COOKE CITY 2 W, MONTANA

Monthly Total Heating Degree Days

(241995)

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
1967 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 1240.00 1692.00 2932.00
1968 1585.50 1241.50 1190.50 1128.50 804.50 523.50 260.00 447.00 597.00 898.00 1327.00 1644.00 11647.00
1969 1501.00 1325.00 1427.50 889.00 669.50 586.50 339.00 244.00 471.50 1057.62 a 1242.50 1504.00 11257.12
1970 1495.00 1201.50 1383.00 1250.50 775.50 445.00 279.00 225.00 705.00 1026.50 1197.50 1542.50 11526.00
1971 1513.00 1353.00 1351.00 1060.50 719.50 474.50 333.50 171.50 681.00 955.50 1251.50 1620.50 11485.00
1972 1639.50 1321.50 1142.00 1001.50 737.50 449.00 373.50 321.00 683.50 913.00 1294.00 1694.00 11570.00
1973 1634.50 1254.00 1289.50 1133.00 0.00 z 0.00 z 303.50 298.12 a 583.00 832.50 1246.00 1470.00 10044.12
1974 1613.50 1298.50 1301.00 958.50 859.50 421.61 b 231.00 407.00 557.50 817.00 1263.50 1633.00 11361.61
1975 1685.50 1415.00 1389.50 1191.50 888.67 a 617.59 a 222.68 a 461.50 589.50 929.50 1385.00 1448.50 12224.44
1976 1594.00 1380.50 1473.02 a 990.52 a 710.00 547.00 252.00 384.00 511.00 934.50 1174.50 1588.50 11539.53
1977 1650.23 a 1254.50 1384.50 882.50 747.50 350.00 279.50 395.50 567.50 845.00 1263.50 1481.00 11101.23
1978 1480.25 a 1301.00 1164.50 929.00 800.00 501.00 328.50 404.50 574.80 e 844.75 e 1358.65 d 1502.00 g 9686.95
1979 1945.25 c 1305.63 a 1294.00 1013.04 b 774.00 495.58 d 246.00 332.00 458.50 0.00 z 0.00 z 1471.90 e 9335.90
1980 571.50 v 1293.50 1072.50 f 339.50 q 705.77 a 0.00 z 0.00 z 396.05 b 0.00 z 887.00 0.00 z 0.00 z 3282.32
1981 1531.40 a 0.00 z 1175.42 a 653.00 i 737.59 b 513.62 a 268.09 d 187.00 h 437.14 b 954.00 0.00 z 1420.63 e 7037.89
1982 1617.74 d 1403.63 a 1236.50 1226.11 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 5483.98
1983 0.00 z 0.00 z 1206.50 1122.50 865.50 557.50 340.00 222.50 620.50 867.50 1236.50 1231.00 i 7039.00
1984 1634.50 1465.00 1263.00 1112.50 808.58 a 559.00 263.00 295.00 711.00 1090.50 1352.59 a 1434.00 f 10554.67
1985 1730.00 1587.00 1440.00 946.50 664.00 463.00 233.00 424.00 725.00 993.00 1415.50 1657.00 12278.00
1986 1486.50 1262.50 1042.50 966.50 771.50 342.50 382.00 280.00 692.00 870.50 1349.50 1704.00 11150.00
1987 1681.00 1296.50 1276.50 837.50 591.50 206.50 p 418.50 402.00 348.00 k 855.50 607.00 l 697.50 q 7359.00
1988 518.50 v 364.50 u 1340.50 940.50 680.00 249.00 175.50 275.00 561.50 710.50 1301.50 887.00 n 6234.00
1989 704.00 r 367.00 u 591.00 q 297.50 u 486.00 j 496.50 160.00 337.00 564.00 924.00 1226.00 1610.00 5317.50
1990 1500.00 1402.00 1198.50 878.50 821.00 475.50 229.50 284.00 379.00 995.00 1179.50 1936.50 11279.00
1991 1658.00 1141.50 1289.00 1049.00 780.00 0.00 z 0.00 z 0.00 z 520.00 912.50 706.50 o 1652.50 9002.50
1992 1598.50 1196.50 1080.00 888.00 606.50 460.50 398.00 318.50 601.00 811.50 1385.50 1661.00 11005.50
1993 1628.00 1396.50 1175.50 979.00 626.50 534.50 476.50 412.50 609.00 879.50 1454.50 1559.00 11731.00
1994 1438.00 1442.54 b 1240.50 955.50 599.50 416.00 281.00 225.00 456.00 386.00 r 1525.50 1452.87 a 10032.41
1995 1627.50 a 1162.50 1308.50 1034.50 804.00 508.50 309.50 293.00 508.00 1010.50 1186.50 1568.00 11321.00
1996 1564.98 a 1449.50 1329.00 998.50 856.50 400.00 203.00 277.00 618.00 922.00 1226.50 1479.00 11323.98
1997 0.00 z 1358.00 1237.50 1121.00 733.50 368.00 320.50 291.00 473.00 931.00 1273.00 1642.50 9749.00
1998 1406.00 1262.50 1230.00 900.50 630.00 607.50 154.50 267.50 422.50 860.50 1153.00 1588.00 10482.50
1999 1461.50 1261.50 1253.50 1038.00 813.00 518.50 312.50 299.67 a 664.50 893.00 1059.00 1496.00 11070.67
2000 1503.50 1225.50 1227.50 863.00 712.50 463.00 235.00 292.50 622.50 889.50 1549.00 1593.00 11176.50
2001 1656.00 1382.00 1175.50 965.00 680.50 432.00 229.00 261.00 494.50 930.00 1143.00 1604.00 10952.50
2002 1563.50 1397.50 1395.00 1012.00 783.00 442.00 192.00 416.00 578.50 1090.00 1327.00 1451.50 11648.00
2003 1373.30 a 1406.74 a 1232.00 922.00 746.00 525.00 170.00 222.00 609.00 831.50 1409.50 1456.50 10903.54
2004 1592.00 1396.00 1114.00 883.00 781.50 520.00 323.00 414.00 631.50 904.50 1319.50 1407.00 11286.00
2005 1506.50 1335.00 1214.50 973.50 772.50 544.50 259.00 359.00 617.00 862.00 1315.50 1625.43 a 11384.43
2006 1414.50 1408.50 1305.00 0.00 z 680.50 386.50 187.00 379.23 a 257.50 n 924.00 1180.50 1504.02 a 9369.75
2007 1699.00 1213.00 1035.50 888.50 613.00 375.50 69.50 234.50 456.00 f 876.50 1180.00 1520.00 9705.00
2008 1658.50 1307.50 1365.00 1121.50 780.50 506.50 262.00 303.50 567.50 933.50 1167.00 1647.28 b 11620.28
2009 1477.09 d 1276.00 1380.00 1073.50 754.00 437.50 h 302.50 352.50 426.00 1101.00 1203.50 1807.50 11153.59
2010 1517.00 1348.50 1189.50 1002.00 910.00 520.50 298.00 342.00 514.00 773.00 1348.00 1452.00 11214.50
2011 1539.00 1455.00 1228.00 1097.50 891.50 560.00 270.50 281.50 474.00 811.17 a 1300.50 1621.00 11529.67
2012 1458.00 1396.50 1112.50 856.00 770.00 406.03 a 188.50 275.00 483.00 943.00 1129.50 1479.50 10497.54
2013 1629.50 1343.50 1267.90 a 29.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 61.00 z 4240.90
Period of Record Statistics
MEAN 1572.88 1331.52 1258.06 1001.96 748.97 475.97 270.46 321.99 563.99 911.70 1278.52 1573.99 11341.66
S.D. 106.64 91.81 104.21 105.57 82.72 78.82 78.56 71.63 88.52 84.22 106.75 111.64 403.20
SKEW 0.78 0.17 -0.07 0.50 -0.13 -0.58 0.15 0.12 -0.08 0.38 0.50 0.88 0.12
MAX 1945.25 1587.00 1473.02 1250.50 910.00 617.59 476.50 461.50 725.00 1101.00 1549.00 1936.50 12278.00
MIN 1373.30 1141.50 1035.50 837.50 591.50 249.00 69.50 171.50 379.00 710.50 1059.00 1407.00 9999.00
NO YRS 41 42 44 41 42 39 42 42 40 42 40 39 28