SILVERTON, COLORADO

Monthly Total Heating Degree Days

(057656)

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
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 356.50 342.50 520.50 826.00 1003.50 1384.00 4433.00
1905 1388.00 1211.00 1096.50 958.00 783.50 445.50 350.50 299.50 478.00 827.00 1093.50 1625.43 a 10556.43
1906 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 400.00 428.50 606.50 0.00 z 1247.14 b 1553.00 4235.14
1907 1583.50 1249.50 1285.00 1105.96 d 1026.00 650.00 328.27 c 458.00 627.50 901.58 a 1213.89 c 1503.50 11932.70
1908 1547.50 1369.50 1235.50 941.00 834.13 d 580.50 343.00 494.50 649.00 1022.50 1269.50 1652.50 11939.13
1909 1552.50 1453.50 1462.00 1174.50 838.50 460.00 260.92 a 311.00 560.50 824.00 1158.00 1706.00 11761.42
1910 1453.68 c 1414.00 1115.50 917.50 691.50 443.00 178.00 l 377.50 566.00 864.00 1061.50 1374.50 10278.68
1911 1303.00 1265.00 1179.00 946.50 715.00 474.00 375.00 376.50 551.00 857.00 1254.50 1529.00 10825.50
1912 1559.50 1367.50 1281.50 1329.00 1031.55 b 525.00 386.50 407.50 699.00 922.50 1164.31 a 1576.50 12250.36
1913 1608.50 1357.50 1394.48 a 964.50 720.00 526.00 364.00 348.00 599.50 937.50 1088.00 1598.00 11505.98
1914 1481.50 1101.50 f 1129.50 834.23 d 627.50 375.50 212.98 d 0.00 z 449.50 787.00 937.00 1560.50 8395.21
1915 1563.00 1315.50 1288.50 782.50 818.50 312.50 o 225.00 f 376.50 514.00 770.00 1080.50 976.00 i 8509.00
1916 1396.79 e 1237.50 1145.50 930.00 773.00 518.00 366.50 430.50 612.50 882.50 1158.62 a 1570.00 11021.41
1917 1532.00 1298.00 1470.00 602.50 n 869.00 498.50 278.00 412.50 520.50 832.00 999.50 1272.00 9982.00
1918 1550.50 1265.00 1211.50 1078.00 717.00 314.00 321.00 344.00 498.00 714.50 1244.00 1415.00 10672.50
1919 1526.00 1462.50 1335.00 900.00 652.50 479.50 241.00 318.50 460.00 934.00 1193.50 1413.00 10915.50
1920 1334.50 1243.50 1349.00 1100.00 406.00 i 399.00 286.50 354.50 406.00 f 893.00 1207.00 1548.50 9715.50
1921 1456.50 1293.50 1203.00 1133.50 767.00 482.00 310.00 352.50 517.50 751.00 1067.00 1313.50 10647.00
1922 1700.50 1319.50 1203.50 1001.50 721.50 371.50 184.50 245.50 421.00 689.00 1223.50 1454.50 10536.00
1923 1405.00 1383.50 1375.00 1036.00 687.50 317.00 i 239.00 352.50 592.50 902.50 1151.50 1397.58 a 10522.58
1924 1631.50 1225.50 1418.50 997.50 813.00 360.50 327.50 447.95 a 661.00 1007.50 1328.50 1588.50 11807.45
1925 1659.00 1226.00 1090.50 795.50 574.00 404.48 a 300.50 361.00 432.50 840.00 1228.50 1373.50 10285.48
1926 1536.50 1173.50 1140.50 812.59 a 695.95 a 0.00 z 0.00 z 0.00 z 464.00 726.00 1083.00 1479.50 9111.54
1927 1361.50 1114.00 1159.50 870.00 575.00 443.50 300.00 413.00 574.50 866.00 1146.50 1539.50 10363.00
1928 1342.50 1223.00 1066.50 1013.00 705.50 413.00 231.00 400.50 526.00 748.00 1146.00 1417.22 a 10232.22
1929 1398.50 1319.00 1230.00 1078.50 694.00 378.50 218.50 292.00 560.00 852.00 1183.50 1333.50 10538.00
1930 1518.50 1055.00 1181.00 859.50 863.00 429.50 315.00 376.00 556.50 849.50 1188.50 1555.54 c 10747.54
1931 1461.17 e 1208.00 1263.00 881.50 773.50 392.50 272.50 346.00 528.50 773.00 1211.00 1484.00 10594.67
1932 1651.00 1138.50 1267.50 915.50 736.50 566.00 296.50 322.50 559.00 835.50 1047.00 1552.50 10888.00
1933 1549.50 1457.00 1175.50 1069.50 817.50 391.50 260.00 337.50 442.50 738.50 1003.50 1268.50 10511.00
1934 1378.50 1094.00 1038.00 836.00 576.00 484.50 259.50 293.50 571.00 739.00 1112.00 1419.00 9801.00
1935 1399.00 1227.00 1289.50 976.50 776.50 475.00 305.00 335.50 517.00 859.50 1156.50 1408.50 10725.50
1936 1506.00 1304.50 1193.00 924.00 691.00 417.50 333.50 347.00 551.00 909.00 1137.50 1447.50 10761.50
1937 1789.00 1386.50 1317.50 983.00 704.00 500.50 374.50 342.50 525.00 824.00 1143.00 1371.50 11261.00
1938 1476.50 1293.50 1265.32 a 958.00 786.50 498.50 393.00 367.00 523.50 835.50 1288.00 1392.00 11077.32
1939 1524.00 1545.70 a 1268.00 876.00 708.00 510.00 323.50 393.00 474.00 919.00 1051.00 1246.50 10838.70
1940 1507.00 1313.50 1206.00 910.00 644.00 417.50 294.50 332.50 485.50 763.00 1211.50 1354.00 10439.00
1941 1512.50 1173.50 1212.50 1048.50 668.00 546.00 318.00 356.50 569.50 888.50 1161.50 1415.00 10870.00
1942 1504.50 1443.50 1409.00 914.50 799.50 480.50 353.50 362.50 500.50 805.50 1025.50 1380.50 10979.50
1943 1412.50 1200.00 1263.00 758.00 644.50 411.50 273.00 238.00 482.50 836.48 a 1176.00 1432.50 10127.98
1944 1481.50 1380.50 1381.50 1098.00 749.00 494.00 370.00 316.00 486.50 752.00 1199.50 1460.00 11168.50
1945 1468.50 1199.50 1299.00 1077.00 674.50 514.50 313.00 263.00 473.50 764.00 1213.50 1540.50 10800.50
1946 963.50 l 1301.00 1226.00 832.50 790.50 443.50 311.50 167.00 r 517.00 902.50 1242.50 1342.00 8909.00
1947 1558.50 1226.00 1302.50 1022.00 674.50 553.00 286.50 328.00 485.50 763.00 1258.50 1518.00 10976.00
1948 1399.50 1303.50 1452.50 958.50 679.50 502.50 347.72 a 372.00 460.00 807.50 1291.00 1448.00 11022.22
1949 1624.50 1430.00 1237.00 921.50 722.50 510.50 317.48 b 365.50 197.50 q 566.00 n 937.50 1458.50 9524.98
1950 1535.00 1210.00 1237.00 861.00 779.00 468.50 365.50 447.00 576.50 654.00 1047.50 1324.00 10505.00
1951 1500.00 1241.00 1321.50 987.00 723.00 548.50 261.00 361.67 a 517.24 a 839.50 1267.50 1509.00 11076.91
1952 1537.00 1461.00 1481.00 980.00 716.10 a 422.50 327.50 321.50 509.50 724.00 1237.50 1506.00 11223.60
1953 1330.50 1321.00 1203.00 1032.50 792.88 e 270.00 h 238.81 d 362.00 518.50 821.50 1099.50 1483.00 10203.20
1954 1380.00 1142.00 1315.78 d 774.23 d 635.00 437.50 262.50 374.50 499.50 708.50 993.50 1451.50 9974.51
1955 1594.50 1451.50 1307.50 1059.00 738.00 522.50 0.00 z 273.50 486.50 765.00 1187.50 1362.45 a 10747.95
1956 1344.00 1469.00 1273.00 959.50 634.50 379.50 0.00 z 432.50 440.50 836.50 1260.50 1459.50 10489.00
1957 1476.50 1099.50 1253.50 1037.00 836.00 0.00 z 0.00 z 327.00 0.00 z 834.00 0.00 z 1449.50 8313.00
1958 1536.50 1239.00 1420.50 1093.50 664.29 c 268.50 h 322.50 269.50 107.00 u 0.00 z 0.00 z 1239.00 7784.79
1959 1391.00 1319.00 1253.00 877.50 651.00 334.50 237.00 323.00 497.00 844.50 1101.00 1314.50 10143.00
1960 1602.50 1481.50 1189.00 919.00 675.50 405.00 274.00 289.50 398.50 784.50 1069.00 1467.50 10555.50
1961 1457.00 1218.00 1182.00 1014.50 657.00 368.00 317.00 278.50 587.50 826.00 1311.00 1532.50 10749.00
1962 1550.50 1204.00 1451.50 796.00 714.00 470.50 353.50 376.50 504.50 678.50 979.00 1302.50 10381.00
1963 1506.50 1204.50 1334.50 893.00 590.00 455.00 231.00 293.00 387.00 645.50 1042.00 1406.00 9988.00
1964 1542.00 1484.50 1417.50 1001.00 676.50 457.50 237.50 353.50 484.00 714.00 1137.00 1525.72 a 11030.72
1965 1400.50 1347.00 1362.00 909.50 728.50 499.00 290.00 365.00 589.00 686.13 a 932.00 1388.00 10496.63
1966 1652.50 1472.00 1188.50 898.00 605.50 417.00 223.50 305.00 477.00 765.50 1031.00 1454.00 10489.50
1967 1503.50 b 1314.00 1114.00 937.50 705.00 513.00 236.00 344.00 449.50 723.50 994.50 1463.50 10298.00
1968 1502.50 1260.50 1219.00 1047.50 722.50 399.00 310.50 394.50 544.50 681.50 1161.50 1510.00 10753.50
1969 1402.50 1376.50 1429.50 870.50 591.00 510.50 250.00 239.00 456.50 959.50 1178.50 1329.00 10593.00
1970 1492.50 1151.50 1335.50 1130.50 619.00 451.00 301.50 298.50 553.00 927.00 1114.50 1488.50 10863.00
1971 1421.00 1286.50 1240.50 899.50 735.00 428.50 281.00 278.50 579.50 848.50 1219.00 1516.50 10734.00
1972 1505.00 1279.50 1035.00 861.00 694.50 392.50 292.50 330.00 509.00 715.50 1301.00 1619.50 10535.00
1973 1637.50 1296.50 1308.00 1126.50 729.50 439.50 288.50 300.50 540.00 744.50 984.50 1412.50 10808.00
1974 1543.50 1323.50 1130.00 993.00 610.50 388.50 311.50 395.00 522.00 757.00 1233.50 1597.00 10805.00
1975 1526.50 1352.50 1276.00 1116.50 846.00 503.50 326.00 416.00 537.00 841.50 1126.00 1476.00 11343.50
1976 1534.50 1272.50 1342.50 972.50 674.50 506.50 288.50 430.50 539.00 899.00 1117.50 679.00 p 9577.50
1977 1572.22 a 1213.00 1305.00 881.90 a 727.00 417.00 375.00 409.00 0.00 z 0.00 z 0.00 z 0.00 z 6900.11
1978 0.00 z 1389.50 d 875.00 g 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 1389.50
1979 0.00 z 1334.67 a 1308.72 a 837.50 f 517.50 g 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1345.00 c 1333.00 5321.38
1980 1368.65 a 1247.56 c 1034.00 g 554.00 o 569.50 g 388.80 e 221.77 e 134.00 n 190.50 s 446.00 n 442.50 q 1179.66 c 4406.44
1981 0.00 z 817.00 i 903.00 h 575.00 j 388.00 m 244.50 i 0.00 z 90.00 y 525.00 786.88 a 964.00 1490.00 3765.88
1982 1603.50 1414.00 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 3017.50
1983 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 1184.50 1520.00 2704.50
1984 1747.50 1444.50 1369.00 1126.00 663.00 519.50 279.00 321.00 506.50 1067.00 1254.00 1536.00 11833.00
1985 1647.50 1484.00 1279.50 944.50 692.50 450.00 311.00 388.00 644.00 860.50 1286.90 a 1558.00 11546.40
1986 1471.00 1232.50 1162.50 935.00 751.50 444.50 389.50 341.00 628.00 938.50 1243.00 1540.00 11077.00
1987 1627.50 1301.00 1425.50 952.50 718.00 469.00 361.00 406.50 625.50 813.50 1219.50 1561.50 11481.00
1988 1674.00 1362.50 1349.50 935.00 761.00 410.00 335.00 301.00 603.00 773.50 1228.50 1602.50 11335.50
1989 1726.50 1351.50 1144.50 833.00 682.50 508.00 284.00 427.50 545.00 896.50 1160.00 c 1507.50 11066.50
1990 1611.50 1366.50 1186.50 872.00 776.00 451.00 325.00 410.00 482.50 854.00 1209.50 1705.50 11250.00
1991 1712.00 1287.50 1339.50 1077.00 712.50 459.50 292.50 308.50 482.50 780.50 1196.00 1578.42 a 11226.42
1992 1574.00 1308.50 1188.50 790.50 618.50 480.50 346.00 367.00 523.00 744.50 1382.00 1624.00 10947.00
1993 1521.00 1327.50 1219.50 1014.00 700.50 467.50 301.50 350.00 565.00 860.50 1290.50 1585.00 11202.50
1994 1580.00 1449.50 1167.50 955.00 666.50 330.50 271.50 243.00 500.50 885.00 1339.50 1531.50 10920.00
1995 1563.00 1142.50 1242.00 1069.50 839.50 521.00 347.50 228.00 500.50 846.00 1064.50 1377.50 10741.50
1996 1519.00 1241.00 1273.50 970.50 576.50 389.00 224.50 307.00 586.00 913.00 1214.00 1556.00 10770.00
1997 1540.00 1344.50 1183.50 1054.50 694.00 450.50 283.50 315.00 440.00 869.00 1173.50 1569.00 10917.00
1998 1526.00 1357.50 1328.87 a 1091.00 691.50 495.50 206.50 301.50 418.50 850.00 1143.50 1457.00 10867.37
1999 1385.00 1210.00 1002.00 1010.69 a 738.32 a 470.00 243.00 325.00 533.50 747.50 958.00 1432.00 10055.01
2000 1416.50 1273.00 1256.00 877.50 589.50 361.00 231.00 240.00 465.50 821.00 1460.00 1454.00 10445.00
2001 1581.00 1253.50 1120.50 929.00 620.00 400.00 226.00 293.50 445.50 760.00 1064.50 1592.00 10285.50
2002 1486.00 1344.50 1281.00 759.50 663.50 318.50 152.50 301.00 493.50 886.50 1229.50 1545.00 10461.00
2003 1453.00 1320.50 1197.00 936.50 613.00 421.00 177.50 256.50 494.00 652.00 1231.00 1455.50 10207.50
2004 1581.00 1427.00 1103.00 849.00 653.50 421.50 325.50 366.00 557.00 851.00 1089.64 b 1420.63 e 10644.78
2005 1399.50 1268.50 943.00 h 954.50 658.00 465.50 253.50 350.00 558.50 764.00 1074.00 0.00 z 7746.00
2006 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 318.00 616.50 862.50 1125.50 1448.00 4370.50
2007 1632.00 1283.50 1170.00 912.00 691.00 402.50 212.00 231.50 485.00 834.00 1042.00 1663.00 10558.50
2008 1814.00 0.00 z 1380.00 1109.00 772.50 438.50 258.00 294.50 540.00 817.00 1061.50 1540.50 10025.50
2009 1469.50 1359.00 1244.50 1084.50 583.00 491.50 276.00 354.50 513.00 951.00 1128.50 1812.00 11267.00
2010 1578.50 1446.50 1358.00 1023.00 757.00 380.50 223.00 303.50 441.50 763.00 1295.50 1331.00 10901.00
2011 1630.08 a 1464.00 1213.00 990.00 820.00 417.00 199.00 263.50 475.50 848.00 1214.00 1540.50 11074.58
2012 1471.50 1449.48 a 1199.50 826.00 0.00 z 0.00 z 199.50 269.00 490.50 779.00 1104.00 1545.00 9333.48
2013 1623.50 1529.50 260.50 y 31.50 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 3153.00
Period of Record Statistics
MEAN 1520.64 1310.43 1257.32 962.93 714.13 451.47 291.32 341.10 522.80 820.43 1156.20 1474.29 10837.13
S.D. 103.53 104.55 104.42 105.06 85.18 61.15 54.59 56.26 60.07 81.94 106.41 109.33 481.50
SKEW 0.26 0.03 0.04 0.36 0.98 0.18 -0.15 0.14 0.36 0.20 -0.04 -0.02 0.52
MAX 1814.00 1545.70 1481.00 1329.00 1031.55 650.00 400.00 494.50 699.00 1067.00 1460.00 1812.00 12250.36
MIN 1303.00 1055.00 1002.00 758.00 574.00 314.00 152.50 228.00 387.00 645.50 932.00 1179.66 9801.00
NO YRS 102 103 100 99 98 94 97 100 99 100 103 103 81