 0.00 0.00 57.00 105.00 383.00 498.50 508.50 274.50 100.00 9.50 3.00 1944.00
1928 4.50 0.00 35.00 40.50 252.00 315.00 498.00 410.00 230.00 90.50 12.00 0.00 1887.50
1929 0.00 0.00 3.50 24.50 142.00 283.00 416.00 437.00 245.50 142.50 0.00 0.00 1694.00
1930 0.00 14.00 20.50 109.00 134.50 265.00 403.00 448.50 249.50 54.50 11.00 0.00 1709.50
1931 11.50 0.00 24.00 79.29 b 280.00 305.00 449.00 419.00 266.90 a 76.50 10.00 0.00 1921.18
1932 0.00 20.50 10.50 80.00 145.50 367.50 378.00 432.50 280.34 a 135.50 30.50 4.00 1884.84
1933 0.00 0.00 1.00 48.00 92.50 285.00 387.50 484.50 194.50 107.50 14.50 2.50 1617.50
1934 0.00 6.50 55.50 172.50 235.00 319.00 398.00 436.50 246.00 132.00 23.00 1.00 2025.00
1935 20.50 1.00 4.00 37.00 158.50 321.00 428.50 427.00 328.00 107.00 0.00 0.00 1832.50
1936 0.00 0.00 4.00 108.00 228.00 349.50 433.00 472.75 a 224.50 131.00 4.00 1.00 1955.75
1937 0.00 0.00 29.50 19.00 169.00 344.50 447.00 405.50 272.00 152.50 9.50 1.00 1849.50
1938 0.00 0.00 5.50 72.00 162.00 310.00 458.00 355.35 d 351.50 86.50 9.00 5.00 1814.85
1939 2.50 0.00 21.50 77.50 181.50 331.07 b 473.00 456.00 215.50 88.41 d 4.50 1.72 d 1853.20
1940 19.00 7.00 30.50 120.00 253.50 334.50 447.50 436.07 a 355.00 222.00 4.00 8.50 2237.57
1941 1.50 22.50 37.50 109.00 204.50 323.50 558.50 492.50 291.50 131.75 c 21.00 5.00 2198.75
1942 0.00 0.00 7.00 39.50 163.00 301.00 510.50 444.50 f 308.00 172.50 0.00 z 0.00 z 1501.50
1943 0.00 2.00 3.00 96.00 119.50 284.00 443.50 0.00 z 316.00 116.77 a 2.00 0.00 a 1382.77
1944 0.50 0.00 4.50 41.50 157.50 293.28 a 471.00 403.53 b 329.00 141.50 3.50 1.00 1846.81
1945 5.50 1.50 0.00 28.50 265.00 0.00 z 0.00 z 0.00 z 0.00 z 51.50 k 0.00 z 1.00 301.50
1946 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
1947 0.00 z 6.22 a 0.00 z 73.93 b 207.70 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 9.50 0.00 z 297.35
1948 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 5.00 0.00 5.00
1949 0.00 a 0.00 i 8.50 57.50 233.00 269.50 0.00 z 402.50 0.00 z 0.00 z 0.00 z 2.50 n 971.00
1950 0.00 i 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 0.00 z 20.00 g 0.00
1951 0.00 10.00 1.50 95.00 c 231.00 415.00 537.50 451.50 337.22 c 110.00 1.55 a 0.00 2190.27
1952 0.00 0.00 4.50 70.50 228.00 285.00 509.00 515.00 324.83 a 152.33 b 5.00 4.00 2098.16
1953 6.95 b 0.50 21.00 54.50 182.38 a 266.00 471.50 465.00 302.68 b 87.50 7.00 0.00 1865.01
1954 0.00 0.50 0.00 29.50 190.00 259.50 379.00 365.50 291.00 89.50 39.00 4.50 1648.00
1955 0.00 0.00 3.50 8.50 109.50 320.50 377.50 400.00 265.50 67.00 12.41 a 0.00 1564.41
1956 0.00 0.00 3.50 70.00 269.70 a 261.50 520.00 463.00 274.00 81.50 1.55 a 0.50 1945.25
1957 0.00 a 2.00 4.13 a 90.00 317.50 378.50 421.60 a 404.50 373.00 67.50 0.00 1.11 c 2059.84
1958 0.00 10.50 6.31 d 53.50 349.78 a 461.00 609.50 500.50 278.50 116.50 7.50 17.22 d 2410.82
1959 0.00 b 2.07 a 1.50 50.17 a 134.00 330.50 459.50 364.00 193.50 59.50 4.14 a 0.00 1598.88
1960 1.00 0.00 a 9.09 b 60.50 104.50 281.50 481.00 393.00 218.28 a 100.00 3.50 0.00 1652.36
1961 4.50 2.50 9.62 b 28.50 168.43 a 407.07 a 511.00 532.00 214.66 a 70.50 0.00 a 0.00 1948.78
1962 0.52 a 6.74 a 1.55 a 70.34 a 76.00 281.00 429.50 401.85 d 300.54 b 95.00 9.31 a 3.62 a 1675.97
1963 0.00 a 19.50 5.17 a 29.50 154.50 f 289.50 391.00 401.45 a 382.50 116.50 f 3.50 4.00 1526.12
1964 0.00 0.00 11.50 12.93 a 134.00 305.50 438.50 411.00 242.50 103.50 2.00 1.50 1662.93
1965 0.00 4.00 1.00 76.00 127.21 b 329.00 517.00 491.50 225.50 165.00 33.00 1.00 1970.21
1966 0.00 7.50 25.00 42.50 167.50 297.00 419.50 449.50 339.50 82.00 1.03 a 3.00 1834.03
1967 1.50 0.00 3.50 5.50 188.00 431.50 484.00 593.50 405.50 139.50 10.50 5.00 2268.00
1968 6.50 13.50 22.00 47.50 209.50 313.00 528.03 a 412.00 280.00 66.50 4.00 0.00 1902.53
1969 0.00 0.00 20.00 33.00 262.47 a 469.00 442.00 366.83 a 293.28 a 66.00 12.50 0.00 1965.08
1970 1.00 4.50 7.23 a 11.00 168.43 a 396.50 468.00 424.00 208.45 a 69.00 20.50 0.00 1778.61
1971 4.00 2.50 3.10 a 54.00 186.00 c 226.50 489.00 531.43 c 241.00 119.50 5.00 0.00 1862.03
1972 0.00 6.00 42.00 23.00 253.50 308.00 453.50 442.00 209.50 52.00 10.00 3.50 1803.00
1973 4.50 1.50 0.00 29.50 200.50 318.62 a 433.50 334.00 281.00 61.00 5.50 0.50 1670.12
1974 3.00 0.00 13.95 a 37.50 123.00 324.00 397.00 464.50 365.00 0.00 z 0.00 z 5.50 1733.45
1975 3.00 0.00 1.00 4.00 173.08 a 292.50 481.07 d 382.50 311.50 97.50 23.50 15.00 1784.66
1976 3.00 0.00 3.10 a 67.50 198.29 b 41.00 v 426.25 a 391.63 a 337.76 a 87.32 a 17.68 b 3.50 1536.03
1977 1.50 3.50 1.00 95.00 115.50 338.00 407.00 568.52 c 211.00 0.00 z 0.50 0.00 z 1741.52
1978 1.50 9.50 16.50 0.00 z 156.03 a 406.61 b 488.50 463.00 252.50 121.00 0.00 z 0.00 1915.14
1979 0.00 b 0.50 0.00 z 57.78 c 142.50 h 318.00 498.50 466.03 a 0.00 z 0.00 z 9.00 3.50 1353.31
1980 0.00 f 14.50 0.00 z 110.17 a 93.50 k 266.38 a 422.50 388.03 b 199.50 k 95.67 b 36.00 24.50 1357.76
1981 9.50 7.50 26.00 69.44 c 138.47 a 246.67 c 405.77 c 524.42 a 297.50 0.00 z 6.50 0.00 z 1731.76
1982 0.00 9.00 1.00 37.00 175.00 409.00 382.00 448.00 329.48 a 99.50 1.00 0.00 1890.98
1983 3.50 14.50 5.50 50.00 241.50 315.00 442.00 479.00 258.50 60.00 22.00 0.00 1891.50
1984 11.50 0.50 21.00 36.00 144.50 304.00 479.00 447.00 307.76 a 75.00 2.00 0.00 1828.26
1985 0.00 0.00 2.00 58.50 185.00 329.00 537.50 438.00 204.50 83.00 7.50 0.00 1845.00
1986 0.50 28.50 40.00 40.00 188.00 384.00 373.50 361.50 j 255.00 116.50 7.00 0.00 1433.00
1987 1.50 7.00 23.00 125.00 210.50 364.00 416.95 a 464.50 336.00 116.00 30.00 0.00 2094.45
1988 0.00 0.00 6.00 70.50 186.00 284.50 468.50 441.00 301.00 177.00 15.50 2.00 1952.00
1989 0.50 0.00 2.00 122.00 183.50 383.00 397.66 b 323.50 f 333.33 c 98.54 c 21.00 1.00 k 1541.52
1990 0.00 1.50 20.00 116.00 202.02 a 362.00 592.00 562.50 425.50 75.50 0.00 z 0.00 2357.02
1991 1.50 16.00 2.50 52.00 158.50 294.00 544.00 546.50 360.00 154.50 25.00 1.00 2155.50
1992 14.00 21.00 24.00 162.50 329.00 0.00 z 0.00 z 538.00 308.50 135.00 5.50 1.55 a 1539.05
1993 0.50 0.00 17.50 54.50 372.00 c 349.50 386.00 501.00 353.50 175.00 3.50 3.10 a 2216.10
1994 2.00 2.50 43.00 107.50 281.50 329.50 576.50 529.50 431.50 86.50 0.00 5.50 2395.50
1995 7.23 a 13.50 44.50 88.00 313.50 389.50 568.50 434.00 433.00 122.00 54.50 3.50 2471.73
1996 3.50 6.00 31.50 120.00 150.00 339.31 a 585.00 540.00 259.50 116.50 6.50 0.00 2157.81
1997 0.00 0.50 15.00 73.00 326.50 354.50 517.00 604.50 397.50 100.00 25.50 0.00 2414.00
1998 7.50 4.00 41.50 78.00 221.50 379.50 601.00 559.00 403.50 128.00 11.00 2.50 2437.00
1999 1.07 b 0.00 a 20.31 b 79.04 d 133.96 c 312.86 b 454.67 a 511.50 d 359.42 d 70.04 d 24.31 a 0.00 b 1967.18
2000 0.00 a 1.00 1.55 a 100.50 190.50 374.50 491.50 446.92 a 339.50 104.48 d 2.00 0.00 c 2052.45
2001 1.03 a 0.00 b 17.57 a 58.33 c 229.50 298.50 449.50 500.17 e 315.00 b 74.18 c 21.21 a 0.00 a 1964.99
2002 8.50 4.50 1.50 44.50 178.50 396.72 a 517.00 513.10 b 310.50 97.00 28.50 4.50 2104.83
2003 11.00 0.50 33.00 67.00 253.96 e 431.00 591.50 533.00 397.00 199.50 2.50 0.00 2519.96
2004 0.50 1.00 53.00 157.50 280.00 439.50 624.00 579.00 303.00 152.50 12.50 3.50 2606.00
2005 28.50 3.00 63.50 119.00 315.50 345.00 526.00 557.50 272.68 b 175.00 0.00 9.50 2415.18
2006 1.00 0.00 19.00 86.00 242.00 418.50 575.50 500.00 375.00 111.00 27.50 0.00 2355.50
2007 0.50 4.00 64.58 a 86.50 228.00 347.00 569.50 492.00 323.00 93.00 15.50 8.00 2231.58
2008 0.00 5.00 5.00 35.00 236.50 292.50 493.00 522.50 319.50 98.00 52.50 4.50 2064.00
2009 1.50 3.00 6.00 61.50 0.00 z 440.00 636.02 a 515.50 395.50 97.00 10.00 1.50 2167.52
2010 8.00 5.50 40.50 66.00 138.00 284.50 495.50 509.00 364.00 134.00 41.50 3.50 2090.00
2011 5.00 0.00 6.72 a 17.50 128.50 299.42 d 467.58 a 516.48 c 422.50 95.58 a 4.00 0.50 1963.79
2012 0.00 0.52 a 2.07 a 112.22 c 185.00 282.00 476.76 b 570.06 d 403.93 b 129.00 26.50 2.00 2190.05
2013 0.00 0.00 23.50 7.50 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 23.50
Period of Record Statistics
MEAN 2.78 4.36 15.48 65.09 191.17 331.14 466.21 458.75 294.54 103.61 12.06 2.81 1966.95
S.D. 4.87 6.39 16.28 37.83 67.14 52.33 68.18 62.41 64.53 38.55 12.09 4.83 260.37
SKEW 2.82 1.90 1.22 0.85 0.27 0.63 0.44 0.30 0.29 0.37 1.41 2.77 0.39
MAX 28.50 28.50 64.58 185.00 372.00 469.00 636.02 604.50 433.00 222.00 54.50 24.50 2606.00
MIN 0.00 0.00 0.00 4.00 7.00 226.50 340.50 334.00 170.69 12.50 0.00 0.00 1399.08
NO YRS 94 95 94 94 92 90 92 90 92 89 92 92 73