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 201304
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
1938 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
1939 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
1940 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
1941 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
1942 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
1943 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
1944 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
1945 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
1946 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
1947 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
1948 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
1949 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
1950 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
1951 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
1952 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
1953 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
1954 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
1955 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
1956 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
1957 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
1958 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
1959 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
1960 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
1961 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
1962 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 61.00 f 20.00 17.00 268.00 438.50 875.00 1381.00 2999.50
1963 1910.50 1441.00 966.50 509.40 e 309.00 54.64 b 3.00 49.50 130.50 236.00 781.00 1671.50 8062.54
1964 1321.50 1174.50 1140.50 535.00 165.00 75.00 1.00 z 72.50 f 219.00 538.50 853.00 702.50 q 6022.00
1965 1732.50 1152.00 g 1415.50 703.50 184.50 56.79 b 22.00 0.00 z 323.50 481.00 928.50 1121.50 6969.29
1966 1901.00 1368.00 912.50 680.00 396.50 63.50 5.50 42.50 206.50 502.50 967.50 b 1383.50 8429.50
1967 1487.00 1516.50 1043.00 542.50 413.00 20.69 a 39.50 62.52 a 192.00 529.58 a 1042.00 1204.02 c 8092.31
1968 1521.50 1418.00 830.80 a 511.11 c 336.00 73.50 18.00 41.00 147.50 439.50 931.50 1413.50 7681.91
1969 1672.50 1247.50 1233.00 478.50 221.00 144.00 8.50 0.00 148.50 588.50 944.00 1395.00 8081.00
1970 1819.70 a 1352.00 1171.50 584.50 205.50 30.50 9.50 21.50 199.00 473.50 952.00 1433.00 8252.20
1971 1818.00 1359.00 1186.50 549.50 357.50 12.50 38.50 43.50 175.50 329.00 932.50 1383.00 8185.00
1972 1788.50 1526.00 1163.50 698.00 214.00 105.50 61.00 76.50 236.50 643.50 1003.50 1631.50 9148.00
1973 1532.00 1269.50 830.50 659.50 383.00 61.50 8.00 32.00 235.00 319.50 0.00 z 1463.50 6794.00
1974 1559.00 1362.00 1045.50 543.00 361.00 86.50 0.00 30.00 271.03 a 477.00 909.50 1241.50 7886.03
1975 1528.00 1365.00 1311.00 795.50 201.50 65.50 23.50 1.00 266.00 331.81 d 803.40 e 1294.00 7986.21
1976 1536.00 1048.00 953.00 431.11 c 285.50 7.00 0.00 20.50 191.50 628.50 1119.50 1622.85 a 7843.46
1977 584.00 t 742.50 i 793.50 353.50 86.00 30.00 a 0.00 14.39 c 79.50 492.00 811.61 b 1414.78 b 4075.28
1978 0.00 z 1483.44 c 1100.00 543.50 171.50 27.50 2.00 9.50 78.50 477.50 934.00 1520.66 c 6348.10
1979 1971.50 1506.00 1077.50 623.50 285.00 19.00 0.00 34.00 0.00 z 464.50 897.50 1130.00 8008.50
1980 1441.50 c 1356.00 1095.00 473.00 135.88 a 20.50 0.00 7.50 119.00 538.50 773.50 1299.00 7259.38
1981 1349.50 1068.50 786.00 352.50 216.00 7.22 c 0.00 f 1.50 139.66 a 538.50 817.00 1411.00 6687.38
1982 1807.00 1316.50 1079.50 673.50 119.50 104.50 2.00 37.00 186.50 0.00 z 0.00 z 1231.00 6557.00
1983 1390.00 1061.93 a 975.50 737.50 369.50 78.50 3.00 0.00 213.10 a 525.00 913.50 1862.50 8130.03
1984 1634.50 1086.00 1249.00 591.00 350.50 18.50 17.00 15.00 210.00 381.09 b 884.50 1361.50 7798.59
1985 1601.50 1364.50 849.00 375.50 115.00 102.50 4.50 37.50 231.00 494.50 1084.00 1707.30 d 7966.80
1986 1122.50 f 1341.41 a 989.00 352.00 180.66 b 22.00 7.00 59.00 171.00 501.00 1077.00 1279.50 5979.56
1987 1370.00 984.00 828.00 398.50 154.00 36.50 2.50 47.00 133.00 661.50 811.50 1228.50 6655.00
1988 1685.00 1493.50 990.00 600.00 125.50 24.50 4.00 28.50 165.50 715.00 932.50 1415.00 8179.00
1989 1326.50 1552.00 1192.50 616.00 302.00 75.50 0.50 23.00 211.50 510.00 1093.50 1707.00 8610.00
1990 1252.00 1203.00 915.50 589.50 328.00 59.50 18.50 17.50 148.50 552.50 764.00 1432.00 7280.50
1991 1535.50 1090.00 950.50 446.00 184.50 3.00 9.00 7.50 233.50 515.00 1141.50 1259.50 7375.50
1992 1246.50 991.50 945.00 626.00 201.50 66.50 43.00 58.00 166.00 527.00 953.50 1271.50 7096.00
1993 1478.00 1266.00 1052.00 627.50 229.50 59.00 0.00 15.00 296.00 527.00 951.50 1268.50 7770.00
1994 1805.50 1367.50 893.50 521.00 190.50 44.50 13.50 54.00 107.00 405.00 829.00 1172.50 7403.50
1995 1427.00 1208.50 882.50 679.50 317.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4515.00
1996 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 76.00 19.50 17.50 212.00 516.00 1172.59 a 1536.00 3549.59
1997 1717.00 1272.50 1120.00 667.00 480.50 34.00 34.50 40.00 144.00 503.00 1088.00 1167.50 8268.00
1998 1362.50 922.00 1036.00 473.50 126.50 116.50 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4037.00
1999 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 46.50 z 760.00 1305.00 2065.00
2000 1625.00 1165.50 822.50 620.50 259.50 94.50 24.50 10.50 230.00 452.50 1013.50 1833.50 8152.00
2001 1504.00 1521.33 a 1215.00 442.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4240.33
2002 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 155.50 672.50 1005.50 1256.00 3089.50
2003 1591.50 1398.50 1067.00 588.00 290.00 70.00 12.00 10.50 219.50 549.50 971.50 1290.00 8058.00
2004 1648.00 1332.50 930.00 561.50 319.00 93.00 19.00 108.00 94.00 507.50 854.50 1335.50 7802.50
2005 1564.98 a 1136.50 1120.50 487.00 347.00 6.00 11.50 23.50 117.50 483.00 894.50 1502.50 7694.48
2006 1148.00 1302.00 a 1029.00 425.00 284.50 38.50 2.50 1.00 246.50 662.50 890.00 1143.00 7172.50
2007 1442.00 1536.00 943.00 610.00 144.50 22.00 5.00 14.50 148.50 398.50 967.00 1541.73 a 7772.73
2008 1680.00 1569.50 1279.50 724.50 503.00 100.50 13.00 26.50 138.50 565.50 959.00 1666.50 9226.00
2009 1947.50 1292.50 1071.57 a 641.00 285.72 a 113.00 51.50 61.00 108.00 711.00 767.50 1520.00 8570.28
2010 1723.50 1436.00 918.50 413.50 266.50 39.50 0.00 5.50 205.00 450.50 912.00 1601.00 7971.50
2011 1739.00 1356.50 1153.50 632.00 304.50 64.29 b 1.55 a 4.28 b 216.50 453.50 829.29 b 1267.00 8021.90
2012 1435.96 c 1120.00 544.57 a 549.83 a 154.48 a 39.83 a 0.00 39.50 265.00 c 627.50 873.89 c 1304.07 a 6954.62
2013 1541.00 1345.08 b 1293.50 35.50 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 4179.58
Period of Record Statistics
MEAN 1580.43 1302.04 1028.98 560.74 257.85 55.74 12.85 28.77 186.95 507.29 927.64 1401.71 7909.63
S.D. 198.12 168.07 166.77 110.45 100.30 34.78 14.98 23.27 58.10 101.17 105.99 184.88 550.81
SKEW 0.04 -0.41 -0.16 -0.20 0.36 0.40 1.48 1.08 0.11 -0.15 0.40 0.65 0.09
MAX 1971.50 1569.50 1415.50 795.50 503.00 144.00 61.00 108.00 323.50 715.00 1172.59 1862.50 9226.00
MIN 1148.00 922.00 544.57 352.00 86.00 3.00 0.00 0.00 78.50 236.00 760.00 1121.50 6655.00
NO YRS 45 46 48 46 46 46 45 44 46 46 46 47 35