SILVERTON, COLORADO

Monthly Total Growing Degree Days

(057656)

Base Temperature = 40 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
1899 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
1900 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
1901 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
1902 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
1903 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
1904 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 418.50 432.50 233.00 37.50 0.00 0.00 1121.50
1905 0.00 0.00 0.00 1.50 82.00 304.50 424.50 475.50 272.00 50.00 0.00 0.00 a 1610.00
1906 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 375.00 346.50 165.50 0.00 z 5.36 b 0.00 892.36
1907 0.00 0.00 4.50 0.58 d 7.50 120.50 446.73 c 322.00 133.50 24.80 a 0.00 c 0.00 1060.11
1908 0.00 0.00 0.00 8.00 28.70 d 183.00 432.00 280.50 148.50 12.00 0.00 0.00 1092.70
1909 0.00 0.00 0.00 0.00 32.00 290.00 514.08 a 464.00 192.50 36.00 0.50 0.00 1529.08
1910 0.00 c 0.00 0.00 20.50 122.50 307.00 297.00 l 397.50 184.00 40.50 0.00 0.00 1072.00
1911 6.00 0.00 0.00 4.50 99.50 276.00 400.00 401.00 199.00 44.50 0.00 0.00 1430.50
1912 0.00 0.00 0.00 0.00 14.97 b 225.00 389.50 367.50 69.00 15.50 0.00 a 0.00 1081.47
1913 0.00 0.00 0.00 a 1.00 97.50 225.00 411.00 427.00 195.50 8.50 0.00 0.00 1365.50
1914 0.00 0.00 f 6.50 35.77 d 161.50 374.50 564.31 d 0.00 z 301.00 32.00 9.50 0.00 1485.08
1915 0.00 0.00 0.00 34.00 65.50 68.50 o 406.00 f 398.50 245.00 58.00 13.00 0.00 i 814.00
1916 1.19 e 0.00 0.50 8.50 75.50 232.00 408.50 344.50 140.50 21.00 0.00 a 0.00 1232.19
1917 0.00 0.00 0.00 0.00 n 25.50 260.00 497.00 362.50 233.00 62.00 2.00 0.00 1442.00
1918 0.00 0.00 0.00 3.00 88.00 436.00 454.00 431.00 252.00 130.50 0.00 0.00 1794.50
1919 0.00 0.00 0.00 38.50 130.00 288.50 534.00 456.50 290.00 13.50 0.00 0.00 1751.00
1920 0.00 0.00 0.00 4.00 152.00 i 351.00 492.50 420.50 195.00 f 83.00 0.00 0.00 1351.00
1921 0.00 0.00 0.00 2.00 60.50 268.00 465.00 422.50 232.50 95.50 0.00 0.00 1546.00
1922 0.00 0.00 0.00 2.00 141.50 378.50 597.00 529.50 329.00 157.00 0.00 0.00 2134.50
1923 0.00 0.00 0.00 0.00 111.50 208.00 i 536.00 422.50 181.00 28.50 3.00 0.00 a 1282.50
1924 0.00 0.00 0.00 25.50 31.50 391.50 447.50 327.05 a 134.00 0.00 0.00 0.00 1357.05
1925 0.00 0.00 6.00 48.50 201.00 345.52 a 483.00 414.00 321.50 22.50 0.00 0.00 1842.02
1926 0.00 0.00 0.00 15.00 a 105.40 a 0.00 z 0.00 z 0.00 z 288.00 81.50 0.00 0.00 489.90
1927 0.00 0.00 3.00 65.00 224.50 306.50 475.00 362.00 188.00 19.00 0.00 0.00 1643.00
1928 0.00 0.00 0.00 11.00 95.50 351.50 544.00 374.50 224.00 61.50 0.00 0.00 a 1662.00
1929 0.00 0.00 0.00 1.50 132.00 371.50 556.50 483.00 190.00 55.50 0.00 0.00 1790.00
1930 0.00 0.00 0.00 11.50 50.00 324.00 460.00 399.00 204.50 41.50 0.00 0.00 c 1490.50
1931 0.00 e 0.00 0.00 13.50 68.00 357.50 502.50 429.00 230.50 64.50 11.50 0.00 1677.00
1932 0.00 0.00 0.00 16.00 90.00 195.50 478.50 452.50 191.00 49.50 0.00 0.00 1473.00
1933 0.00 0.00 0.00 0.00 61.50 358.50 515.00 437.50 307.50 60.50 0.00 0.00 1740.50
1934 0.00 0.00 0.00 27.00 205.50 266.50 515.50 481.50 198.00 73.00 1.00 0.00 1768.00
1935 0.00 0.00 0.00 4.50 67.50 276.00 470.00 439.50 233.00 38.00 1.00 0.00 1529.50
1936 0.00 0.00 0.00 14.50 114.50 334.50 441.50 428.00 217.00 8.50 0.00 0.00 1558.50
1937 0.00 0.00 0.00 2.00 93.50 270.00 400.50 432.50 228.00 23.50 0.00 0.00 1450.00
1938 0.00 0.00 0.00 a 11.50 77.50 251.50 382.00 408.00 226.50 42.50 0.00 0.00 1399.50
1939 0.00 0.00 a 0.00 13.00 78.00 243.50 451.50 382.00 276.00 2.50 0.00 0.00 1446.50
1940 0.00 0.00 0.00 11.50 132.50 334.00 480.50 442.50 264.50 66.00 0.00 0.00 1731.50
1941 0.00 0.00 0.00 0.00 113.50 212.50 457.00 418.50 192.50 15.00 0.00 0.00 1409.00
1942 0.00 0.00 0.00 14.00 67.50 269.50 421.50 412.50 249.50 57.00 0.00 0.00 1491.50
1943 0.00 0.00 13.50 92.50 171.50 342.50 502.00 539.50 267.50 62.00 a 1.00 0.00 1992.00
1944 0.00 0.00 0.00 0.00 90.00 258.50 405.00 459.00 263.50 61.50 1.50 0.00 1539.00
1945 0.00 0.00 0.00 2.50 119.50 236.50 462.00 512.00 281.50 80.50 2.00 0.00 1696.50
1946 0.00 l 0.00 0.00 13.50 36.00 307.50 463.50 158.00 r 233.00 12.50 0.00 0.00 1066.00
1947 0.00 0.00 0.00 0.00 114.50 205.00 488.50 447.00 264.50 69.50 0.00 0.00 1589.00
1948 0.00 0.00 0.00 7.00 134.00 249.00 427.28 a 403.00 290.00 39.50 0.00 0.00 1549.78
1949 0.00 0.00 0.00 17.50 73.00 241.00 457.52 b 409.50 127.50 q 2.00 n 0.00 0.00 1198.52
1950 0.00 0.00 0.00 13.00 58.00 281.50 409.50 328.00 179.50 126.50 0.50 0.00 1396.50
1951 0.00 0.00 0.00 3.50 115.00 210.00 514.00 413.33 a 232.76 a 47.00 0.00 0.00 1535.59
1952 0.00 0.00 0.00 2.00 90.93 a 327.50 447.50 453.50 240.50 64.00 0.00 0.00 1625.93
1953 0.00 0.00 0.00 7.00 104.92 e 280.00 h 536.19 d 413.00 231.50 59.00 0.00 0.00 1351.61
1954 0.00 0.00 0.00 d 28.27 d 158.00 316.00 512.50 400.50 250.50 121.50 0.00 0.00 1787.27
1955 0.00 0.00 0.00 0.00 73.00 230.00 0.00 z 501.50 263.50 76.00 0.00 0.00 a 1144.00
1956 0.00 0.00 0.00 5.00 152.00 370.50 0.00 z 342.50 309.50 56.00 0.00 0.00 1235.50
1957 0.00 0.00 0.00 0.00 28.50 0.00 z 0.00 z 448.00 0.00 z 55.00 0.00 z 0.00 531.50
1958 0.00 0.00 0.00 0.00 123.45 c 281.50 h 452.50 505.50 118.00 u 0.00 z 0.00 z 0.00 1081.45
1959 0.00 0.00 0.00 49.50 133.00 415.50 538.00 452.00 272.00 17.50 0.00 0.00 1877.50
1960 0.00 0.00 0.00 9.50 143.50 345.00 501.00 485.50 351.50 61.50 0.00 0.00 1897.50
1961 0.00 0.00 0.00 1.50 139.50 382.00 458.00 496.50 166.50 41.00 0.00 0.00 1685.00
1962 0.00 0.00 0.00 76.00 86.50 279.50 421.50 398.50 245.50 99.00 5.00 0.00 1611.50
1963 0.00 0.00 0.00 23.00 186.00 296.00 544.00 482.00 363.00 141.50 0.00 0.00 2035.50
1964 0.00 0.00 0.00 2.50 145.50 294.00 537.50 421.50 266.00 92.50 0.00 0.00 a 1759.50
1965 0.00 0.00 0.00 35.50 97.00 251.00 485.00 410.00 180.50 112.12 a 0.00 0.00 1571.12
1966 0.00 0.00 0.00 6.00 177.50 333.00 551.50 470.00 273.00 55.50 0.00 0.00 1866.50
1967 0.00 b 0.00 2.00 6.50 131.00 237.00 539.00 431.00 300.50 81.50 0.00 0.00 1728.50
1968 0.00 0.00 0.00 0.00 97.50 351.00 464.50 380.50 205.50 109.50 0.00 0.00 1608.50
1969 0.00 0.00 0.00 20.00 185.50 242.50 525.00 536.00 293.50 22.00 0.00 0.00 1824.50
1970 0.00 0.00 0.00 0.00 185.50 299.00 473.50 476.50 201.00 24.00 3.00 0.00 1662.50
1971 1.00 0.00 5.00 9.50 80.00 321.50 494.00 496.50 191.50 61.00 0.00 0.00 1660.00
1972 0.00 0.00 0.00 16.50 110.00 357.50 482.50 445.00 241.50 126.00 0.00 0.00 1779.00
1973 0.00 0.00 0.00 0.00 105.00 310.50 486.50 474.50 216.00 75.00 2.50 0.00 1670.00
1974 0.00 0.00 0.00 6.00 178.00 365.50 463.50 380.00 228.50 74.00 0.00 0.00 1695.50
1975 0.00 0.00 1.00 0.00 35.00 246.50 449.00 359.00 213.00 42.50 7.00 0.00 1353.00
1976 0.00 0.00 0.00 0.50 110.50 243.50 486.50 344.50 213.00 29.50 0.00 0.00 p 1428.00
1977 0.00 a 0.00 0.00 9.31 a 75.50 333.00 400.00 366.00 0.00 z 0.00 z 0.00 z 0.00 z 1183.81
1978 0.00 z 0.00 d 0.00 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1979 0.00 z 0.00 a 0.00 a 1.50 f 94.00 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 c 0.00 0.00
1980 0.00 a 0.00 c 0.00 g 0.50 o 57.00 g 361.20 e 553.23 e 291.00 n 84.50 s 50.00 n 1.00 q 0.00 c 914.43
1981 0.00 z 0.00 i 0.00 h 22.00 j 72.00 m 280.50 i 0.00 z 60.00 y 225.00 41.85 a 9.50 0.00 276.35
1982 0.00 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 0.00 z 0.00
1983 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 0.50 0.00 0.50
1984 0.00 0.00 0.00 6.00 164.50 239.50 496.00 454.00 249.00 2.00 0.00 0.00 1611.00
1985 0.00 0.00 0.00 7.00 113.50 302.00 464.00 387.00 145.00 11.00 0.00 a 0.00 1429.50
1986 0.00 0.00 0.00 16.50 85.00 305.50 385.50 434.00 151.00 3.50 0.00 0.00 1381.00
1987 0.00 0.00 0.00 24.00 97.00 281.00 414.00 368.50 128.50 36.50 0.00 0.00 1349.50
1988 0.00 0.00 0.00 11.50 102.00 345.50 440.00 474.00 156.00 39.00 0.50 0.00 1568.50
1989 0.00 0.00 0.00 40.50 135.50 242.50 491.00 347.50 209.00 36.00 0.00 c 0.00 1502.00
1990 0.00 0.00 0.00 15.00 59.00 304.50 450.00 365.00 268.50 29.50 0.00 0.00 1491.50
1991 0.00 0.00 0.00 2.50 111.00 290.50 482.50 466.50 267.50 93.50 0.00 0.00 a 1714.00
1992 0.00 0.00 0.00 44.50 166.50 269.50 429.00 408.00 227.00 65.50 0.00 0.00 1610.00
1993 0.00 0.00 0.00 4.00 130.00 285.50 473.50 425.00 194.00 46.00 0.00 0.00 1558.00
1994 0.00 0.00 0.00 24.00 137.50 419.50 503.50 532.00 249.50 19.50 0.00 0.00 1885.50
1995 0.00 0.00 0.00 2.50 34.00 229.00 427.50 547.00 257.00 22.50 0.00 0.00 1519.50
1996 0.00 0.00 0.00 11.00 203.50 361.00 550.50 468.00 199.50 69.50 0.00 0.00 1863.00
1997 0.00 0.00 0.50 4.50 120.00 300.00 491.50 460.00 310.00 66.50 0.00 0.00 1753.00
1998 0.00 0.00 0.52 a 2.00 106.50 257.50 568.50 473.50 331.50 32.00 0.00 0.00 1772.02
1999 0.00 0.00 0.50 9.83 a 119.35 a 287.00 532.00 450.00 220.00 73.50 0.50 0.00 1692.68
2000 0.00 0.00 0.00 24.00 203.50 389.00 544.00 535.00 291.00 46.50 0.00 0.00 2033.00
2001 0.00 0.00 0.00 14.00 197.00 354.00 549.00 481.50 306.00 63.50 0.00 0.00 1965.00
2002 0.00 0.00 0.00 36.50 135.50 431.50 622.50 474.00 258.50 17.00 0.00 0.00 1975.50
2003 0.00 0.00 0.00 8.50 207.50 329.00 597.50 518.50 256.50 148.50 0.50 0.00 2066.50
2004 0.00 0.00 2.00 17.50 151.50 328.50 449.50 409.00 213.00 30.00 0.54 b 0.00 e 1601.54
2005 0.00 0.00 0.00 h 6.50 152.00 286.50 521.50 425.00 199.50 70.00 1.50 0.00 z 1662.50
2006 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 457.00 168.00 48.50 2.50 0.00 676.00
2007 0.00 0.00 0.00 20.00 136.50 351.00 563.00 543.50 272.00 48.50 0.00 0.00 1934.50
2008 0.00 0.00 z 0.00 0.50 88.50 312.00 517.00 480.50 210.00 55.00 6.50 0.00 1670.00
2009 0.00 0.00 0.00 5.00 192.50 258.50 499.00 420.50 244.50 21.00 0.00 0.00 1641.00
2010 0.00 0.00 1.00 3.50 100.50 369.50 552.00 471.50 308.50 93.50 2.50 0.00 1902.50
2011 0.00 a 0.00 0.00 5.50 77.00 333.00 577.00 511.50 274.50 40.50 0.00 0.00 1819.00
2012 0.00 0.00 a 2.50 44.00 0.00 z 0.00 z 575.50 506.00 259.50 69.50 0.00 0.00 1457.00
2013 0.00 0.00 0.00 y 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
Period of Record Statistics
MEAN 0.08 0.00 0.49 13.57 111.48 300.87 483.92 434.00 233.73 53.68 0.92 0.00 1638.56
S.D. 0.61 0.00 1.76 16.89 49.12 59.27 54.76 56.19 53.31 34.06 2.41 0.00 220.53
SKEW 9.12 0.00 5.11 2.20 0.16 -0.08 0.15 -0.13 -0.17 0.87 3.32 0.00 -0.23
MAX 6.00 0.00 13.50 92.50 224.50 436.00 622.50 547.00 363.00 157.00 13.00 0.00 2134.50
MIN 0.00 0.00 0.00 0.00 7.50 120.50 375.00 280.50 69.00 0.00 0.00 0.00 1060.11
NO YRS 102 103 100 99 98 94 97 100 99 100 103 103 81