FT COLLINS, COLORADO

Monthly Total Heating Degree Days

(053005)

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 991.00 1056.00 940.50 654.83 a 0.00 z 0.00 z 0.00 z 21.50 0.00 z 0.00 z 0.00 z 0.00 z 3663.83
1894 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 82.50 0.00 z 0.00 z 184.50 424.50 735.50 1203.32 a 2630.32
1895 1272.50 1229.00 955.00 476.50 376.50 171.00 68.00 13.00 188.79 a 552.83 a 937.50 1128.00 7368.63
1896 1008.00 914.00 961.00 536.38 a 257.00 50.00 0.00 22.22 a 203.50 527.50 1027.50 958.00 6465.10
1897 1246.50 1013.38 b 1002.85 a 574.50 198.18 c 87.78 c 33.00 15.50 87.50 505.50 868.00 1230.00 6862.69
1898 1220.00 866.00 1000.50 520.00 421.50 94.50 15.00 9.50 207.50 579.00 1038.50 1282.50 7254.50
1899 1240.50 1534.50 1078.00 597.00 341.50 105.00 20.50 5.50 139.50 576.50 723.00 1143.00 7504.50
1900 1055.50 1141.50 802.00 662.00 228.50 48.00 20.00 13.50 219.50 456.50 828.00 1035.00 6510.00
1901 1138.50 1151.50 940.50 630.50 248.50 102.00 1.00 3.00 198.50 475.50 749.00 1154.00 6792.50
1902 1265.50 925.00 921.50 579.00 275.50 90.50 48.00 13.50 192.00 f 499.00 866.50 1176.50 6660.50
1903 1076.00 1426.50 1067.00 590.50 397.00 195.00 27.50 13.50 268.00 478.50 867.00 1013.50 7420.00
1904 1208.00 860.50 788.50 565.00 349.50 155.00 45.50 24.00 176.00 499.50 757.50 1024.50 6453.50
1905 1240.00 1220.50 715.50 648.00 399.50 55.50 38.00 4.00 136.00 664.50 815.00 1178.50 7115.00
1906 1057.50 966.50 1239.50 536.50 310.50 122.00 57.00 19.00 202.00 578.50 943.00 937.00 6969.00
1907 1212.00 823.50 669.60 a 672.50 497.50 135.00 15.00 24.50 192.50 468.00 962.00 1070.00 6742.10
1908 1142.50 1015.60 e 765.00 515.00 406.50 124.00 32.50 48.00 129.50 578.50 988.50 1247.00 6992.60
1909 1098.50 1010.50 938.00 697.00 409.50 76.00 4.50 6.00 199.00 482.50 818.00 1450.50 7190.00
1910 1232.00 1090.96 a 555.50 444.50 352.50 68.00 12.50 46.50 134.50 418.50 744.00 1049.50 6148.96
1911 1036.50 1073.50 723.00 560.50 282.00 30.50 21.00 46.00 119.00 611.00 984.00 1285.00 6772.00
1912 1224.00 1135.50 1316.50 632.00 369.00 190.00 39.00 32.00 419.50 629.50 841.50 1187.30 a 8015.80
1913 1293.22 a 1281.00 988.50 567.00 320.00 90.50 36.00 0.00 279.00 632.00 769.00 1489.00 7745.22
1914 1132.00 1137.00 859.00 609.50 320.00 88.50 12.50 28.50 144.50 458.50 753.50 1358.00 6901.50
1915 1268.00 922.00 1052.00 448.50 456.00 168.50 59.00 80.50 240.00 487.50 795.00 1132.00 7109.00
1916 1457.00 968.50 683.00 609.50 406.00 134.50 5.00 45.00 232.00 604.00 1058.00 1360.00 7562.50
1917 1335.00 987.50 1137.70 a 688.00 562.00 120.50 6.00 42.50 159.00 585.00 680.00 1016.00 7319.20
1918 1384.00 914.50 692.00 736.50 334.00 56.00 11.50 28.50 315.00 444.00 987.50 1170.00 7073.50
1919 1113.50 1056.00 843.00 540.00 322.00 113.00 0.00 10.50 142.00 693.50 1056.72 a 1314.50 7204.72
1920 1089.00 1039.50 903.65 a 853.00 335.00 104.00 9.00 45.50 206.50 524.50 960.50 1139.50 7209.65
1921 1157.50 907.50 715.00 648.00 301.00 66.50 28.50 7.00 164.00 392.50 795.00 1122.20 a 6304.70
1922 1399.00 1077.50 884.00 643.50 301.50 60.00 18.00 0.00 103.00 523.00 907.00 1104.00 7020.50
1923 967.50 1158.50 1156.00 606.00 330.50 97.00 0.00 16.00 222.86 b 700.00 802.50 1178.00 7234.86
1924 1358.00 913.00 1237.00 616.50 423.00 85.00 10.00 9.00 257.00 457.00 774.00 1374.50 7514.00
1925 1279.00 808.00 758.50 435.00 247.50 54.50 9.00 16.00 157.00 763.00 907.50 1190.50 6625.50
1926 1250.00 840.50 910.00 578.50 287.00 72.50 15.00 3.50 220.50 471.00 773.00 1308.50 6730.00
1927 1079.50 948.50 973.50 594.50 273.00 144.50 13.00 52.00 216.50 461.50 755.50 1374.50 6886.50
1928 1072.00 1027.50 843.00 640.86 a 294.00 238.00 7.50 44.00 204.50 559.00 900.00 1255.50 7085.86
1929 1316.50 1350.50 871.50 609.00 382.50 82.50 14.00 2.50 286.50 515.00 1126.00 1111.87 a 7668.37
1930 1736.50 813.50 977.00 394.50 438.00 69.00 14.00 10.50 177.50 573.50 831.50 1156.50 7192.00
1931 1086.00 848.50 946.53 a 584.50 370.50 35.50 10.00 11.50 98.00 453.00 970.34 a 1103.50 6517.88
1932 1257.50 880.00 1117.00 516.00 265.50 89.50 0.00 18.00 167.00 596.50 771.50 1535.50 7214.00
1933 1115.00 1147.00 768.50 615.56 c 369.00 15.00 0.00 24.50 103.00 390.50 710.50 823.50 6082.06
1934 908.00 914.00 726.00 505.00 104.50 f 36.00 0.00 a 18.50 283.00 369.50 728.50 998.50 5487.00
1935 1027.00 900.00 780.00 597.50 500.50 96.00 0.00 10.00 180.00 551.50 925.50 1061.00 6629.00
1936 1112.00 1314.00 823.50 516.50 187.00 54.00 0.50 14.00 159.50 558.00 831.00 1068.00 6638.00
1937 1678.50 1008.00 922.77 a 587.50 245.00 135.00 0.00 a 0.50 113.00 424.50 845.50 1168.00 7128.27
1938 1140.50 926.00 721.50 530.00 339.00 53.50 1.50 2.00 80.50 350.41 c 904.50 1154.00 6203.41
1939 1063.00 1204.50 817.00 476.00 179.00 51.00 0.00 29.00 91.00 451.50 786.50 913.00 6061.50
1940 1440.00 947.50 677.41 d 492.50 220.50 40.50 3.88 c 5.50 99.00 417.50 958.50 1095.50 6398.28
1941 1113.00 889.50 896.50 620.17 a 226.00 119.50 7.00 30.00 229.50 543.50 770.50 1126.50 6571.67
1942 1407.50 1297.00 939.50 476.50 364.50 94.66 a 7.50 10.50 188.00 507.00 813.50 997.68 a 7103.84
1943 1094.00 810.00 1051.00 396.50 420.00 126.50 0.50 0.50 175.50 489.00 810.00 1082.00 6455.50
1944 1192.50 1012.00 1004.50 698.00 281.50 96.50 3.50 17.00 173.00 449.50 827.00 1189.00 6944.00
1945 1123.50 953.50 824.00 760.50 309.00 208.50 10.00 18.00 275.00 454.00 766.00 1156.00 6858.00
1946 1088.50 902.00 687.68 a 361.00 419.50 72.50 0.50 37.72 a 190.00 574.50 987.50 974.50 6295.90
1947 1154.50 1083.00 974.00 573.50 329.00 156.50 3.00 7.50 103.00 373.50 1032.00 1049.50 6839.00
1948 1292.00 1175.50 1095.00 460.50 284.17 a 63.50 0.00 3.00 71.00 509.50 903.50 1180.50 7038.17
1949 1587.00 1104.00 855.00 508.00 285.00 92.00 2.50 9.00 163.00 569.50 575.50 1117.50 6868.00
1950 1257.00 841.00 856.00 548.00 419.00 80.00 15.50 28.50 209.00 361.00 841.00 982.50 6438.50
1951 1222.00 968.00 961.50 652.50 312.00 200.00 19.50 25.00 212.50 582.50 936.50 1205.00 7297.00
1952 1173.50 938.50 1068.50 541.00 290.00 13.50 25.00 11.00 119.00 498.00 1050.00 1096.00 6824.00
1953 872.50 940.00 742.00 703.50 384.50 42.00 0.00 10.00 110.00 427.00 753.50 1055.50 6040.50
1954 1024.00 665.00 986.50 381.00 289.00 54.00 1.00 7.00 100.00 466.00 701.00 1028.00 5702.50
1955 1312.00 1156.50 948.00 500.50 231.00 130.50 0.00 3.00 159.50 427.50 953.00 1079.50 6901.00
1956 1052.50 1241.00 877.50 606.00 209.50 1.00 2.50 30.50 108.00 417.50 868.00 966.50 6380.50
1957 1365.50 791.00 847.00 751.50 392.00 74.00 0.50 2.50 203.50 454.50 931.50 872.00 6685.50
1958 1093.50 845.00 1047.50 637.00 173.00 40.00 17.50 2.00 129.50 409.00 829.00 1063.50 6286.50
1959 1176.00 1090.00 846.50 658.00 320.00 35.00 4.00 2.00 232.50 596.50 879.50 956.50 6796.50
1960 1234.00 1160.50 914.00 472.00 297.50 29.00 7.00 19.00 145.50 457.50 820.00 1086.55 a 6642.55
1961 1112.50 838.00 885.00 580.00 296.50 66.50 10.00 2.00 314.50 522.50 933.00 1190.00 6750.50
1962 1530.00 1011.00 961.00 a 484.50 230.00 100.00 6.50 30.50 161.50 391.00 722.00 1029.50 6657.50
1963 1491.00 793.00 895.00 503.00 200.50 47.00 0.00 7.00 56.00 320.50 751.50 1216.00 6280.50
1964 1098.00 1067.00 1027.00 587.00 253.50 98.50 0.00 53.00 174.00 448.50 817.00 1063.00 6686.50
1965 978.00 1037.00 1174.50 481.00 296.50 77.50 1.50 16.50 366.50 368.00 680.50 1030.50 6508.00
1966 1214.50 1094.50 722.00 602.50 200.00 82.00 0.00 23.00 113.00 494.00 821.00 1091.50 6458.00
1967 1022.50 843.00 690.50 478.50 384.50 146.50 0.00 25.00 147.50 402.50 822.00 1242.50 6205.00
1968 1124.00 880.00 752.00 669.00 372.00 39.50 13.00 38.50 186.50 444.50 876.50 1126.50 6522.00
1969 1061.50 901.00 1030.00 399.50 234.50 168.50 0.00 0.00 96.00 770.50 818.50 1011.50 6491.50
1970 1083.50 767.00 985.50 676.50 16.00 z 88.50 1.50 0.00 215.50 617.00 774.00 1067.50 6276.50
1971 1106.00 972.00 847.50 544.50 330.00 37.50 24.50 0.50 295.00 522.00 824.50 1107.00 6611.00
1972 1180.00 809.50 613.50 494.50 263.50 8.50 44.50 28.50 155.00 486.50 974.50 1319.00 6377.50
1973 1190.50 934.00 844.00 678.00 292.00 54.50 24.50 0.50 196.00 409.00 872.00 1048.50 6543.50
1974 1248.50 828.50 719.50 534.50 159.50 72.50 0.00 29.50 225.00 415.50 806.50 1102.00 6141.50
1975 1084.50 981.50 872.00 651.50 362.50 96.50 1.00 15.00 192.50 428.00 855.50 1000.50 6541.00
1976 1137.50 813.00 868.50 492.50 274.00 60.50 0.00 7.00 155.00 564.00 838.50 985.00 6195.50
1977 1228.50 802.00 815.50 450.50 170.00 0.00 3.00 17.50 63.00 411.00 795.50 963.50 5720.00
1978 1282.00 1038.00 697.50 461.50 348.50 78.00 2.50 23.00 118.50 451.00 872.50 1314.00 6687.00
1979 1493.50 930.50 764.00 495.52 a 348.50 86.50 1.00 36.50 88.50 381.50 1021.50 1036.50 6684.02
1980 1281.50 1018.00 920.00 563.00 330.00 24.00 0.00 15.00 103.00 498.50 773.50 813.50 6340.00
1981 989.50 854.50 766.00 325.00 321.50 40.00 8.50 10.50 47.00 490.50 669.00 1002.00 5524.00
1982 1142.50 937.00 747.50 534.50 305.50 122.50 5.50 0.50 187.00 518.00 932.50 1086.00 6519.00
1983 976.00 794.00 838.00 721.50 395.50 130.50 2.50 0.00 118.50 424.50 850.00 1440.00 6691.00
1984 1232.00 893.00 836.50 668.50 200.50 83.50 0.00 0.00 198.00 618.00 768.00 1035.00 6533.00
1985 1254.00 1083.00 740.00 394.00 172.50 62.50 1.00 9.00 248.00 509.50 1087.00 1208.00 6768.50
1986 893.50 821.00 574.00 477.50 270.00 24.00 0.00 0.00 186.50 508.50 817.50 1100.50 5673.00
1987 1047.50 836.00 859.50 420.00 211.50 24.00 12.50 39.00 152.00 460.00 792.00 1147.00 6001.00
1988 1258.50 942.00 830.50 487.50 221.50 9.50 3.50 2.50 169.00 368.00 757.00 1153.00 6202.50
1989 1018.00 1216.00 738.50 439.00 223.50 97.00 0.00 3.00 174.00 465.00 718.00 1170.50 6262.50
1990 939.00 916.50 857.00 503.00 312.50 21.50 19.50 7.00 78.00 467.50 697.50 1290.00 6109.00
1991 1218.50 753.50 712.00 513.50 211.00 43.50 11.50 2.00 146.50 464.00 898.00 1013.50 5987.50
1992 1037.50 743.50 687.50 367.00 199.50 60.50 23.50 59.50 93.50 386.50 946.00 1230.50 5835.00
1993 1246.00 1037.50 712.00 527.50 216.00 87.50 6.50 24.50 213.50 541.00 948.00 1013.00 6573.00
1994 991.50 999.50 676.50 500.00 146.00 7.00 3.50 3.50 94.00 469.00 826.00 983.50 5700.00
1995 1026.50 795.00 744.50 619.00 439.00 109.50 4.50 1.00 203.00 482.00 690.50 975.00 6089.50
1996 1156.50 906.00 848.00 462.50 246.50 21.00 1.50 3.50 182.50 445.00 810.50 992.00 6075.50
1997 1167.00 917.50 685.00 652.50 229.00 34.50 3.00 13.50 104.50 449.00 870.00 1019.50 6145.00
1998 962.00 819.50 817.00 524.00 180.50 131.00 0.00 1.50 59.00 468.50 688.00 1122.50 5773.50
1999 938.50 710.50 653.00 594.00 277.00 77.50 0.00 4.50 208.00 467.00 624.50 882.50 5437.00
2000 964.00 744.50 687.50 397.00 160.00 62.00 0.00 2.50 159.00 467.00 1007.00 1108.50 5759.00
2001 1052.00 960.00 764.00 427.00 243.50 36.50 0.00 1.00 78.50 459.00 701.00 1014.00 5736.50
2002 1095.50 863.00 900.00 399.00 283.50 17.00 0.00 6.00 119.50 625.50 814.50 951.50 6075.00
2003 860.50 975.50 704.50 433.00 234.50 81.50 0.00 13.50 173.50 303.00 836.50 979.50 5595.50
2004 1005.00 950.00 543.00 456.50 165.50 89.50 20.50 40.50 124.00 435.50 804.00 970.50 5604.50
2005 998.00 779.50 711.50 496.50 260.50 73.00 2.50 7.00 92.50 418.00 683.00 1065.00 5587.00
2006 833.00 926.00 800.00 351.00 175.00 1.50 2.50 8.50 202.50 503.00 755.00 1066.50 5624.50
2007 1282.00 924.00 571.00 502.00 209.00 35.50 0.00 0.00 107.00 397.50 706.00 1177.00 5911.00
2008 1169.00 854.00 748.50 525.00 0.00 z 46.00 0.00 23.00 151.50 451.00 634.50 1149.50 5752.00
2009 946.50 760.00 693.50 530.00 187.00 93.50 14.00 12.00 116.50 674.50 697.50 1270.00 5995.00
2010 1082.50 993.00 699.50 481.50 328.00 38.00 5.50 0.00 49.00 340.00 816.00 948.50 5781.50
2011 1081.50 988.50 646.00 480.00 361.50 29.50 0.00 0.00 109.50 412.00 762.00 1109.50 5980.00
2012 879.50 947.50 467.00 309.00 160.00 4.00 0.00 2.50 72.50 497.00 691.50 1061.50 5092.00
2013 1067.50 932.50 780.50 19.50 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 2780.50
Period of Record Statistics
MEAN 1158.95 970.75 847.59 546.07 297.91 78.91 10.12 15.96 166.48 490.01 836.61 1114.18 6542.52
S.D. 163.43 154.62 155.54 100.77 85.07 48.15 13.98 15.70 67.02 87.83 108.93 133.75 565.15
SKEW 0.81 0.89 0.41 0.13 0.38 0.77 1.95 1.30 0.75 0.72 0.33 0.64 -0.01
MAX 1736.50 1534.50 1316.50 853.00 562.00 238.00 68.00 80.50 419.50 770.50 1126.00 1535.50 8015.80
MIN 833.00 665.00 467.00 309.00 146.00 0.00 0.00 0.00 47.00 303.00 575.50 813.50 5092.00
NO YRS 120 120 120 119 115 119 118 119 118 119 119 119 114