RIO GRANDE RSVR, COLORADO

Monthly Total Heating Degree Days

(057050)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201301
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
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 533.50 798.50 1162.00 1418.00 3912.00
1978 1534.00 1397.00 1240.00 975.00 887.50 509.00 356.50 460.00 520.50 741.50 1243.50 1776.50 11641.00
1979 1818.50 1506.50 1498.00 1197.50 888.50 580.50 265.00 364.50 435.50 688.50 1339.00 1480.50 12062.50
1980 1559.00 1631.50 1525.00 1248.50 938.00 532.00 379.00 494.50 496.00 852.00 1087.50 1262.50 12005.50
1981 1449.00 1258.00 1387.50 903.50 765.50 387.50 306.50 386.00 535.50 883.50 1034.50 1486.50 10783.50
1982 1643.50 1407.00 1341.50 1010.00 755.50 510.50 334.00 338.00 566.00 942.00 1240.00 1749.00 11837.00
1983 1595.50 1413.00 1386.50 1269.00 931.50 561.50 318.00 243.00 407.50 729.00 1139.50 1432.00 11426.00
1984 1719.50 1479.00 1425.00 1204.00 732.50 580.00 354.00 389.00 576.50 1114.00 1172.50 1474.50 12220.50
1985 1626.50 1460.00 1370.00 1025.00 781.00 497.00 272.00 313.00 615.00 839.50 1206.50 1529.00 11534.50
1986 1452.00 1302.50 1239.00 1064.00 705.77 a 399.50 351.50 275.50 610.50 922.00 802.00 i 1566.00 9888.27
1987 1661.00 1360.50 1506.00 1057.50 836.50 437.00 308.00 334.00 570.50 738.50 1195.34 a 1536.50 11541.34
1988 1586.00 1333.50 1328.50 905.50 686.50 364.00 246.00 278.00 506.00 662.50 1141.50 1541.00 10579.00
1989 1652.50 1264.50 1047.00 800.00 610.00 423.50 188.00 376.00 491.50 784.00 1032.93 a 1381.00 10050.93
1990 1552.50 1292.50 1174.00 838.00 742.50 328.00 292.00 401.50 452.00 780.50 1226.00 1733.50 10813.00
1991 1701.50 1267.50 1386.50 1029.00 702.50 466.50 288.00 313.50 487.00 729.50 1254.50 1682.50 11308.50
1992 1668.00 1395.50 1261.00 808.00 600.00 441.50 350.50 365.50 501.00 734.00 1427.50 1667.00 11219.50
1993 1598.00 1393.00 1294.50 1048.00 675.00 432.00 250.00 0.00 z 0.00 z 823.50 1237.00 1578.00 10329.00
1994 1553.50 1463.50 1165.50 944.00 633.00 261.00 194.00 203.00 446.00 832.00 1315.50 1554.50 10565.50
1995 875.50 o 1164.50 1216.50 1072.00 811.00 467.50 291.50 193.00 454.50 729.50 667.00 i 1335.50 7735.50
1996 1591.50 1220.00 1261.50 909.50 541.50 342.00 183.00 245.50 529.00 821.50 1201.50 1562.00 10408.50
1997 1564.50 1375.00 601.50 l 1059.50 650.00 407.00 280.50 285.00 404.50 798.50 1195.00 1164.50 i 8019.50
1998 1534.00 1398.44 a 706.00 k 1079.00 666.50 464.00 194.00 285.00 363.50 823.00 1108.00 964.50 j 7915.44
1999 850.00 m 1257.50 1045.00 1080.52 a 749.17 a 428.00 232.00 312.50 466.50 666.00 923.50 1421.50 8582.18
2000 1106.00 h 1238.50 1264.00 840.50 556.00 319.50 191.74 d 215.50 406.00 768.50 1407.00 1463.50 8670.74
2001 1673.50 1376.48 c 1265.00 935.00 584.50 324.00 183.50 265.50 399.00 673.00 1022.00 1625.95 a 10327.43
2002 1503.00 778.00 k 785.00 j 731.00 609.00 237.00 143.00 239.50 454.50 818.50 662.50 l 1578.50 6314.00
2003 1414.50 1345.00 943.00 h 671.50 f 605.50 399.50 142.00 265.00 485.00 604.50 1259.50 805.00 o 6520.50
2004 1156.00 j 1504.52 d 1064.50 859.00 598.00 363.00 271.00 276.50 489.00 800.50 711.50 l 1099.50 h 6226.02
2005 1463.72 a 679.50 m 1293.50 973.50 599.50 394.50 129.50 282.50 413.50 648.00 942.00 e 1331.21 e 8471.43
2006 869.50 m 738.50 l 938.00 g 817.50 562.50 284.00 168.50 283.50 542.00 775.00 570.00 k 790.50 n 3433.00
2007 1228.00 g 671.50 l 1055.50 903.50 652.50 355.50 198.00 159.00 i 416.50 720.00 493.00 j 1054.50 j 4301.50
2008 1778.33 e 589.00 q 540.50 q 700.00 h 736.00 393.00 210.50 227.00 432.50 725.50 423.00 q 923.50 j 4502.83
2009 1027.50 i 546.50 p 639.00 o 1024.00 540.00 479.50 169.50 263.50 456.50 928.50 989.50 1776.00 6627.00
2010 1646.50 1504.00 1396.50 953.50 715.50 333.50 158.00 268.50 356.50 686.00 1215.00 1352.50 10586.00
2011 1658.50 1506.08 b 1188.69 b 897.00 751.50 354.00 153.00 195.50 392.50 760.00 1181.00 1655.92 a 10693.68
2012 1500.92 a 1505.00 1155.00 776.00 565.00 0.00 z 177.50 156.50 f 385.00 727.50 321.00 s 1580.00 8371.92
2013 1713.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1713.00
Period of Record Statistics
MEAN 1600.43 1380.00 1277.90 976.89 696.16 413.43 243.71 301.20 474.20 779.69 1174.97 1535.55 11137.05
S.D. 99.08 109.07 136.78 136.00 111.63 87.44 73.56 73.59 68.52 98.10 125.78 138.29 654.20
SKEW 0.11 0.09 -0.05 0.34 0.55 0.11 0.19 0.76 0.27 1.08 -0.14 0.02 0.09
MAX 1818.50 1631.50 1525.00 1269.00 938.00 580.50 379.00 494.50 615.00 1114.00 1427.50 1776.50 12220.50
MIN 1414.50 1164.50 1045.00 731.00 540.00 237.00 129.50 193.00 356.50 604.50 923.50 1262.50 9999.00
NO YRS 29 29 28 33 35 34 35 32 35 36 28 29 19