COLLBRAN, COLORADO

Monthly Total Heating Degree Days

(051741)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 199912
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1894 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
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 163.00 v 818.00 1157.50 1975.50
1901 1321.00 930.50 913.50 574.00 204.50 119.50 0.00 14.00 144.50 434.00 791.38 a 1162.50 b 6609.38
1902 1256.50 939.50 966.00 471.00 246.50 32.00 43.50 11.50 167.50 489.50 890.00 1323.00 6836.50
1903 1352.50 1370.50 932.00 587.50 373.50 105.50 23.00 11.50 263.50 520.50 844.00 1296.00 7680.00
1904 1409.50 937.50 757.50 492.50 328.50 118.00 22.00 15.00 153.00 537.50 871.50 1252.50 6895.00
1905 1309.50 1098.50 752.00 550.00 402.50 48.00 13.00 3.00 164.00 648.00 832.00 1515.50 7336.00
1906 1343.50 924.50 890.00 552.00 333.00 137.00 25.50 23.50 189.50 560.00 896.50 1041.00 6916.00
1907 1118.00 733.00 732.00 495.00 456.73 a 188.50 7.75 a 20.50 188.04 b 395.25 e 645.50 j 1233.28 a 5568.05
1908 1330.00 1158.00 628.00 g 399.50 g 470.54 c 206.00 10.00 40.50 184.66 a 680.50 909.50 1250.50 6240.19
1909 1138.50 1073.50 886.50 710.00 452.50 92.00 1.50 4.50 213.50 438.00 845.00 1491.00 7346.50
1910 1295.50 1104.50 607.50 508.50 325.00 43.50 4.50 19.00 117.50 507.88 a 706.50 1107.50 6347.38
1911 1101.50 980.50 761.50 580.00 307.00 91.00 23.50 32.07 b 137.50 622.00 1010.50 1327.00 6974.07
1912 1280.00 1073.00 926.00 720.00 417.50 134.00 36.50 26.00 374.50 604.00 846.00 1471.50 7909.00
1913 1472.00 1095.00 1024.00 544.00 273.50 98.50 20.50 1.50 248.50 590.72 d 783.50 1332.50 7484.22
1914 1209.00 1064.50 881.00 544.00 241.00 i 113.50 4.13 a 29.00 121.50 495.00 733.45 a 1313.50 6508.58
1915 1371.50 1002.50 894.50 432.00 408.50 170.00 10.50 9.50 189.83 a 448.50 898.00 1196.50 7031.83
1916 1284.00 1007.00 758.50 542.00 411.50 112.50 2.00 32.00 193.00 564.50 958.50 1341.50 7207.00
1917 1451.00 1059.50 1119.00 731.50 519.00 127.00 1.03 a 25.00 167.50 517.50 672.50 685.50 h 6390.53
1918 1344.00 1040.15 a 729.10 e 692.50 341.50 26.50 h 4.50 24.00 177.60 e 454.15 a 998.00 1302.50 7107.99
1919 1380.00 1105.00 926.50 511.50 239.50 87.41 a 0.00 a 3.50 114.50 625.00 912.00 1378.50 7283.41
1920 1300.00 1001.50 638.00 k 755.50 286.23 a 93.50 1.03 a 33.00 175.34 a 0.00 z 0.00 z 0.00 z 3646.11
1921 0.00 z 0.00 z 0.00 z 641.50 327.50 138.00 49.00 27.00 197.00 379.50 f 700.71 b 785.50 g 2080.71
1922 1429.10 a 1054.26 e 965.00 683.00 374.50 92.68 b 4.50 7.00 153.00 567.00 919.00 1134.50 7383.54
1923 1180.00 1082.50 1071.50 604.50 343.00 143.00 0.00 44.43 a 261.00 654.50 903.75 b 1270.00 7558.18
1924 1533.50 971.50 1022.50 627.50 381.96 c 117.22 c 12.92 a 32.00 i 250.00 c 565.75 e 890.00 c 1491.21 b 7864.06
1925 1534.50 1064.50 865.86 b 513.62 a 218.79 e 108.60 e 1.79 e 53.98 b 178.39 b 580.14 c 971.40 e 1174.90 a 7266.48
1926 1443.57 a 976.77 b 865.79 c 490.86 a 330.00 67.22 c 0.00 z 0.00 z 0.00 z 522.57 c 854.48 a 1311.00 6862.26
1927 1197.00 966.50 955.50 576.72 a 392.15 a 103.27 d 5.17 d 42.22 b 230.19 d 553.35 a 804.11 b 1384.00 7210.18
1928 1281.33 a 1041.93 a 791.00 667.50 292.43 a 196.61 b 18.71 b 55.36 c 213.50 538.00 898.50 1443.50 7438.37
1929 1412.00 1284.00 1005.50 677.50 404.00 130.86 a 10.69 b 1.03 a 0.00 z 585.90 a 1091.38 a 1202.50 7805.36
1930 1555.68 a 1002.50 950.31 b 453.00 e 451.88 e 120.58 d 0.00 a 12.29 b 247.50 b 625.68 a 1042.00 1526.00 7987.43
1931 1431.50 915.00 963.50 556.55 a 403.00 b 28.45 a 13.00 15.50 139.50 409.00 f 1025.00 1421.50 6912.50
1932 1510.00 1029.00 949.38 c 596.90 a 332.00 149.40 e 7.75 a 41.85 a 253.50 601.50 904.62 d 1486.50 7862.39
1933 1451.00 1438.50 868.52 a 698.28 a 459.50 12.93 a 0.00 b 23.50 101.38 a 447.50 894.81 d 1133.29 e 7529.20
1934 1176.97 a 799.62 b 664.90 b 449.48 a 174.63 a 92.07 a 0.00 0.00 b 219.83 a 473.50 883.50 1262.22 a 6196.71
1935 1234.50 1049.00 916.57 a 583.00 389.50 71.50 f 1.60 b 2.58 a 187.00 564.95 b 931.50 1296.32 a 7156.52
1936 1325.00 1073.00 857.48 c 549.00 261.71 e 81.21 a 12.00 14.50 230.00 567.00 978.00 1262.00 7210.90
1937 1708.44 d 1172.50 890.73 a 609.00 265.71 c 141.00 6.20 a 4.50 161.50 521.50 834.00 1181.00 7496.09
1938 1282.50 985.00 861.05 b 558.50 376.28 b 55.00 20.00 28.93 a 192.93 a 501.00 1104.50 1290.50 7256.19
1939 1344.37 a 1384.00 928.45 a 498.75 b 262.97 b 123.21 b 1.55 a 12.50 149.50 600.00 859.50 1102.50 7267.30
1940 1336.10 a 1054.00 814.04 d 555.00 a 242.00 60.50 1.60 b 25.83 a 161.38 a 548.18 a 999.50 1200.00 6998.14
1941 1301.50 960.00 876.78 a 637.00 275.26 b 162.32 b 7.50 33.00 251.00 f 580.00 920.50 1148.50 6902.36
1942 1397.50 1304.50 1127.37 a 531.21 a 383.22 b 95.50 4.00 31.52 a 262.50 b 565.48 b 813.21 b 1106.70 a 7622.71
1943 1169.22 a 989.33 a 920.91 b 404.00 369.00 147.50 12.00 25.50 218.79 a 529.00 912.00 1156.50 6853.76
1944 1433.00 1090.50 972.50 680.50 329.50 166.00 23.00 65.00 233.50 507.50 888.00 1217.50 7606.50
1945 1211.00 934.50 920.00 726.50 300.50 222.00 12.50 29.50 290.50 527.00 985.00 1373.50 7532.50
1946 1480.00 1159.00 853.50 448.50 418.50 104.00 5.00 21.00 242.50 649.50 803.00 f 1115.00 6496.50
1947 1466.50 1008.50 874.50 621.50 288.50 206.50 5.00 38.50 156.50 474.50 1059.00 1251.50 7451.00
1948 1411.00 1183.50 1126.50 557.50 282.00 127.50 13.50 50.00 177.50 582.00 1119.00 1270.00 7900.00
1949 1489.00 721.00 n 543.00 k 536.00 352.50 147.00 6.00 15.00 168.00 595.50 767.50 1217.00 5293.50
1950 1271.00 961.50 879.00 515.50 386.00 72.50 1.00 17.50 209.50 349.00 800.50 1073.00 6536.00
1951 1315.00 983.50 894.00 563.50 288.00 145.00 0.00 19.50 l 205.00 562.00 1031.00 1323.50 7310.50
1952 1300.50 1199.50 1058.50 524.00 275.50 23.00 1.00 h 23.25 e 151.00 479.00 1008.50 1208.00 7250.75
1953 1027.50 982.50 761.50 585.00 420.00 55.00 0.50 13.00 60.50 415.00 755.00 1221.00 6296.50
1954 1036.00 746.00 887.50 400.00 214.50 99.00 0.00 2.50 122.00 406.00 669.00 1199.50 5782.00
1955 1289.50 1191.50 927.50 582.00 302.00 122.50 0.00 b 0.00 96.50 408.50 1011.92 d 1021.50 6953.42
1956 980.00 1127.50 830.00 540.50 207.00 18.00 5.00 16.50 51.50 393.18 a 965.50 1215.50 6350.18
1957 1210.00 853.50 816.00 610.00 437.00 110.50 4.00 28.00 190.00 451.00 972.50 1123.75 e 6806.25
1958 1192.50 834.00 918.50 638.50 186.00 24.00 2.00 3.00 159.50 419.00 817.50 981.00 6175.50
1959 1185.00 952.50 866.50 543.50 287.00 31.50 5.00 0.00 217.00 509.50 841.50 1079.00 6518.00
1960 1249.00 1160.00 779.50 484.00 307.00 37.00 0.00 20.50 73.50 451.00 786.00 1130.00 6477.50
1961 1156.50 868.00 848.50 603.21 b 255.50 38.50 2.00 3.50 312.50 504.00 894.00 854.50 j 5486.21
1962 1305.00 859.00 992.50 399.50 301.50 86.67 c 0.00 10.50 97.00 326.50 685.00 1066.00 6129.17
1963 1454.00 812.00 860.00 526.00 142.50 68.00 0.00 a 8.50 26.50 234.00 726.00 1157.50 6015.00
1964 1303.50 1196.52 b 1060.00 587.50 288.50 97.50 0.00 33.14 b 105.50 323.50 881.50 1207.50 7084.66
1965 1088.00 1023.50 988.00 553.50 337.50 106.50 1.00 17.50 246.50 353.00 696.00 1079.00 6490.00
1966 1274.00 1108.00 792.00 545.50 226.00 71.50 0.00 32.00 148.00 548.50 758.00 1167.50 6671.00
1967 0.00 z 0.00 z 0.00 z 375.00 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1968 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1969 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1970 0.00 z 870.50 991.50 794.50 313.50 150.50 2.00 7.50 288.50 697.50 874.00 1212.00 6202.00
1971 1261.50 1007.50 918.50 595.50 398.00 106.00 22.00 7.00 344.00 591.14 b 980.50 1353.67 a 7585.30
1972 1292.50 988.59 a 722.82 a 450.50 f 275.50 g 80.56 c 4.50 55.36 c 211.55 a 528.03 a 1055.77 d 1043.50 h 4939.67
1973 1577.00 1130.00 965.00 612.00 g 171.50 p 200.50 50.00 44.84 c 293.33 c 521.66 b 913.50 1299.00 6994.83
1974 1470.50 1210.50 463.00 m 0.00 z 249.00 f 137.00 16.50 99.00 284.50 559.00 902.00 1320.71 b 5999.71
1975 1536.50 1104.00 974.00 773.79 a 456.00 192.50 10.00 108.50 278.00 562.50 1054.00 1105.50 8155.29
1976 1370.00 963.50 1061.50 402.50 255.00 111.00 0.00 16.50 222.00 0.00 z 989.50 0.00 z 5391.50
1977 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1978 0.00 z 0.00 z 0.00 z 492.50 321.00 45.00 0.00 16.00 178.50 413.00 834.50 1511.50 3812.00
1979 1576.50 1102.00 883.50 578.50 0.00 z 96.00 5.50 55.50 63.50 419.00 1025.69 a 1241.00 7046.69
1980 1125.50 902.50 923.00 583.50 366.50 36.50 0.00 32.00 117.50 478.20 d 859.00 939.00 6363.20
1981 1063.62 b 950.44 a 842.68 a 464.50 357.53 a 80.00 7.50 18.00 104.50 591.58 a 807.41 a 1200.00 6487.78
1982 1362.00 1080.00 840.50 678.50 373.00 116.00 22.50 3.00 190.50 672.00 960.50 1198.00 7496.50
1983 1217.50 949.00 854.00 723.50 489.50 183.50 26.00 1.50 124.00 528.00 915.50 1318.50 7330.50
1984 1499.00 1181.00 954.50 751.00 300.00 186.00 2.50 14.50 145.00 684.00 925.00 1181.50 7824.00
1985 1245.50 847.50 i 871.00 558.50 290.00 75.00 13.00 14.50 310.50 584.00 925.00 1209.00 6096.00
1986 1177.00 871.00 700.50 573.00 385.00 47.50 15.00 10.00 293.50 612.50 895.50 1219.50 6800.00
1987 1366.50 969.50 970.00 524.50 334.50 54.50 22.50 68.00 204.00 491.50 938.50 1317.00 7261.00
1988 1543.00 1144.00 981.00 638.00 384.00 75.00 0.50 36.00 359.50 431.50 893.50 1235.50 7721.50
1989 1441.00 1112.00 758.00 474.00 329.50 137.50 0.50 56.50 218.00 588.00 911.00 1289.50 7315.50
1990 1334.50 1049.00 835.50 563.00 415.00 57.00 1.00 13.00 116.50 584.00 884.00 1460.50 7313.00
1991 1474.00 990.00 886.00 670.00 363.50 82.00 7.50 14.50 160.50 456.50 967.50 1314.00 7386.00
1992 1400.50 926.50 727.00 387.50 220.00 106.00 25.50 75.50 150.50 395.00 1060.00 1343.00 6817.00
1993 1198.50 1021.50 779.50 644.50 293.00 117.50 26.00 14.00 177.00 554.50 1031.50 1238.50 7096.00
1994 1223.00 1063.50 724.00 534.00 223.50 10.00 5.00 2.00 110.00 526.00 967.00 1181.50 6569.50
1995 1217.50 786.50 761.50 342.00 l 471.50 169.50 40.50 0.00 160.50 567.50 764.50 1049.00 5988.50
1996 1298.50 953.00 802.00 577.00 232.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3863.00
1997 0.00 z 0.00 z 0.00 z 700.50 281.00 61.00 10.50 23.00 131.50 558.00 909.00 1292.00 3966.50
1998 1082.50 958.00 891.50 671.50 300.50 185.50 7.00 1.00 44.00 l 473.50 768.50 1263.00 6602.50
1999 1134.50 915.50 652.50 649.50 398.87 a 100.50 4.50 17.50 225.00 c 458.50 775.86 a 1244.50 6577.23
Period of Record Statistics
MEAN 1317.79 1030.35 883.72 577.02 332.15 105.04 9.54 23.68 187.74 520.23 894.12 1243.97 7074.90
S.D. 143.16 132.28 107.26 91.69 79.02 50.14 11.44 21.03 69.24 88.33 104.16 124.92 541.38
SKEW 0.04 0.48 -0.05 0.16 0.03 0.21 1.67 1.60 0.31 -0.52 -0.12 0.24 -0.28
MAX 1708.44 1438.50 1127.37 794.50 519.00 222.00 50.00 108.50 374.50 697.50 1119.00 1526.00 8155.29
MIN 980.00 733.00 607.50 387.50 142.50 10.00 0.00 0.00 26.50 234.00 669.00 939.00 5782.00
NO YRS 91 90 88 90 90 92 92 91 90 90 92 89 65