TWIN LAKES RSVR, COLORADO

Monthly Total Heating Degree Days

(058501)

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
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1963 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1964 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1965 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1966 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1967 0.00 z 0.00 z 0.00 z 0.00 z 725.00 462.50 207.50 336.00 452.40 e 698.50 1056.50 1540.46 e 5478.86
1968 1482.12 b 1290.00 1315.50 1074.50 789.00 421.00 274.50 350.50 583.50 815.00 1190.00 1159.00 f 9585.62
1969 1340.00 1391.50 1016.00 k 889.00 614.00 500.50 223.50 212.50 465.00 1002.50 1105.50 1381.00 9125.00
1970 935.00 n 704.50 l 1418.50 1194.00 731.00 457.00 240.50 241.50 554.50 912.50 1062.93 a 1398.00 8210.43
1971 1356.00 1307.00 1323.50 949.00 787.00 474.00 321.00 296.00 586.50 538.50 k 1147.50 1520.50 10068.00
1972 1427.50 896.00 k 1097.00 919.14 a 749.50 469.00 330.00 366.00 413.50 f 821.50 c 1333.00 1553.00 9065.64
1973 1570.00 1370.00 1396.50 1186.00 831.00 526.00 369.50 396.80 a 647.50 819.50 1045.00 1022.00 g 10157.80
1974 1613.00 1387.50 1230.59 c 1072.50 729.00 501.00 308.00 423.00 572.00 801.00 1173.50 1547.93 a 11359.02
1975 1264.00 f 944.50 j 1457.55 c 1239.00 907.02 b 233.50 m 288.50 393.00 567.00 925.50 1248.50 1302.00 8328.07
1976 1488.50 1322.00 0.00 z 1058.00 828.50 558.00 298.00 406.50 529.50 961.00 1158.00 1439.00 10047.00
1977 1565.50 1318.50 1344.00 930.00 714.50 356.50 269.00 357.50 519.00 849.00 1100.50 1400.50 10724.50
1978 1531.00 1381.00 878.50 h 601.00 j 522.50 i 270.00 h 130.50 k 223.50 h 471.50 412.50 n 740.50 j 993.00 k 3383.50
1979 1248.00 i 893.50 i 783.50 k 712.00 i 598.00 f 458.00 253.17 d 238.00 h 228.00 m 496.50 i 836.00 l 819.00 l 711.17
1980 940.00 k 816.00 k 859.50 l 762.00 i 497.50 j 224.00 i 83.50 m 155.50 j 299.00 i 543.00 j 780.50 h 702.50 k 0.00
1981 864.50 k 733.50 k 928.00 i 646.00 f 487.50 h 283.27 d 138.50 i 242.00 f 420.50 504.00 j 612.00 k 928.50 j 703.77
1982 953.00 k 900.50 j 845.50 i 1040.69 a 725.92 a 446.00 266.00 248.00 484.00 586.50 k 732.50 k 885.50 k 3210.61
1983 895.00 j 839.00 i 1301.00 1181.90 a 819.50 480.00 230.00 205.50 396.00 494.50 k 690.50 k 904.50 m 4613.90
1984 1068.00 j 840.50 k 946.00 i 783.00 i 705.54 d 471.50 238.00 299.67 d 295.00 k 705.50 j 712.00 l 835.00 m 1714.70
1985 1131.00 i 955.00 i 825.00 j 651.50 h 614.00 337.00 169.50 h 152.00 i 332.00 k 538.00 i 689.50 l 805.50 l 951.00
1986 780.00 l 785.00 i 732.50 j 864.00 665.50 328.50 260.50 152.50 j 353.50 j 548.50 i 608.50 l 918.50 j 2118.50
1987 1563.50 815.50 j 898.50 j 911.50 640.50 340.50 143.50 j 177.00 k 306.00 j 455.50 j 667.00 k 932.00 j 3456.00
1988 883.50 m 829.50 j 1313.88 a 578.50 j 654.00 313.50 214.00 222.00 340.00 k 432.00 k 599.50 m 996.00 j 2717.38
1989 978.50 k 936.50 i 1055.55 a 560.00 j 616.50 427.00 120.00 k 284.00 298.50 j 480.50 l 715.50 j 885.50 l 2383.05
1990 1010.50 j 768.00 j 810.50 i 595.50 i 731.00 299.00 144.50 j 278.48 a 244.50 l 560.50 i 695.00 j 650.00 p 1308.48
1991 1049.50 j 789.50 i 884.00 j 994.29 b 713.00 418.00 207.50 i 213.00 i 324.00 j 539.50 i 682.00 l 892.00 k 2125.29
1992 1014.50 j 822.50 k 831.50 j 539.00 j 608.00 472.00 345.50 232.50 k 468.50 705.50 1238.00 1434.50 5272.00
1993 1425.50 1294.50 1136.50 983.00 651.00 412.50 263.50 278.00 484.50 794.00 1238.50 1385.00 10346.50
1994 1384.50 1330.50 1126.50 945.50 580.50 254.00 200.50 214.00 444.00 797.00 1189.50 1335.50 9802.00
1995 1444.50 1113.50 1212.50 1069.00 825.00 457.00 319.50 179.50 215.00 p 418.00 o 453.50 p 1295.00 7915.50
1996 1017.50 i 693.50 l 688.50 n 544.50 l 560.00 352.00 159.50 163.50 j 565.50 757.00 1016.50 1356.00 4766.50
1997 1407.00 1315.50 1096.50 1025.00 662.00 355.50 220.00 248.00 361.00 805.00 1107.50 1365.50 9968.50
1998 1332.00 1239.00 1201.00 1022.00 624.50 445.00 152.50 227.50 309.00 755.50 951.50 1260.00 9519.50
1999 927.50 i 1222.00 1029.50 1010.00 742.45 a 421.00 173.94 d 255.75 a 485.00 738.50 898.00 1311.00 8287.14
2000 1298.00 1160.00 1183.00 832.50 566.50 308.79 a 161.50 167.00 400.50 734.00 1267.50 1360.12 c 9439.42
2001 1450.28 a 1265.70 a 1183.00 897.50 640.00 312.41 a 218.00 266.50 461.38 a 776.50 1027.00 1409.50 9907.78
2002 1399.00 1305.50 1315.00 789.50 643.50 261.50 69.50 163.00 388.00 817.50 1089.50 1366.50 9608.00
2003 1121.00 1221.00 1079.83 a 885.50 572.50 417.00 105.50 191.00 472.00 626.50 1108.50 1273.50 9073.83
2004 1416.50 1374.50 1009.50 918.50 632.00 393.50 125.50 p 348.50 429.00 g 803.50 1146.00 1338.50 9381.00
2005 1334.50 1245.00 1279.50 926.00 634.50 400.00 111.00 260.50 369.00 720.00 997.00 1375.50 9652.50
2006 1357.00 1240.00 1208.00 818.00 590.00 303.00 157.00 278.50 0.00 z 795.50 583.50 n 1296.32 a 8043.32
2007 1517.00 1199.50 1099.00 902.00 648.50 354.50 137.50 193.50 451.00 769.00 967.50 1473.53 a 9712.53
2008 1641.93 b 1372.50 1345.50 1090.50 744.00 379.00 176.50 232.00 439.50 712.00 942.00 1358.50 10433.93
2009 1259.00 1175.00 1076.00 918.00 573.00 438.00 219.00 324.50 500.00 919.50 985.00 1581.50 9968.50
2010 1414.50 1477.00 1318.50 966.00 733.00 310.50 184.00 261.50 416.50 557.00 i 1116.50 1163.03 b 9361.03
2011 1417.50 1336.00 1107.50 898.00 745.00 344.00 137.00 207.50 448.50 791.50 1087.00 1424.50 9944.00
2012 1327.50 1426.00 1087.00 794.50 592.50 236.50 185.00 297.00 481.55 a 810.00 995.50 1417.50 9650.55
2013 1559.50 1411.00 1334.66 c 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 48.50 z 4305.16
Period of Record Statistics
MEAN 1429.10 1303.26 1215.55 976.31 687.13 394.31 224.00 275.30 474.82 801.17 1099.65 1388.78 9944.44
S.D. 114.94 87.13 125.25 115.56 85.75 79.41 71.74 70.98 74.94 82.50 106.88 95.70 551.73
SKEW -0.31 -0.21 0.11 0.53 0.48 -0.11 -0.01 0.42 0.14 0.52 0.16 0.16 1.03
MAX 1641.93 1477.00 1457.55 1239.00 907.02 558.00 369.50 423.00 647.50 1002.50 1333.00 1581.50 11359.02
MIN 1121.00 1113.50 1009.50 789.50 560.00 236.50 69.50 163.00 309.00 626.50 898.00 1163.03 9073.83
NO YRS 29 28 31 34 42 43 37 36 32 29 30 30 16