STERLING, COLORADO

Monthly Total Heating Degree Days

(057950)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201104
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
1895 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1896 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1897 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1898 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1906 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1907 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1908 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1909 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 627.50 j 1534.00 1534.00
1910 1300.00 986.00 476.00 417.00 343.50 58.50 12.00 5.17 a 92.22 c 356.00 726.50 1047.50 5820.39
1911 1027.13 a 1018.00 668.50 496.50 231.50 9.50 9.00 34.00 82.50 580.50 911.50 1307.00 6375.63
1912 1367.62 a 1033.64 a 1335.50 500.50 271.50 102.00 6.00 8.50 309.00 492.00 762.00 1148.50 7336.76
1913 1292.00 1238.50 939.00 464.50 220.62 a 41.50 21.50 5.00 320.00 696.00 812.00 1346.00 7396.62
1914 1034.00 1081.50 754.00 501.50 243.00 24.00 4.50 2.00 94.00 388.00 725.50 1483.00 6335.00
1915 1301.00 906.00 1066.50 384.00 375.50 114.00 21.00 22.00 136.50 386.00 730.00 1121.00 6563.50
1916 1484.50 948.71 a 665.50 554.48 a 354.00 110.50 0.00 a 9.19 d 80.50 j 570.83 b 980.36 b 1410.00 7088.07
1917 1388.00 948.50 967.50 488.00 338.00 62.00 0.00 41.50 60.00 541.00 611.50 1159.50 6605.50
1918 1273.00 923.50 665.50 755.00 130.56 e 15.58 d 15.00 0.00 27.00 142.37 d 0.00 z 1180.50 5128.00
1919 1255.00 1156.50 833.00 511.50 273.50 115.00 c 0.00 a 4.00 99.00 685.00 1053.00 1415.00 7400.50
1920 1131.00 985.50 896.50 806.00 259.50 58.97 a 5.17 a 36.88 b 153.00 435.50 931.80 e 1191.50 6891.31
1921 906.00 g 912.07 a 765.70 a 582.00 260.00 41.00 19.00 24.50 g 125.50 371.00 781.00 1188.50 5045.77
1922 1418.50 1105.00 877.00 615.50 282.00 46.50 20.00 0.00 109.00 444.00 909.50 1135.00 6962.00
1923 968.50 1163.50 1073.00 601.50 348.50 54.50 4.00 16.05 c 155.50 633.00 795.00 a 1286.00 7099.05
1924 1459.00 937.50 1193.50 583.00 442.00 105.00 12.50 2.50 230.50 459.50 825.00 1535.50 7785.50
1925 1485.00 837.50 826.00 445.00 246.50 34.50 8.00 2.50 137.07 a 670.50 820.50 1157.00 6670.07
1926 1217.00 795.00 864.00 539.50 213.50 62.00 2.00 0.00 e 183.00 441.00 835.50 1277.50 6430.00
1927 1121.00 827.50 922.00 538.50 198.50 131.00 3.50 35.00 205.50 391.50 733.50 1369.50 6477.00
1928 1075.00 999.50 793.00 588.00 215.50 169.50 2.00 15.50 174.50 510.50 907.50 1255.00 6705.50
1929 1314.50 1316.00 a 840.50 567.00 308.00 75.50 10.00 0.00 242.50 469.50 769.00 k 1239.00 6382.50
1930 1715.50 810.00 920.50 293.28 a 318.78 a 35.50 3.50 0.00 109.00 420.00 744.00 1095.50 6465.56
1931 1038.50 807.50 866.00 336.50 300.50 22.00 3.00 4.50 55.00 321.00 856.50 1137.00 5748.00
1932 1314.00 922.30 a 1066.00 413.50 172.50 22.50 0.00 2.50 91.50 513.50 708.00 1507.00 6733.30
1933 1160.00 1175.50 770.50 534.50 297.50 1.00 0.00 11.00 57.50 339.00 690.00 879.50 5916.00
1934 940.50 875.00 696.50 416.50 96.50 8.50 0.00 15.50 198.50 275.50 719.00 1093.00 5335.00
1935 1062.27 a 864.00 695.00 605.00 418.00 67.50 0.00 6.00 144.31 a 481.00 923.50 1103.50 6370.08
1936 1274.50 1428.00 898.47 b 548.50 177.00 57.00 1.00 8.00 144.00 566.00 860.50 1081.38 a 7044.35
1937 1803.50 1137.00 978.50 526.00 170.00 134.00 0.00 0.00 102.50 492.00 899.46 b 1307.50 7550.46
1938 1210.00 957.50 744.00 510.50 295.00 28.50 0.00 0.00 68.00 380.50 944.50 1225.00 6363.50
1939 1157.00 1227.00 804.40 b 508.50 188.00 33.00 0.00 21.00 104.50 477.00 793.50 948.00 6261.90
1940 1475.00 953.50 782.50 579.50 216.50 51.00 10.50 3.50 78.00 353.00 991.50 1155.50 6650.00
1941 1104.00 943.50 897.50 511.00 121.50 92.50 12.00 4.50 187.50 510.00 798.00 1178.52 a 6360.52
1942 1515.50 1390.00 946.00 392.00 327.00 67.50 1.50 3.50 188.79 a 389.00 797.00 1053.50 7071.29
1943 1149.00 750.08 b 1104.63 a 349.00 369.00 97.50 0.00 0.50 148.97 a 501.00 782.00 1231.50 6483.18
1944 1248.50 1087.00 1040.00 643.00 176.00 71.50 0.00 16.50 140.17 a 423.50 814.00 1311.50 6971.67
1945 1172.50 948.50 800.00 700.50 307.00 196.50 10.00 19.00 279.00 433.50 814.66 a 1217.50 6898.66
1946 1107.00 884.50 684.00 316.00 401.50 77.00 0.00 34.50 149.50 548.00 1005.50 978.00 6185.50
1947 1131.50 1081.50 950.00 556.50 312.50 124.00 0.00 1.50 105.00 336.00 1023.10 a 1102.00 6723.60
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1.50 79.00 509.00 926.50 1194.50 2710.50
1949 1690.50 1098.00 862.50 489.50 213.00 70.50 1.50 1.00 158.50 548.50 626.00 1172.50 6932.00
1950 1366.00 891.50 960.50 588.00 417.00 51.00 5.50 20.50 158.50 294.50 874.00 1000.50 6627.50
1951 1215.00 1032.00 976.50 663.00 227.50 146.50 64.00 11.50 190.50 504.50 903.00 1252.50 7186.50
1952 1145.50 974.50 1034.00 502.00 258.50 6.00 17.00 0.50 109.50 430.38 a 996.00 1348.50 6822.38
1953 1042.00 937.50 676.50 674.50 327.00 30.50 0.00 4.00 77.50 338.00 762.50 1164.00 6034.00
1954 1163.50 669.00 979.00 383.50 310.50 60.50 4.50 2.00 57.00 507.00 716.50 1102.50 5955.50
1955 1411.50 1156.00 939.00 472.50 191.00 108.00 0.50 4.00 120.50 386.50 1004.00 1155.00 6948.50
1956 1094.50 1209.00 868.00 600.50 196.50 5.50 0.00 39.00 172.50 440.00 971.50 1046.00 6643.00
1957 1363.50 811.00 902.00 681.50 321.50 71.50 1.03 a 7.00 196.67 c 482.00 927.00 934.00 6698.70
1958 1122.00 918.50 1151.50 617.50 144.00 38.50 7.50 6.00 126.50 457.00 855.00 1143.50 6587.50
1959 1257.00 1097.00 896.00 570.00 244.50 34.00 13.00 11.50 206.50 594.00 927.00 965.00 6815.50
1960 1368.50 1233.00 943.50 423.00 261.00 57.00 5.00 21.50 171.50 450.02 a 829.00 1209.00 6972.02
1961 1172.00 860.00 870.00 643.00 316.50 56.50 6.00 0.00 270.00 490.00 931.50 1259.63 a 6875.13
1962 1487.50 965.50 944.47 a 443.00 175.00 68.00 1.00 22.50 160.00 422.00 756.50 1088.50 6533.97
1963 1603.50 797.00 797.00 418.50 131.50 28.50 0.50 2.50 66.50 273.50 778.50 1281.00 6178.50
1964 1095.50 1125.50 1013.50 537.00 205.93 c 84.50 0.50 56.50 181.61 b 448.50 805.00 1188.50 6742.54
1965 1055.00 1114.00 1220.00 454.00 239.00 48.00 1.00 10.00 386.38 a 381.00 689.50 1092.00 6689.88
1966 1409.50 1182.50 773.50 610.50 232.00 69.00 0.00 35.00 125.50 515.50 832.50 1148.50 6934.00
1967 1083.50 897.00 729.00 460.00 404.00 92.00 0.00 14.50 152.00 443.50 861.00 1306.00 6442.50
1968 1268.00 929.50 753.50 620.50 341.50 34.00 4.00 47.50 162.50 419.50 862.50 1273.00 6716.00
1969 1197.50 883.50 1044.00 391.00 179.00 123.00 0.00 2.50 48.00 742.00 801.50 1041.00 6453.00
1970 1175.50 818.50 988.50 626.00 164.50 78.50 0.50 3.50 216.00 588.50 836.00 1118.00 6614.00
1971 1219.00 1000.00 935.00 498.50 310.00 14.50 10.00 0.00 258.50 516.50 831.00 1175.50 6768.50
1972 1386.00 877.50 652.50 495.50 247.50 14.00 34.50 20.50 155.00 495.00 1110.00 1457.00 6945.00
1973 1319.00 757.00 f 811.50 657.00 287.50 43.00 19.50 0.00 214.50 415.00 913.50 1212.00 5892.50
1974 1488.00 915.00 782.00 508.50 164.00 50.50 0.00 17.50 228.50 370.50 831.00 1138.50 6494.00
1975 1163.50 1075.50 943.00 617.50 286.00 78.50 0.00 n 9.00 170.00 414.50 929.00 1048.50 6735.00
1976 1168.00 792.00 906.00 449.50 253.00 45.50 0.00 11.00 102.50 552.50 897.50 1036.00 6213.50
1977 1376.50 809.50 853.50 414.00 97.50 0.00 2.50 f 14.95 c 58.50 413.50 843.00 1094.50 5975.45
1978 1439.50 1177.00 757.50 430.50 300.50 67.50 3.74 b 13.50 n 150.00 533.20 a 982.50 1529.33 a 7371.27
1979 1608.50 1024.50 776.55 a 492.50 315.50 76.80 e 0.00 c 41.16 b 96.00 403.50 1060.00 1169.73 a 7064.74
1980 1383.00 1028.43 b 787.00 f 558.00 245.42 a 19.14 a 0.00 6.72 a 108.62 a 534.50 821.25 b 939.19 d 5644.25
1981 1046.00 969.00 844.50 366.50 397.83 a 36.60 e 8.27 a 22.45 b 69.00 481.53 a 751.50 1088.50 6081.68
1982 1326.50 1072.00 834.00 600.00 303.50 121.00 4.50 5.50 146.00 535.50 938.00 1106.50 6993.00
1983 1047.00 756.00 832.00 673.00 368.50 122.00 2.50 0.00 97.50 397.00 815.50 1637.00 6748.00
1984 1423.50 980.00 884.00 705.50 221.00 63.50 0.00 0.00 194.00 554.50 788.50 1125.30 a 6939.80
1985 1261.18 a 1165.50 678.00 0.00 z 141.50 73.50 0.00 7.00 232.00 527.00 1168.50 1405.00 6659.18
1986 1156.50 982.50 600.50 447.00 283.50 23.50 0.00 4.00 116.00 450.00 846.50 1198.00 6108.00
1987 1074.00 759.00 985.00 397.50 128.50 16.00 13.00 19.78 b 108.00 420.00 751.50 1157.00 5829.28
1988 1477.50 1033.50 797.50 489.50 200.00 12.50 1.50 1.00 119.50 371.50 720.00 1100.00 6324.00
1989 1069.50 1200.00 741.00 422.00 162.00 60.50 1.60 b 3.00 156.00 436.50 731.00 1277.00 6260.10
1990 1078.50 1025.63 a 772.00 438.50 274.50 8.00 18.50 7.00 71.00 450.00 724.00 1366.00 6233.63
1991 1251.50 724.00 739.00 468.00 162.50 9.00 6.00 2.00 95.50 446.50 927.00 1034.00 5865.00
1992 1202.50 739.50 652.00 359.00 146.50 37.50 14.50 29.00 74.50 397.50 963.00 1476.00 6091.50
1993 1409.00 1186.50 749.50 509.00 167.50 70.00 0.00 15.00 190.50 478.00 965.00 1076.50 6816.50
1994 1076.00 1063.00 662.50 473.00 115.00 3.50 6.00 0.00 81.00 393.00 838.00 969.00 5680.00
1995 1187.50 795.50 775.00 617.50 397.50 74.00 6.50 8.00 149.00 481.50 747.00 0.00 z 5239.00
1996 1232.00 917.00 882.50 461.50 257.50 15.50 2.50 3.62 a 150.00 424.00 891.00 1074.00 6311.12
1997 1227.00 917.00 723.50 637.00 234.00 10.00 4.00 13.00 100.50 454.00 870.00 1110.50 6300.50
1998 1062.50 804.00 865.86 b 516.50 140.50 108.50 2.00 2.00 40.00 442.00 724.00 1156.00 5863.86
1999 980.50 738.00 693.37 a 550.50 216.00 30.50 0.00 6.50 168.00 415.50 619.00 965.50 5383.37
2000 1023.00 800.00 702.00 432.00 156.50 33.50 0.50 0.00 151.50 363.50 1077.00 1218.00 5957.50
2001 1078.00 1025.00 785.50 457.24 a 201.00 42.00 0.00 0.00 65.00 434.53 b 743.00 1064.50 5895.78
2002 1090.00 897.50 966.00 404.00 244.00 9.50 0.00 5.50 97.00 609.00 845.00 992.00 6159.50
2003 934.50 1030.00 732.50 366.50 157.50 37.50 0.00 0.00 137.00 448.50 0.00 z 0.00 z 3844.00
2004 359.50 t 941.00 588.50 385.50 157.00 67.00 16.50 33.00 93.50 388.00 801.00 1033.50 4504.50
2005 1057.00 797.50 727.50 0.00 z 272.00 49.80 e 5.00 12.50 16.50 l 405.50 614.00 1115.00 5055.80
2006 831.50 988.75 d 790.00 343.00 168.00 6.50 0.00 7.00 207.00 475.00 759.50 1115.50 5691.75
2007 1462.88 b 1067.50 559.03 a 550.50 140.00 35.00 0.00 1.50 85.50 362.50 710.00 1381.00 6355.41
2008 1327.50 973.00 752.50 553.00 257.00 29.00 0.00 12.50 102.00 448.00 674.50 1263.00 6392.00
2009 1060.00 792.00 735.45 b 537.00 199.00 60.00 a 4.28 b 1.00 130.00 680.00 594.00 f 1313.50 5512.22
2010 1100.50 1016.50 742.50 0.00 z 19.50 t 29.00 4.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2892.50
2011 0.00 z 0.00 z 0.00 z 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 0.00
Period of Record Statistics
MEAN 1238.59 977.96 844.44 513.71 247.46 56.83 5.50 10.81 141.32 459.07 840.74 1186.80 6525.67
S.D. 184.63 152.54 147.49 102.68 81.91 39.65 8.90 12.49 65.21 95.59 112.80 151.65 479.18
SKEW 0.60 0.46 0.52 0.24 0.29 0.92 3.56 1.52 0.98 0.28 0.35 0.66 -0.08
MAX 1803.50 1428.00 1335.50 806.00 442.00 196.50 64.00 56.50 386.38 742.00 1168.50 1637.00 7785.50
MIN 831.50 669.00 476.00 293.28 96.50 0.00 0.00 0.00 27.00 142.37 611.50 879.50 5335.00
NO YRS 98 99 99 97 99 100 98 98 98 100 96 99 84