STEPHENSON 8 WNW, MICHIGAN

Monthly Total Heating Degree Days

(207867)

Base Temperature = 65 F

File last updated on Oct 29, 2012
*** Note *** Provisional Data *** After Year/Month 200810
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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 23.50 48.50 155.00 585.50 823.50 1315.00 2951.00
1949 1356.50 1292.00 1127.50 628.93 b 378.00 68.00 20.00 45.50 293.50 454.50 963.50 1326.50 7954.43
1950 1557.50 1360.00 1303.50 943.97 a 428.50 143.00 66.50 162.50 256.00 438.00 1081.55 a 1518.00 9259.02
1951 1591.50 1289.00 1157.00 674.00 248.50 180.00 a 42.00 126.00 290.00 557.00 1165.00 c 1397.50 8717.50
1952 1502.50 1230.00 1212.50 557.59 a 345.50 84.83 a 32.00 65.50 241.55 a 717.13 a 863.50 1174.50 8027.10
1953 1341.50 1284.00 1069.00 759.50 380.50 114.83 a 41.50 37.20 a 247.24 a 420.50 795.00 1257.00 7747.77
1954 1557.50 1048.00 1191.00 648.00 518.50 100.00 46.00 75.50 274.66 a 565.50 859.00 1276.17 a 8159.82
1955 1532.00 1334.50 1229.50 495.52 a 298.00 80.50 13.00 28.00 225.00 494.00 1069.50 1494.50 8294.02
1956 1423.00 1369.73 a 1275.13 a 798.50 422.63 a 114.00 74.00 69.00 369.00 392.50 939.83 a 1333.50 8580.83
1957 1720.50 1261.50 1146.00 668.50 403.50 123.21 b 39.50 80.00 300.00 598.50 930.00 a 1304.00 8575.21
1958 1385.50 1368.00 1045.50 663.50 418.50 238.00 60.97 a 76.50 234.83 a 500.13 a 880.00 1613.50 8484.93
1959 1749.00 1479.00 1232.00 712.00 268.00 114.00 48.50 17.50 218.00 666.50 1184.00 1156.00 8844.50
1960 1442.00 1300.50 1411.00 663.50 403.50 141.43 b 65.00 42.50 229.00 554.50 832.00 1443.50 8528.43
1961 1550.00 a 1144.50 1039.57 b 746.00 438.00 135.50 43.50 55.00 241.00 538.50 946.00 1459.50 8337.07
1962 1660.00 1455.00 1168.00 725.50 281.50 130.00 90.00 70.00 321.50 492.00 935.00 1385.70 a 8714.20
1963 1837.00 1573.50 1135.12 a 650.00 443.00 110.50 46.00 93.50 252.00 317.00 804.50 1550.50 8812.62
1964 1352.50 1271.00 1167.50 666.50 233.50 169.00 38.00 142.00 297.00 622.00 885.50 1443.00 8287.50
1965 1597.00 1429.56 a 1291.50 769.00 276.50 156.50 92.00 98.00 316.50 536.50 949.50 1145.00 8657.56
1966 1678.00 1219.00 1012.50 753.50 498.50 109.00 11.50 97.50 259.50 615.00 956.50 1357.00 8567.50
1967 1411.50 1499.50 1183.50 686.00 521.50 83.00 72.50 120.50 268.00 589.50 1048.00 1339.00 8822.50
1968 1580.00 1409.00 951.00 628.50 425.50 132.00 52.50 109.50 160.50 474.00 921.00 1318.00 8161.50
1969 1503.00 1244.00 1232.00 617.00 345.50 257.00 56.00 14.50 241.00 615.50 964.00 1307.50 8397.00
1970 1684.00 1365.00 1215.00 594.50 372.00 94.00 23.50 49.00 233.00 482.00 939.00 1366.00 8417.00
1971 1695.50 1339.00 1257.50 700.00 437.00 65.50 68.50 99.00 214.50 353.00 928.50 1307.50 8465.50
1972 1687.50 1498.50 1271.50 825.00 266.00 133.00 63.50 66.00 268.50 650.50 960.50 1475.50 9166.00
1973 1395.50 1242.50 848.00 699.50 445.00 61.00 21.00 34.50 259.50 382.00 928.50 1388.50 7705.50
1974 1518.00 1388.50 1136.00 618.00 441.00 164.50 35.50 57.00 371.00 589.00 894.50 1215.00 8428.00
1975 1456.50 1274.00 1243.00 843.00 212.00 99.00 38.50 37.50 331.00 481.50 795.00 1360.50 8171.50
1976 1641.00 1162.00 1135.00 595.00 429.50 38.00 21.00 83.00 295.00 716.00 1143.50 1690.00 8949.00
1977 1810.00 1271.00 959.50 559.50 168.50 153.50 21.50 119.50 212.50 575.00 957.93 a 1438.50 8246.93
1978 1631.00 1420.50 1193.00 765.50 310.50 148.00 71.00 42.00 177.50 580.50 965.00 1495.00 8799.50
1979 1768.00 1532.00 1115.50 762.50 416.43 a 111.00 23.00 66.50 209.50 634.50 988.00 1182.50 8809.43
1980 1502.50 1390.00 1210.00 605.50 237.00 135.50 17.00 24.50 246.00 687.50 917.00 1437.00 8409.50
1981 1543.50 1199.50 957.50 632.00 385.00 85.00 51.50 37.50 293.00 676.50 849.00 1330.50 8040.50
1982 1808.50 1401.00 1154.50 810.00 190.50 254.00 17.50 135.50 269.00 496.00 953.50 1170.50 8660.50
1983 1382.00 1078.00 1061.00 745.00 513.00 129.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4908.00
1984 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 31.52 a 308.50 526.00 966.50 1386.00 3218.52
1985 1678.00 1436.50 1012.00 639.00 280.00 193.00 61.00 68.00 277.00 603.00 1120.00 1795.86 b 9163.36
1986 1609.00 1427.00 1121.00 537.00 290.50 174.00 32.50 137.00 254.50 617.50 1099.00 1343.00 8642.00
1987 1429.50 1167.00 999.50 570.00 339.00 64.50 27.00 i 74.50 222.50 755.50 892.00 1246.00 7760.00
1988 1727.73 a 1567.50 1191.00 688.00 294.00 110.00 26.00 61.50 243.50 757.00 886.50 1431.00 8983.73
1989 1447.50 1542.50 1338.00 726.96 b 397.50 168.00 25.50 65.50 280.50 586.50 1118.00 1765.00 9461.46
1990 1357.50 1344.00 1075.00 608.50 475.50 119.00 66.50 68.00 240.50 660.00 849.50 1405.00 8269.00
1991 1734.00 1264.00 1075.50 589.50 281.50 50.00 52.00 44.00 328.00 649.00 1111.50 1345.00 8524.00
1992 1411.50 1277.00 1172.50 789.50 390.50 188.50 129.50 151.50 306.50 644.00 1042.00 1361.00 8864.00
1993 1594.00 1391.50 1119.00 798.00 387.50 175.00 30.00 56.00 396.50 709.00 1051.50 1321.50 9029.50
1994 1877.00 1546.00 1084.00 714.50 402.00 103.50 50.00 113.50 203.50 534.50 867.50 1200.00 8696.00
1995 1440.50 1344.00 1100.00 875.50 413.00 76.50 42.50 12.50 342.00 550.00 1216.50 1551.00 8964.00
1996 1735.50 1544.50 1372.50 859.50 504.50 132.00 83.00 46.00 240.00 634.50 1110.50 1393.00 9655.50
1997 1611.00 1292.00 1235.50 774.00 583.00 90.00 77.00 147.00 229.50 617.00 1032.00 1183.00 8871.00
1998 1420.00 987.50 1072.50 623.00 214.50 157.50 43.50 27.00 178.50 0.00 z 0.00 z 1259.50 5983.50
1999 1620.55 b 1171.00 1072.50 631.03 a 303.50 114.50 5.50 k 57.00 f 261.67 c 626.20 a 769.44 c 1334.00 7904.40
2000 1562.06 d 1234.65 b 865.42 a 748.97 a 322.50 136.50 75.00 43.00 262.50 471.50 913.97 a 1610.50 8246.55
2001 1335.58 a 1346.00 1150.50 579.00 284.00 152.50 60.00 16.00 277.50 609.00 712.00 1108.50 7630.58
2002 1262.00 1122.50 1268.00 715.00 534.50 103.00 18.00 29.50 176.50 704.00 1014.00 1279.00 8226.00
2003 1569.00 1216.00 f 1182.50 773.00 400.00 152.50 34.50 20.00 211.00 604.00 944.50 1205.50 7096.50
2004 1670.50 1322.50 1058.50 690.00 461.00 173.00 71.00 140.50 124.50 567.50 871.00 1392.00 8542.00
2005 0.00 z 1154.50 1262.50 615.50 437.50 40.50 36.50 0.00 z 0.00 z 505.00 920.00 1391.50 6363.50
2006 1223.00 1363.00 1071.50 0.00 z 332.00 121.00 5.50 m 33.50 i 266.00 683.00 833.00 1188.00 7080.50
2007 1367.50 1478.81 a 1051.93 a 730.50 309.00 83.50 64.50 0.00 z 0.00 z 423.00 984.00 1455.00 7947.75
2008 1538.00 1592.50 1308.50 464.00 i 484.50 101.00 16.50 h 61.50 172.50 g 120.00 y 0.00 z 0.00 z 5086.00
Period of Record Statistics
MEAN 1552.97 1333.44 1145.71 692.74 371.56 126.01 47.74 70.36 257.93 570.43 954.16 1368.17 8559.37
S.D. 152.95 138.24 116.48 92.63 95.48 47.23 23.88 40.13 53.73 100.14 110.08 146.33 426.16
SKEW 0.03 -0.16 -0.23 0.31 -0.08 0.62 0.77 0.63 0.13 -0.39 0.37 0.75 0.13
MAX 1877.00 1592.50 1411.00 943.97 583.00 257.00 129.50 162.50 396.50 757.00 1216.50 1795.86 9655.50
MIN 1223.00 987.50 848.00 495.52 168.50 38.00 11.50 12.50 124.50 317.00 712.00 1108.50 7630.58
NO YRS 58 58 59 57 59 59 55 56 57 58 58 59 50