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
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 421.00 k 0.00
1954 676.50 503.50 472.50 172.00 104.50 0.00 0.00 a 0.00 4.00 131.50 437.00 752.00 3253.50
1955 836.00 682.50 382.50 199.66 a 70.00 4.00 0.00 0.00 d 0.00 96.50 387.50 796.50 3455.16
1956 837.50 523.00 517.70 a 299.50 96.50 1.50 0.00 0.00 11.00 54.52 b 331.07 b 346.00 3018.29
1957 698.50 537.00 472.50 151.50 53.50 0.00 0.00 0.00 a 3.50 162.48 b 302.50 539.40 a 2920.88
1958 830.28 a 775.50 685.00 275.50 48.00 11.50 0.00 0.00 7.00 121.50 278.50 830.50 3863.28
1959 804.00 577.50 509.50 212.00 48.00 4.00 0.00 a 0.00 a 4.50 103.00 344.00 594.00 3200.50
1960 689.75 a 653.00 809.00 178.50 62.50 0.50 0.00 0.00 0.00 112.00 320.89 b 819.50 3645.64
1961 857.31 b 577.50 411.78 a 0.00 z 0.00 z 9.00 h 0.00 i 0.00 6.00 n 0.00 z 340.80 e 551.00 f 2187.39
1962 726.20 d 643.00 424.50 g 278.79 a 28.00 h 0.00 g 0.00 b 0.00 c 13.50 97.00 414.50 775.00 2948.00
1963 832.50 789.00 368.00 236.38 a 115.00 1.50 0.00 a 0.00 15.50 94.00 294.00 835.45 a 3581.33
1964 656.00 658.50 423.50 277.50 119.50 6.00 0.00 0.00 4.50 166.50 246.00 517.00 3075.00
1965 690.50 663.00 626.50 342.50 57.00 0.00 z 0.00 c 2.00 0.00 a 117.50 316.00 597.50 3412.50
1966 803.50 704.00 453.00 303.00 115.00 17.50 0.00 0.00 3.50 99.00 346.00 672.00 3516.50
1967 610.00 647.50 510.50 212.00 170.50 24.50 0.00 0.00 10.00 80.00 461.00 558.50 3284.50
1968 816.00 814.00 439.50 269.50 77.00 0.00 0.00 0.00 0.00 95.00 328.50 707.00 3546.50
1969 832.00 709.50 653.50 227.50 75.00 0.00 0.00 0.00 0.50 88.50 437.00 739.00 3762.50
1970 928.97 a 633.11 a 597.27 a 255.50 42.92 e 0.00 0.00 h 0.00 e 9.50 f 77.50 c 346.55 a 625.88 b 3507.70
1971 864.42 e 605.63 a 411.50 g 281.40 e 74.06 d 0.00 c 0.00 l 0.00 f 0.00 c 20.67 a 393.75 b 321.50 f 2239.92
1972 554.56 d 649.00 486.50 252.50 87.50 11.00 0.00 0.00 1.07 b 106.50 378.21 b 468.21 b 2995.05
1973 706.80 a 700.52 a 452.17 b 200.00 58.38 a 0.00 0.00 a 0.00 0.00 b 74.29 b 332.31 d 520.00 3044.47
1974 438.81 b 544.17 e 375.62 a 177.50 53.96 d 0.00 b 0.00 0.00 6.50 223.72 a 232.00 i 566.55 b 2386.83
1975 580.22 a 303.50 l 471.64 c 388.33 c 74.83 b 0.00 p 0.00 i 0.00 c 0.00 c 41.85 a 179.00 f 371.50 m 1556.87
1976 770.00 435.00 326.61 c 206.79 b 82.48 c 0.00 j 0.00 e 4.98 c 1.00 h 129.00 k 415.00 i 367.00 p 1825.86
1977 825.50 f 610.81 a 322.50 h 56.00 k 38.20 c 5.56 c 0.00 0.00 d 1.20 e 156.03 a 182.00 f 621.50 1433.30
1978 839.00 885.50 512.50 f 236.00 136.50 4.80 e 1.79 e 0.00 0.00 c 103.00 f 255.52 a 435.50 f 2359.11
1979 703.24 d 875.00 507.76 b 255.00 d 58.38 a 0.00 b 0.00 0.00 a 1.50 127.88 c 227.50 560.38 e 3316.64
1980 708.35 a 792.13 b 497.72 d 195.00 59.00 1.07 b 0.00 e 0.00 f 0.00 a 132.00 282.50 h 463.00 g 2385.27
1981 979.60 a 156.00 w 324.50 k 146.38 a 104.50 0.00 0.00 0.00 6.00 88.00 253.50 g 737.36 c 2061.84
1982 864.38 a 615.00 497.00 347.68 b 52.04 c 1.07 b 0.00 a 0.00 b 17.50 144.50 295.38 d 409.50 h 2834.55
1983 759.50 a 673.62 b 474.82 a 340.50 91.50 2.50 0.00 b 0.00 17.50 96.62 a 402.69 d 573.50 e 3432.74
1984 928.40 b 570.72 d 641.00 343.39 b 73.50 9.31 a 0.00 0.00 20.50 37.20 a 440.17 a 460.87 a 3525.06
1985 953.50 708.50 512.03 b 226.00 27.68 c 4.62 d 0.00 d 0.00 2.07 a 33.58 a 124.00 699.64 b 3291.62
1986 782.50 648.00 530.00 264.00 92.00 0.00 0.00 0.00 6.50 72.00 279.00 581.00 3255.00
1987 726.00 754.96 a 551.00 319.00 47.00 0.00 0.00 0.00 0.00 224.00 296.50 580.50 3498.96
1988 862.83 a 602.00 455.00 239.50 56.00 i 15.00 0.00 0.00 0.00 112.00 k 223.50 i 421.00 j 2174.33
1989 344.50 l 417.00 f 496.00 c 142.50 l 54.00 k 0.00 0.00 k 0.00 3.00 j 50.00 m 163.50 j 460.00 n 496.00
1990 340.50 j 259.50 i 224.00 q 219.00 45.00 1.00 i 0.00 j 0.00 11.50 l 56.50 o 190.50 l 194.00 p 264.00
1991 402.00 k 286.00 i 235.00 k 204.11 b 24.50 0.00 j 0.00 0.00 i 3.50 j 125.50 i 207.00 l 376.00 j 228.61
1992 395.00 l 329.50 k 484.00 250.86 a 0.00 z 5.69 a 0.00 0.00 4.00 i 110.00 j 147.50 l 384.50 i 740.55
1993 341.50 l 682.50 589.53 b 265.34 a 10.00 m 5.50 0.00 m 0.00 m 1.50 i 48.00 r 197.50 j 332.00 n 1542.88
1994 502.00 l 564.67 a 417.00 97.50 j 56.00 k 0.00 0.00 k 0.00 0.00 i 118.00 k 105.00 j 271.00 m 981.67
1995 442.50 l 474.50 i 260.00 k 139.50 k 44.50 i 0.00 0.00 k 0.00 2.00 j 46.00 j 129.00 r 202.50 u 0.00
1996 419.00 n 378.50 l 311.50 l 214.14 a 71.00 j 5.50 j 0.00 k 0.00 i 0.00 j 29.50 j 251.00 m 256.50 o 214.14
1997 410.00 j 267.50 k 269.00 j 283.45 a 44.50 l 22.50 l 0.00 j 0.00 j 0.50 k 84.00 l 245.50 m 171.00 v 283.45
1998 253.00 n 214.00 m 274.50 l 151.07 b 38.50 m 2.00 j 0.00 i 0.00 o 0.00 i 48.00 n 149.00 n 216.00 o 151.07
1999 240.50 n 297.50 m 340.00 j 100.00 n 57.00 l 0.00 h 0.00 l 0.00 k 2.50 j 41.00 s 195.50 l 381.00 k 0.00
2000 476.50 l 353.50 j 283.00 h 164.50 k 39.00 j 1.50 i 0.00 j 0.00 h 4.50 k 47.50 l 247.00 m 226.50 t 0.00
2001 503.00 j 311.50 j 360.00 k 182.00 i 55.50 j 0.00 i 0.00 k 0.00 g 0.00 k 54.50 j 172.00 j 133.00 p 0.00
2002 223.00 n 291.50 k 212.00 q 95.00 j 32.50 l 0.00 k 0.00 i 0.00 l 0.00 n 55.50 k 140.50 r 355.00 p 0.00
2003 497.00 m 397.50 k 278.50 j 189.50 i 29.00 j 3.00 j 0.00 k 0.00 k 0.00 l 0.00 z 65.50 o 322.50 o 0.00
2004 462.00 m 422.00 k 311.00 j 148.00 n 14.00 k 0.00 n 0.00 l 0.00 i 0.00 i 55.50 m 171.50 l 274.00 n 0.00
2005 389.00 k 362.00 k 449.50 h 109.00 n 79.50 j 4.00 h 0.00 l 0.00 j 0.00 i 55.00 l 92.00 n 459.50 k 0.00
2006 259.50 n 182.00 s 216.50 s 82.00 s 22.00 z 0.00 q 0.00 s 0.00 l 0.00 l 61.50 n 143.50 l 277.00 l 0.00
2007 393.00 m 425.00 k 216.50 j 133.00 k 17.00 o 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 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
2009 0.00 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
2010 0.00 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
2011 871.00 577.50 505.50 164.00 46.50 0.00 0.00 0.00 a 1.50 86.05 b 253.50 454.00 2959.55
2012 597.27 a 550.50 285.31 d 216.50 16.50 1.50 0.00 0.00 4.66 a 48.50 h 0.00 z 0.00 z 1672.24
Period of Record Statistics
MEAN 767.11 652.35 496.90 244.73 72.19 3.75 0.05 0.17 4.82 105.04 331.39 626.03 3338.30
S.D. 120.11 101.22 102.47 58.88 32.98 5.71 0.30 0.84 5.95 47.55 74.74 127.86 267.23
SKEW -0.56 0.39 0.71 0.38 0.83 1.98 5.66 5.10 1.27 0.68 -0.41 -0.01 0.11
MAX 979.60 885.50 809.00 388.33 170.50 24.50 1.79 4.98 20.50 224.00 461.00 835.45 3863.28
MIN 438.81 435.00 285.31 146.38 16.50 0.00 0.00 0.00 0.00 20.67 124.00 346.00 2920.88
NO YRS 36 37 36 42 36 37 35 40 34 32 29 28 22