CASTLE ROCK, COLORADO

Monthly Total Growing Degree Days

(051401)

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
1893 9.82 a 8.50 58.26 b 172.00 432.45 a 767.00 917.50 831.50 630.50 254.00 37.50 20.00 4139.03
1894 18.00 0.52 a 127.50 260.69 a 519.50 688.00 883.00 839.00 602.00 351.50 33.00 q 0.00 z 4289.71
1895 0.00 z 0.00 z 0.00 z 0.00 z 452.60 a 677.00 739.00 749.50 586.00 222.50 5.00 11.00 3442.60
1896 17.00 4.50 62.50 187.50 408.50 710.17 a 848.50 795.50 522.00 188.50 19.50 0.00 3764.17
1897 0.00 b 2.00 47.02 a 94.50 351.50 n 773.50 907.50 803.00 747.00 309.50 93.00 i 22.00 k 3684.02
1898 0.00 z 0.00 z 0.00 j 224.00 449.50 702.50 954.00 860.00 522.00 184.00 59.50 0.50 3956.00
1899 0.00 0.00 37.64 c 245.00 480.50 710.50 864.00 820.50 590.50 248.00 82.50 2.50 4081.64
1900 3.00 1.00 75.00 85.50 503.50 730.50 824.00 803.00 566.00 344.50 83.50 10.50 4030.00
1901 12.00 1.50 51.67 a 197.50 499.00 711.50 996.00 880.50 556.00 380.00 80.50 21.70 a 4387.87
1902 13.00 28.50 26.00 273.46 d 544.50 761.50 851.00 885.50 589.00 303.80 a 110.50 22.50 4409.26
1903 13.00 0.00 60.45 a 196.00 363.50 554.50 886.00 891.25 a 549.00 303.50 95.50 15.00 3927.70
1904 14.50 111.00 104.00 195.00 395.00 564.31 a 786.00 843.00 0.00 z 0.00 z 0.00 z 0.00 z 3012.81
1905 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 630.50 189.50 69.83 a 1.00 890.83
1906 13.95 a 27.00 29.85 d 222.00 478.00 639.50 777.00 883.00 571.50 205.00 79.14 a 45.47 a 3971.41
1907 14.50 16.50 142.00 102.00 195.00 518.57 b 527.00 g 821.50 509.50 177.70 c 1.03 a 7.50 2505.80
1908 0.00 22.50 105.50 196.50 361.50 604.50 792.00 744.00 603.00 218.50 42.00 2.00 3692.00
1909 55.50 7.50 0.00 z 133.00 295.00 625.50 843.50 803.00 461.00 0.00 z 162.50 0.00 3386.50
1910 27.00 13.48 a 166.50 0.00 z 381.50 732.50 932.50 818.00 692.50 0.00 z 42.00 q 4.00 3767.98
1911 67.00 15.50 110.50 209.00 509.00 780.00 796.00 798.50 696.50 251.00 i 0.00 z 0.00 3982.00
1912 16.02 a 0.00 17.50 136.50 414.50 552.50 799.50 767.80 c 342.00 227.50 34.00 0.00 3307.82
1913 1.50 2.00 56.50 224.50 485.00 0.00 z 829.50 880.40 a 379.44 c 189.50 65.00 0.00 3113.34
1914 3.00 0.00 29.00 136.00 438.00 703.50 818.00 789.50 618.50 275.50 92.59 a 0.00 3903.59
1915 0.00 10.50 10.50 241.00 309.00 522.50 771.00 664.50 530.50 297.50 119.50 25.00 f 3476.50
1916 22.00 15.50 167.50 145.86 a 381.00 661.50 902.50 733.00 532.50 230.50 70.50 21.50 3883.86
1917 1.50 24.50 29.50 120.50 202.00 594.00 845.50 717.50 587.50 230.00 87.00 60.81 e 3500.31
1918 16.50 21.78 a 0.00 z 0.00 z 31.00 z 220.50 v 79.00 z 353.50 r 0.00 z 0.00 z 0.00 z 0.00 z 38.28
1919 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
1920 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 657.50 842.00 700.50 537.00 292.50 38.00 12.50 3080.00
1921 30.50 30.00 130.50 133.50 486.50 675.00 866.00 805.00 633.00 365.28 a 97.00 52.18 a 4304.47
1922 6.00 24.00 57.00 137.00 413.50 776.00 879.00 910.50 625.00 227.00 18.00 19.00 4092.00
1923 44.00 0.00 a 27.50 182.00 412.00 670.50 880.50 766.00 503.50 153.50 26.00 12.50 3678.00
1924 0.00 39.00 3.50 161.50 221.50 670.50 1053.00 995.50 795.50 290.50 95.50 5.00 4331.00
1925 3.10 a 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 3.10
1926 0.00 z 0.00 z 0.00 z 182.88 d 354.50 512.00 593.50 727.00 564.00 342.00 72.50 32.00 3380.38
1927 44.50 31.50 59.50 217.50 467.50 644.00 829.00 715.50 367.00 g 292.50 143.00 0.00 3444.50
1928 27.00 5.00 80.00 168.10 a 438.00 558.50 808.00 772.00 556.50 256.50 55.00 12.50 3737.10
1929 2.00 0.00 58.00 156.50 372.00 676.00 879.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2144.00
1930 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
1931 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
1932 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
1933 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
1934 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
1935 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
1936 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
1937 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
1938 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
1939 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
1940 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
1941 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
1942 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
1943 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
1944 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
1945 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
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 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
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 0.00 z 0.00 z 0.00
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1950 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
1951 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
1952 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
1953 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
1954 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
1955 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
1956 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
1957 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
1958 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
1959 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
1960 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
1961 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
1962 0.00 z 0.00 z 0.00 z 241.50 m 463.00 624.00 850.50 855.50 593.50 381.50 98.00 22.50 3888.50
1963 2.00 53.50 100.50 244.50 563.00 736.00 984.50 821.00 695.00 474.00 84.50 5.00 4763.50
1964 8.50 0.00 17.00 179.50 463.00 633.50 982.50 822.00 575.00 305.50 75.50 42.50 4104.50
1965 17.50 14.50 21.00 216.50 398.50 630.00 892.50 765.50 443.50 354.50 120.00 31.00 3905.00
1966 5.50 0.00 110.50 179.50 524.50 702.00 1017.00 803.50 621.00 292.50 127.00 11.00 4394.00
1967 43.50 32.50 170.50 234.00 364.50 633.50 897.50 770.00 587.00 366.50 94.50 0.00 4194.00
1968 5.00 4.50 69.50 100.00 384.50 787.00 897.00 811.50 554.50 358.50 40.50 12.50 4025.00
1969 18.50 14.00 42.00 298.50 523.00 577.00 976.00 966.00 643.00 120.50 17.50 13.50 4209.50
1970 23.50 17.50 20.50 116.50 520.00 694.50 906.00 931.50 538.00 158.50 70.00 28.50 4025.00
1971 22.00 t 14.00 80.00 166.00 324.00 745.50 831.50 847.50 465.50 273.00 68.50 46.50 3862.00
1972 20.50 36.50 148.50 209.00 399.00 703.50 839.50 790.50 535.50 320.00 0.00 8.50 4011.00
1973 2.50 0.50 16.00 124.00 335.00 656.50 846.00 842.50 482.50 316.50 128.50 30.50 3781.00
1974 9.50 4.50 134.50 176.00 523.00 685.50 882.50 778.00 433.50 330.00 33.00 3.50 3993.50
1975 1.50 9.00 59.50 180.54 b 347.00 620.00 914.00 844.00 528.00 375.00 81.50 33.50 3993.54
1976 12.50 46.00 49.60 a 210.00 a 446.50 687.50 947.50 849.00 0.00 z 221.00 67.50 12.50 3549.60
1977 1.00 23.50 68.50 214.66 a 556.93 b 819.31 a 971.00 848.22 b 574.00 f 366.12 b 90.52 a 42.00 l 3959.76
1978 0.00 b 5.25 d 75.50 j 165.50 m 451.05 a 760.34 a 746.50 h 842.17 d 686.90 a 351.16 b 102.86 b 13.43 a 3213.15
1979 0.00 40.00 63.50 237.41 a 412.50 682.24 a 946.02 a 829.80 c 708.00 418.00 21.35 d 14.43 b 4373.25
1980 13.00 i 25.00 j 15.00 f 188.40 e 433.40 e 845.40 e 698.50 i 890.98 b 218.00 u 44.00 q 135.52 a 35.50 q 2493.70
1981 5.17 d 49.26 a 49.00 408.21 b 390.94 d 807.93 a 948.71 b 824.71 b 673.45 a 292.50 122.68 b 29.00 4601.56
1982 8.00 38.50 106.50 201.50 405.50 604.00 926.50 908.00 631.00 230.00 35.50 19.00 4114.00
1983 7.00 7.00 40.50 119.46 b 334.00 625.00 930.00 925.50 731.50 364.00 122.07 a 0.00 d 4206.03
1984 0.00 2.00 15.50 77.00 546.50 669.50 921.00 836.50 511.00 183.50 69.31 a 44.29 c 3876.10
1985 0.00 e 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 158.00 o 55.34 a 14.98 a 70.33
1986 102.00 114.59 a 196.50 250.50 410.23 a 784.50 898.50 860.50 554.00 268.00 71.50 1.00 4511.83
1987 12.00 29.68 c 57.00 295.50 469.50 736.00 901.00 788.50 551.00 325.50 116.50 41.00 4323.18
1988 21.00 19.50 93.00 229.50 461.00 775.00 887.50 896.00 525.50 363.50 122.50 24.50 4418.50
1989 35.50 27.00 199.00 276.00 454.50 647.59 a 939.00 490.00 m 545.00 298.00 104.42 d 28.50 3554.51
1990 46.00 32.50 65.21 b 212.50 400.13 d 856.61 b 832.50 806.00 658.50 304.83 a 162.00 32.55 a 4409.33
1991 6.00 32.00 90.00 163.50 516.31 b 758.40 e 870.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2436.21
1992 0.00 z 0.00 z 77.50 309.00 504.50 610.50 803.50 762.50 608.79 a 366.50 22.50 11.00 4076.29
1993 6.00 8.00 86.50 175.50 440.50 646.00 868.50 787.50 495.00 247.50 30.00 24.50 3815.50
1994 7.50 29.50 127.50 230.50 534.50 828.50 901.50 929.00 660.50 313.50 100.50 37.50 4700.50
1995 33.50 66.00 129.50 126.00 275.00 602.00 823.00 952.50 574.50 264.00 159.00 59.00 4064.00
1996 35.50 85.50 76.50 231.50 518.50 750.50 914.50 879.00 529.00 339.50 110.50 57.50 4528.00
1997 48.50 27.50 134.00 129.50 421.00 711.50 925.00 815.50 653.00 342.55 a 40.50 2.00 4250.55
1998 0.00 6.50 79.00 117.00 495.50 602.00 941.00 825.50 723.00 309.50 147.50 57.50 4304.00
1999 5.37 e 53.41 a 153.50 138.62 a 138.50 s 480.50 g 942.92 a 849.50 496.00 327.00 243.00 22.22 a 3231.53
2000 31.50 61.62 a 93.00 277.00 536.82 a 764.48 a 950.15 a 935.00 621.72 a 299.50 10.34 a 3.00 4584.14
2001 15.50 b 7.00 50.00 255.00 456.50 779.50 1000.78 a 0.00 z 663.62 a 329.12 a 145.50 10.50 3713.02
2002 30.00 25.00 60.50 302.00 423.50 832.00 997.00 863.50 628.50 198.00 51.00 13.50 4424.50
2003 46.00 26.00 107.00 260.50 459.00 610.00 1036.50 936.50 520.00 426.00 57.50 31.00 4516.00
2004 8.00 23.00 177.50 221.00 514.00 630.00 807.50 729.50 589.50 294.50 80.00 32.00 4106.50
2005 48.50 17.00 52.00 170.00 453.00 703.00 1015.00 820.50 691.00 328.00 160.00 41.00 4499.00
2006 72.00 24.50 114.50 315.00 557.50 861.50 968.00 887.00 474.50 287.50 136.50 18.00 4716.50
2007 5.50 30.50 191.00 185.00 482.50 754.50 1000.50 959.00 673.00 403.00 182.00 25.00 4891.50
2008 23.00 14.50 72.00 177.00 424.00 721.00 1021.00 873.50 564.00 323.00 159.50 33.00 4405.50
2009 46.00 63.50 160.00 184.50 487.00 652.00 860.00 0.00 z 0.00 z 154.50 136.50 9.50 2753.50
2010 8.50 0.00 73.00 220.50 409.00 784.50 963.50 953.00 740.50 394.00 121.50 36.50 4704.50
2011 10.00 50.00 146.00 247.76 a 339.34 c 769.66 a 1008.00 1002.85 a 617.00 343.50 95.17 a 11.00 4640.28
2012 49.17 b 2.00 262.50 335.69 a 545.50 909.64 b 1041.08 a 946.07 d 668.33 c 308.50 183.00 51.00 5302.50
2013 36.00 3.00 79.80 d 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 118.80
Period of Record Statistics
MEAN 18.68 22.51 85.76 198.13 434.52 693.04 895.24 836.89 585.42 293.02 86.57 20.03 4211.21
S.D. 19.90 23.74 53.31 62.98 81.10 85.79 79.59 70.89 85.52 72.29 49.10 16.89 366.67
SKEW 1.58 1.79 0.83 0.50 -0.78 0.08 -0.48 0.14 -0.12 -0.22 0.41 0.70 0.21
MAX 102.00 114.59 262.50 408.21 563.00 909.64 1053.00 1002.85 795.50 474.00 243.00 60.81 5302.50
MIN 0.00 0.00 3.50 77.00 195.00 512.00 593.50 664.50 342.00 120.50 0.00 0.00 3307.82
NO YRS 79 78 76 78 80 81 80 78 76 77 78 77 56