CASTLE ROCK, COLORADO

Monthly Total Heating Degree Days

(051401)

Base Temperature = 65 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 1025.58 a 1029.50 910.22 b 672.50 349.27 a 71.00 0.00 21.00 131.50 543.50 924.50 960.00 6638.57
1894 1184.50 1182.74 a 814.00 518.79 a 270.00 95.50 9.00 21.50 169.50 431.00 296.50 q 0.00 z 4696.53
1895 0.00 z 0.00 z 0.00 z 0.00 z 334.80 a 105.00 90.00 45.00 173.50 562.50 1027.50 1160.50 3498.80
1896 999.00 972.00 1001.50 631.00 372.00 77.07 a 17.00 58.00 232.00 606.00 964.00 1032.00 6961.57
1897 1341.02 b 1095.50 930.52 a 707.50 81.50 n 51.00 13.50 21.50 47.50 510.50 553.00 i 730.50 k 4718.53
1898 0.00 z 0.00 z 760.00 j 566.50 334.00 96.00 0.50 14.00 235.00 637.00 986.00 1401.50 4270.50
1899 1233.50 1354.50 1006.39 c 545.50 298.00 97.00 17.50 19.50 186.00 532.00 722.00 1243.00 7254.89
1900 1093.00 1036.50 787.50 765.00 275.00 78.00 34.00 24.00 203.50 442.50 783.00 1039.50 6561.50
1901 1049.50 1056.50 919.15 a 639.00 276.00 89.00 0.00 5.00 205.50 395.00 716.50 1069.50 a 6420.65
1902 1165.00 857.50 921.50 503.08 d 230.50 54.50 30.00 5.50 181.50 480.50 a 761.00 1048.00 6238.58
1903 1074.50 1286.00 936.72 a 613.00 414.50 224.00 34.50 7.75 a 246.50 485.50 774.50 1051.50 7148.97
1904 1197.00 802.00 766.00 588.50 381.00 185.69 a 40.00 25.00 0.00 z 0.00 z 0.00 z 0.00 z 3985.19
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 144.00 665.50 774.31 a 1215.00 2798.81
1906 1076.22 a 913.00 1159.63 d 547.50 298.50 137.00 77.00 13.00 193.00 651.00 907.76 a 987.87 a 6961.47
1907 1122.00 851.00 731.00 757.00 652.00 232.50 b 80.50 g 27.00 248.50 600.62 c 1105.86 a 1139.50 7466.99
1908 1067.50 956.50 754.50 584.50 440.50 164.00 35.50 77.50 173.00 643.50 964.00 1147.50 7008.50
1909 931.00 994.50 0.00 z 776.00 487.50 139.50 11.50 30.00 289.50 0.00 z 721.50 1502.00 5883.00
1910 1078.00 1081.63 a 641.50 0.00 z 407.00 69.50 7.00 49.00 86.00 0.00 z 309.00 q 1033.50 4453.13
1911 906.00 1031.50 713.00 576.00 289.50 39.00 33.50 59.00 84.50 338.50 i 0.00 z 1312.50 5044.50
1912 1157.33 a 1093.00 1175.50 674.00 394.00 200.50 37.50 39.30 c 410.50 559.50 822.00 1251.50 7814.64
1913 1198.00 1233.00 949.00 584.50 296.50 0.00 z 21.50 5.17 a 380.00 c 658.50 774.00 1462.50 7562.67
1914 1081.50 1142.00 919.50 673.00 342.50 73.50 26.00 41.00 138.00 505.00 715.34 a 1348.50 7005.84
1915 1297.00 935.00 1054.00 512.50 484.50 227.50 55.50 114.00 220.50 477.50 791.50 875.00 f 6169.50
1916 1237.50 904.50 689.00 685.34 a 430.00 118.00 7.00 75.00 225.00 589.50 905.50 1272.50 7138.84
1917 1231.50 929.50 1087.00 729.50 600.50 184.50 14.50 71.00 167.50 598.50 721.50 952.65 e 7288.15
1918 1372.50 915.19 a 0.00 z 0.00 z 44.00 z 12.00 v 0.50 z 7.50 r 0.00 z 0.00 z 0.00 z 0.00 z 2287.69
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 109.50 18.00 96.50 220.00 528.50 897.00 1085.50 2955.00
1921 1037.00 927.00 722.00 723.50 289.00 108.00 20.00 26.00 120.00 412.82 a 726.00 907.78 a 6019.10
1922 1250.50 997.50 950.00 686.50 361.50 70.50 13.50 1.50 128.50 553.00 908.00 945.00 6866.00
1923 869.00 1076.96 a 1040.50 584.00 365.50 95.50 1.50 37.00 249.00 744.50 845.00 1199.50 7107.96
1924 1284.50 881.00 1211.00 667.00 580.00 141.00 3.00 0.50 62.50 486.00 763.50 1394.00 7474.00
1925 1248.78 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 1248.78
1926 0.00 z 0.00 z 0.00 z 595.38 d 425.50 238.50 185.00 75.50 203.50 467.50 776.00 1140.50 4107.38
1927 943.50 858.00 940.00 593.50 317.50 147.50 24.50 78.00 215.50 g 482.50 664.50 1312.00 6361.50
1928 1035.50 1045.50 851.00 685.34 a 340.00 201.50 40.00 49.50 201.50 541.50 892.00 1196.00 7079.34
1929 1220.00 1219.00 888.00 638.50 409.00 108.00 25.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4508.00
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 184.50 m 312.00 149.00 14.00 30.00 163.50 393.50 721.00 971.00 2754.00
1963 1412.50 830.00 900.00 508.50 222.00 78.00 0.00 29.00 73.50 301.00 739.50 1168.50 6262.50
1964 1175.00 1227.00 1087.50 625.50 321.50 141.50 0.00 38.50 195.50 473.00 843.50 1019.50 7148.00
1965 953.50 1037.50 1185.50 548.50 378.00 134.50 7.00 46.00 328.50 420.50 675.50 1003.50 6718.50
1966 1235.50 1148.50 781.00 621.50 264.00 80.50 0.00 33.50 136.50 507.00 690.00 1043.50 6541.50
1967 1015.00 889.00 685.00 528.00 426.00 127.50 2.50 54.50 164.50 422.00 792.00 1235.50 6341.50
1968 1072.00 955.50 843.50 745.00 390.50 55.00 22.50 37.50 199.00 430.50 934.00 1118.50 6803.50
1969 966.50 887.00 1115.50 459.00 265.00 185.50 0.00 0.00 116.50 792.50 907.50 1082.50 6777.50
1970 1147.00 799.00 1026.50 711.00 267.00 126.50 1.50 0.00 222.00 670.50 847.00 956.50 6774.50
1971 281.50 t 1004.50 896.00 636.00 461.00 81.00 41.50 15.00 327.50 554.00 830.50 1039.50 5886.50
1972 1090.00 929.00 722.00 564.50 377.00 67.50 30.00 50.00 215.50 486.50 1108.50 1267.00 6907.50
1973 1286.00 1038.50 928.50 715.50 450.50 134.00 38.50 19.00 272.00 471.00 773.00 1086.00 7212.50
1974 1307.50 998.50 746.00 639.00 255.00 127.50 5.50 43.50 324.50 455.00 888.50 1223.00 7013.50
1975 1169.00 1046.50 918.50 680.89 b 430.00 156.00 3.00 24.00 227.50 434.00 965.00 961.50 7015.89
1976 1138.50 807.50 910.37 a 543.10 a 333.50 109.00 1.50 15.00 0.00 z 622.50 863.00 1046.50 6390.47
1977 1180.50 867.00 918.00 585.52 a 219.14 b 8.79 a 0.00 28.33 b 62.00 f 413.69 b 795.52 a 543.00 l 5016.48
1978 1187.09 b 956.67 d 486.50 j 270.00 m 349.27 a 106.03 a 4.50 h 35.02 d 116.90 a 429.19 b 814.82 b 1209.00 a 5203.98
1979 1418.50 871.50 833.50 586.55 a 378.50 119.48 a 3.10 a 45.95 c 95.50 401.00 1007.88 d 1009.64 b 6771.10
1980 790.50 i 614.50 j 751.00 f 644.40 e 342.19 e 28.80 e 0.00 i 14.97 b 19.50 u 328.00 q 805.86 a 377.00 q 1836.22
1981 982.24 d 863.33 a 876.50 360.54 b 385.20 d 53.28 a 10.16 b 29.40 b 90.52 a 509.50 739.29 b 1010.50 5910.44
1982 1091.00 1003.00 764.00 588.00 372.00 165.00 5.00 1.50 141.50 563.00 867.00 1037.00 6598.00
1983 1048.00 889.50 948.50 793.93 b 450.00 170.50 0.50 0.00 88.00 411.00 856.03 a 1403.04 d 7059.00
1984 1201.50 978.00 981.50 760.50 239.00 112.50 1.50 6.00 261.50 716.00 760.86 a 990.89 c 7009.75
1985 1279.94 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 242.50 o 1001.90 a 1105.15 a 3386.99
1986 771.50 823.93 a 652.00 517.50 365.80 a 59.00 5.50 12.50 197.50 530.50 809.00 1100.50 5845.23
1987 1116.00 902.16 c 938.00 497.00 306.50 60.50 20.50 66.00 203.50 450.00 796.50 1126.50 6483.16
1988 1268.00 968.50 936.00 567.00 331.00 59.50 25.00 8.00 246.00 413.50 785.00 1064.50 6672.00
1989 987.50 1169.00 665.00 562.00 333.00 152.07 a 10.00 7.50 m 229.50 534.00 769.04 d 1175.00 6586.11
1990 931.00 933.50 863.72 b 563.00 383.48 d 25.18 b 39.00 34.00 135.00 506.85 a 691.00 1235.35 a 6341.08
1991 1128.50 770.50 776.50 621.50 267.24 b 57.60 e 23.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3644.84
1992 0.00 z 0.00 z 792.00 450.00 277.00 154.50 39.00 81.50 154.66 a 421.00 1004.50 1157.00 4531.16
1993 1163.50 1037.50 806.00 626.00 337.00 134.50 14.00 54.50 266.00 614.00 979.00 1044.00 7076.00
1994 1055.50 953.00 760.00 596.50 251.50 22.50 23.50 8.00 135.50 472.00 825.00 915.00 6018.00
1995 1042.50 781.00 840.50 732.50 505.50 171.50 56.50 12.50 243.00 541.00 685.50 989.00 6601.00
1996 1147.00 892.00 932.50 561.50 270.00 57.00 9.00 9.50 252.50 476.00 782.00 1008.00 6397.00
1997 1131.00 943.50 760.00 793.00 354.00 74.50 8.50 40.50 119.00 463.97 a 940.00 1152.00 6779.97
1998 1029.50 892.50 930.00 699.00 279.50 187.00 1.50 23.00 77.00 472.50 701.00 1063.00 6355.50
1999 1021.21 e 744.07 a 665.50 716.90 a 163.00 s 114.50 g 4.65 a 12.00 278.00 479.00 566.00 1029.20 a 5516.53
2000 986.00 773.68 a 761.00 504.00 253.68 a 53.79 a 0.00 a 2.00 180.00 a 498.50 1023.10 a 1116.00 6151.76
2001 1074.84 b 935.50 877.00 538.00 344.00 68.50 0.00 a 0.00 z 120.00 a 454.15 a 713.00 1036.00 6160.99
2002 1095.00 956.50 950.50 476.00 368.00 48.50 0.00 14.00 175.50 646.00 867.00 1033.50 6630.50
2003 895.00 1031.50 840.50 520.00 340.50 152.50 0.00 11.00 246.00 372.00 856.50 985.00 6250.50
2004 1034.00 1037.00 657.50 584.50 278.50 152.00 50.50 89.50 185.00 488.00 843.00 988.50 6388.00
2005 934.50 884.50 881.00 644.00 344.00 118.50 5.00 33.00 114.50 466.00 684.00 1106.50 6215.50
2006 886.50 972.50 822.00 458.00 232.50 30.00 17.50 16.00 283.50 536.00 711.00 1091.50 6057.00
2007 1297.50 898.50 695.50 634.00 295.50 89.50 0.00 4.50 125.00 402.00 703.00 1176.50 6321.50
2008 1180.00 947.00 841.50 646.00 369.00 86.00 0.00 45.00 194.00 475.00 667.50 1109.00 6560.00
2009 1005.50 760.50 743.00 634.50 296.50 131.00 31.00 0.00 z 0.00 z 728.50 697.00 1264.00 6291.50
2010 1065.00 1076.00 825.00 554.00 399.50 64.00 15.00 1.50 59.00 393.00 769.00 910.50 6131.50
2011 1083.00 1046.00 686.00 508.45 a 460.02 c 56.38 a 0.00 0.00 a 165.00 466.50 750.52 a 1136.00 6357.86
2012 919.84 b 1013.00 584.00 446.90 a 239.50 17.68 b 0.00 a 4.59 d 133.89 c 527.50 608.50 1027.50 5522.90
2013 1047.00 968.00 882.35 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 2897.35
Period of Record Statistics
MEAN 1109.63 971.75 867.13 609.25 351.46 109.02 19.12 30.94 187.32 512.93 817.80 1114.79 6660.89
S.D. 132.77 125.13 138.44 91.15 85.69 54.53 26.36 25.94 74.68 95.33 113.77 133.01 450.51
SKEW 0.10 0.65 0.37 -0.02 1.02 0.41 3.57 0.98 0.47 0.72 0.47 0.85 -0.07
MAX 1418.50 1354.50 1211.00 793.93 652.00 238.50 185.00 114.00 410.50 792.50 1108.50 1502.00 7814.64
MIN 771.50 744.07 584.00 360.54 219.14 8.79 0.00 0.00 47.50 301.00 566.00 907.78 5522.90
NO YRS 79 78 76 78 80 81 80 78 76 77 78 77 56