date! ,

Monthly Total Heating Degree Days

(a vali)

Base Temperature = 65 F

File last updated on Oct 29, 2012
*** Note *** Provisional Data *** After Year/Month 201210
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
1945 0.00 z 37.50 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 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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1963 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
1964 0.00 z 0.00 z 864.50 i 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
1965 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 174.50 t 492.00 914.50 1146.50 2553.00
1966 1567.50 1253.00 1037.00 847.50 526.50 138.50 15.50 97.00 217.00 579.00 978.00 1289.00 8545.50
1967 1383.50 1449.00 1176.00 714.00 591.50 174.00 85.00 102.00 207.00 587.00 1000.50 1237.50 8707.00
1968 1495.00 1440.00 969.50 667.50 517.00 231.50 64.50 95.00 188.50 444.33 a 927.00 1295.00 8334.83
1969 1392.00 1250.50 1299.50 740.50 426.00 302.50 99.50 21.00 212.00 622.00 907.50 1242.50 8515.50
1970 1595.50 1352.00 1260.00 744.50 539.00 178.50 42.00 37.00 238.00 426.50 896.00 1282.00 8591.00
1971 1566.50 1323.50 1231.50 731.50 521.66 b 137.50 97.02 d 113.87 e 193.85 d 340.50 888.50 1235.02 c 8380.90
1972 1566.00 1484.50 1357.00 970.00 408.00 211.50 114.50 100.50 h 311.67 c 656.74 d 717.00 h 837.50 n 7079.91
1973 1335.07 a 644.50 m 941.50 749.00 573.50 c 156.92 d 24.00 n 22.00 l 129.50 k 259.00 j 519.50 l 446.00 t 3755.99
1974 602.00 s 486.00 r 1188.52 c 439.50 p 99.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 535.50 k 1101.61 c 2290.12
1975 1331.93 b 1196.50 1219.50 947.50 374.98 e 183.21 b 51.00 g 66.00 299.48 a 326.50 i 769.00 1301.50 7689.61
1976 1522.50 1130.00 1121.00 634.50 482.00 73.50 39.50 77.00 259.50 683.00 1061.50 1531.00 8615.00
1977 1750.00 1260.50 955.00 685.50 252.00 196.50 53.50 149.50 264.00 514.00 904.50 1321.00 8306.00
1978 1475.17 b 1321.50 1175.00 848.00 393.00 176.00 56.00 47.50 224.50 555.00 934.00 1454.50 8660.17
1979 1690.50 1549.00 1182.50 870.50 566.00 208.45 a 85.00 120.00 241.50 686.00 966.00 1160.50 9325.95
1980 847.00 m 1404.00 1262.50 740.00 349.27 a 245.00 41.85 a 57.00 293.57 b 722.50 934.00 1429.00 7478.69
1981 1458.00 1222.00 1143.56 d 507.50 h 503.50 139.00 80.50 66.81 b 349.14 a 686.00 804.81 d 1283.00 7736.31
1982 1724.12 a 1394.00 1188.50 864.50 327.50 287.00 52.50 152.50 299.00 558.50 369.00 t 1201.00 8049.12
1983 1349.50 1088.50 1120.00 875.00 615.50 194.00 28.50 30.50 224.50 582.00 413.50 o 1609.50 7717.50
1984 1559.50 1077.00 1340.50 277.50 p 456.00 99.00 44.50 48.00 321.00 528.50 930.00 1341.50 7745.50
1985 1556.50 1428.50 1046.00 237.00 n 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 205.50 q 994.44 c 1521.98 e 6547.42
1986 1391.50 1299.50 1065.50 595.50 280.50 152.14 b 50.50 91.50 251.90 a 589.50 1044.50 1202.50 8015.04
1987 1274.50 1047.50 984.50 610.50 343.00 92.50 38.50 65.00 192.50 666.00 657.50 f 707.00 m 5314.50
1988 1498.50 1438.00 1145.00 738.00 342.50 120.00 16.50 75.50 211.55 a 650.50 895.50 1305.62 a 8437.17
1989 1259.00 1403.00 0.00 z 829.50 409.00 226.00 51.50 68.50 204.50 491.00 1060.86 a 1588.00 7590.86
1990 1215.50 0.00 z 1054.50 660.50 581.00 163.00 70.00 78.00 263.00 624.50 861.50 1330.00 6901.50
1991 1548.50 1162.50 1136.00 659.00 395.50 148.00 73.00 63.00 311.50 627.00 1023.00 1272.50 8419.50
1992 1341.00 1185.00 1187.50 800.50 346.50 236.50 104.50 i 131.50 270.00 663.50 642.50 k 0.00 z 6162.00
1993 556.00 t 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 328.50 s 1287.00 1287.00
1994 1813.50 1561.78 a 1086.00 779.46 b 284.00 k 150.00 76.50 97.50 172.00 f 497.00 797.50 196.50 y 6859.24
1995 379.00 v 1288.50 534.00 r 293.00 s 446.50 119.00 76.00 23.00 294.50 0.00 z 1176.50 1416.50 4840.50
1996 1535.50 740.00 p 680.00 n 931.00 625.00 235.00 0.00 z 0.00 z 232.50 594.50 1066.50 1347.50 6567.50
1997 1535.50 1254.00 626.00 o 439.00 p 643.50 108.50 i 46.50 s 97.50 k 64.50 t 566.00 1012.50 1119.62 a 6131.12
1998 1354.00 984.67 a 1153.00 487.50 j 362.50 213.00 26.50 k 19.00 j 151.00 154.50 v 473.50 n 1183.68 a 5401.85
1999 1176.50 g 492.00 p 1121.54 c 463.00 l 210.00 k 49.00 s 11.00 x 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1121.54
2000 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
2001 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
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 0.00 z 0.00 z 0.00 z 0.00 z 0.00
2003 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
2004 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
2005 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
2006 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
2007 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
2008 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 185.50 61.00 79.00 206.50 548.00 902.00 1477.50 3459.50
2009 1652.50 1287.00 1185.00 839.50 493.00 265.00 162.50 128.50 132.50 738.00 727.50 1356.00 8967.00
2010 1362.50 1206.50 941.00 599.00 348.00 184.50 33.00 35.00 331.50 495.00 892.00 1298.50 7726.50
2011 1502.00 1263.50 1206.00 805.00 506.00 256.00 29.50 29.50 262.00 505.00 849.00 1209.00 8422.50
2012 1316.00 1107.50 756.00 0.00 z 301.50 116.50 15.50 50.00 295.50 136.50 x 0.00 z 0.00 z 3958.50
Period of Record Statistics
MEAN 1482.39 1284.78 1128.37 767.05 449.91 182.21 60.48 76.54 248.60 578.03 935.14 1314.47 8498.10
S.D. 148.08 145.88 127.54 106.09 108.46 56.04 32.43 36.71 52.77 91.98 98.83 129.63 357.91
SKEW 0.26 -0.03 -0.68 0.11 0.08 0.17 1.05 0.40 -0.09 -0.40 0.14 0.61 0.15
MAX 1813.50 1561.78 1357.00 970.00 643.50 302.50 162.50 152.50 349.14 738.00 1176.50 1609.50 9325.95
MIN 1215.50 984.67 756.00 595.50 252.00 73.50 15.50 21.00 132.50 340.50 727.50 1101.61 7726.50
NO YRS 33 32 33 28 33 34 29 30 32 31 29 33 16