date! ,

Monthly Total Heating Degree Days

(a vali)

Base Temperature = 65 F

File last updated on Apr 6, 2013
*** Note *** Provisional Data *** After Year/Month 200211
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
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 402.41 a 589.50 989.00 1555.37 e 3536.28
1963 1633.00 g 1671.70 a 1186.50 722.50 478.95 a 148.39 b 49.27 c 60.00 p 265.50 0.00 z 0.00 z 0.00 z 4522.81
1964 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 62.53 b 226.50 400.00 691.00 1117.50 d 1839.33 a 4336.87
1965 1961.50 1711.00 1624.50 849.50 407.00 261.50 80.00 l 203.00 530.50 631.50 1156.50 1367.50 10704.00
1966 2099.50 1571.00 1181.21 b 933.50 552.50 164.50 44.50 152.93 a 380.00 0.00 z 984.50 f 1656.50 8736.14
1967 1767.00 1753.36 c 1278.00 881.90 a 693.50 264.50 139.50 186.57 d 396.50 0.00 z 1232.00 0.00 z 8592.83
1968 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 41.00 z 192.64 c 332.50 596.23 a 1132.76 a 1694.00 3948.13
1969 1853.00 1498.56 c 1446.31 b 748.89 c 454.67 a 405.58 d 132.94 e 81.38 c 346.61 b 826.15 a 837.50 g 1532.43 a 9326.51
1970 1997.95 a 1609.48 a 1505.00 853.50 543.61 c 172.00 67.34 b 144.50 358.50 638.60 a 1215.00 1704.50 10809.98
1971 2100.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 345.00 c 558.00 b 1141.50 1604.00 5748.50
1972 2049.50 1732.50 1448.50 886.00 293.00 164.50 116.77 a 126.58 a 390.00 b 749.50 1151.00 1811.90 b 10919.75
1973 1646.00 1426.96 a 937.50 776.50 457.50 125.50 89.00 57.50 377.50 507.00 1118.00 1644.00 9162.96
1974 1850.18 a 1529.00 1348.00 757.50 538.50 203.50 35.50 153.50 455.00 639.12 a 1061.50 1389.50 9960.80
1975 1738.67 b 1445.63 a 1466.50 950.17 a 315.00 192.41 a 14.00 i 114.91 b 393.50 557.50 1046.00 1667.50 9887.80
1976 1867.50 1282.50 1320.00 624.50 414.50 68.50 56.00 111.00 322.00 877.50 1321.50 1923.00 10188.50
1977 2097.50 1391.50 1028.50 581.00 160.00 139.00 41.50 206.50 336.00 640.50 1131.00 1685.50 9438.50
1978 1932.50 1634.00 1288.50 778.50 307.50 155.00 74.00 99.50 262.50 618.50 1179.83 a 1800.58 a 10130.91
1979 2054.61 d 1703.33 a 947.00 g 709.00 f 506.33 d 173.50 g 43.92 a 152.62 e 271.00 734.81 d 448.50 r 0.00 z 5466.62
1980 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 65.00 m 376.50 839.00 1095.50 1740.50 4051.50
1981 1736.50 1391.00 1121.00 751.00 444.00 164.00 67.00 h 80.00 384.00 762.50 927.50 1621.50 9383.00
1982 2214.50 1564.00 1360.00 890.00 169.50 m 303.00 50.00 183.00 331.00 622.50 1240.00 1440.00 10198.00
1983 1670.38 a 1264.50 1169.00 854.50 258.50 n 205.50 36.00 26.50 317.00 689.00 1085.00 2058.50 9375.88
1984 1801.10 a 1239.50 745.50 m 693.50 470.50 99.50 82.00 48.64 b 433.00 584.00 1111.03 a 1637.00 8199.77
1985 1844.50 1555.50 1091.00 685.50 166.00 p 296.00 88.00 190.50 382.00 707.50 1392.50 1981.00 10214.00
1986 1681.50 1523.00 1133.50 644.00 358.00 163.97 a 51.50 196.50 382.50 684.50 1280.50 1507.50 9606.96
1987 1644.50 1154.50 1051.00 584.50 180.50 m 110.50 40.50 138.50 262.00 825.00 1021.50 1393.00 8225.50
1988 1921.50 1773.50 1306.00 779.50 148.00 k 101.50 35.00 97.50 319.00 851.00 1104.50 1674.00 9963.00
1989 1646.00 1773.00 1445.00 844.50 409.00 190.50 30.50 36.00 p 297.00 636.00 1284.50 1945.00 10501.00
1990 1501.00 1446.50 1155.50 751.00 203.00 r 121.00 88.50 82.00 289.00 745.00 1032.50 1692.00 8904.00
1991 1862.50 1317.50 1193.00 642.50 156.50 p 102.00 87.00 71.00 366.00 814.50 1324.50 1590.50 9371.00
1992 1582.50 1294.50 1197.00 844.00 336.00 243.00 192.00 200.00 333.50 753.00 1165.50 1595.50 9736.50
1993 1757.00 1476.00 1212.00 827.50 181.50 t 224.00 72.50 89.50 483.50 792.50 1263.00 1564.50 9762.00
1994 2154.00 1647.00 1119.00 762.00 143.00 k 107.00 79.50 134.50 93.00 i 569.00 1019.00 1422.00 9013.00
1995 1645.00 1543.50 1152.00 925.50 150.50 t 87.50 75.00 19.00 370.00 700.00 1418.50 1759.00 9695.00
1996 2155.50 1689.50 1534.00 948.00 539.00 151.00 99.00 62.50 287.50 707.50 1349.50 1709.50 11232.50
1997 1874.50 1486.00 1311.00 834.50 589.00 97.00 98.50 165.00 272.50 681.50 1249.50 1315.00 9974.00
1998 1553.10 a 1022.00 1205.50 669.31 a 267.00 209.00 77.00 44.95 a 242.50 600.00 0.00 z 1509.00 7399.36
1999 1862.50 1266.00 1179.50 675.52 a 332.50 180.00 a 76.50 133.00 360.00 d 348.50 r 723.00 g 1465.00 7530.52
2000 1823.83 a 1365.59 a 1030.23 a 824.50 385.95 a 274.14 a 80.00 95.50 414.50 626.41 b 1097.07 a 1993.82 a 10011.54
2001 1619.75 a 1756.74 a 1426.00 b 759.64 b 391.50 153.21 b 93.00 38.00 r 285.50 f 568.00 g 817.50 d 1124.00 f 7017.35
2002 1567.00 1326.00 1550.00 821.00 603.00 126.50 38.00 81.00 273.00 973.50 1238.50 0.00 z 8597.50
Period of Record Statistics
MEAN 1837.06 1495.44 1264.71 781.60 432.62 176.42 74.20 124.25 352.33 694.98 1157.45 1652.48 10097.74
S.D. 193.79 191.51 170.00 102.13 120.35 73.14 34.74 57.02 64.13 105.99 130.94 185.88 617.99
SKEW 0.21 -0.36 0.28 -0.23 -0.02 1.04 1.29 0.00 0.46 0.54 -0.16 0.31 0.44
MAX 2214.50 1773.50 1624.50 950.17 693.50 405.58 192.00 226.50 530.50 973.50 1418.50 2058.50 11232.50
MIN 1501.00 1022.00 937.50 581.00 160.00 68.50 30.50 19.00 242.50 507.00 817.50 1315.00 9162.96
NO YRS 36 36 34 35 26 35 34 35 39 36 35 36 12