date! ,

Monthly Total Heating Degree Days

(a vali)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1914 418.50 310.00 235.00 205.50 273.00 260.50 247.00 214.00 148.00 110.00 181.00 505.50 3108.00
1915 443.50 341.00 229.50 238.00 232.00 194.50 151.50 135.50 84.50 136.00 266.00 399.50 2851.50
1916 558.50 265.00 263.00 229.50 285.50 227.50 166.00 204.50 107.00 250.00 317.00 500.00 3373.50
1917 540.00 358.50 413.00 297.00 341.50 204.50 176.50 233.00 100.50 137.00 190.00 323.00 3314.50
1918 383.00 367.50 314.00 246.00 320.00 176.50 191.50 131.00 89.50 75.50 282.00 460.50 3037.00
1919 427.50 375.50 384.00 270.50 247.00 224.00 247.00 208.50 114.00 156.50 269.50 501.50 3425.50
1920 396.50 353.00 388.00 301.00 287.00 158.50 221.50 154.50 150.50 156.00 289.50 434.50 3290.50
1921 477.00 338.50 324.00 316.00 331.50 139.00 205.00 171.00 94.00 125.00 225.50 374.50 3121.00
1922 566.00 414.00 392.50 343.50 230.50 157.00 150.00 149.00 81.50 127.50 321.00 446.50 3379.00
1923 524.00 359.00 269.00 268.00 245.50 234.50 133.50 114.00 79.00 105.50 127.50 432.00 2891.50
1924 458.50 230.50 325.50 236.50 202.00 164.00 184.50 182.00 105.00 180.00 249.00 531.50 3049.00
1925 421.00 275.00 298.00 245.50 190.00 156.50 124.00 130.00 74.00 112.50 251.50 381.00 2659.00
1926 530.00 251.50 153.50 124.00 132.50 180.50 130.00 141.50 128.00 75.00 127.50 418.50 2392.50
1927 424.50 307.50 334.00 289.00 225.50 181.00 196.50 164.50 84.50 102.50 212.00 408.50 2930.00
1928 451.50 287.00 209.50 224.00 188.50 142.50 196.00 203.00 162.50 180.50 259.50 476.50 2981.00
1929 540.50 370.50 337.00 349.50 264.00 122.00 117.00 122.00 111.00 95.00 168.00 333.50 2930.00
1930 475.00 239.50 249.00 173.50 277.00 152.50 204.00 111.00 81.00 93.50 216.00 400.00 2672.00
1931 394.50 232.50 185.50 183.50 140.00 100.50 124.50 157.50 98.50 176.00 321.00 488.50 2602.50
1932 486.00 395.50 245.00 271.50 214.00 180.50 163.50 135.00 98.50 101.00 145.50 544.00 2980.00
1933 557.50 386.00 297.00 294.50 310.50 221.50 174.50 170.00 122.50 137.50 154.50 450.50 3276.50
1934 408.00 262.50 143.00 181.00 147.50 140.00 158.50 137.00 91.50 112.00 196.50 374.50 2352.00
1935 441.00 304.50 383.50 204.00 221.50 137.50 158.50 165.50 160.50 131.50 304.00 376.50 2988.50
1936 345.50 336.00 236.50 191.00 132.00 104.00 171.00 178.00 105.50 108.50 210.50 417.50 2536.00
1937 664.00 423.00 316.00 314.50 243.50 122.50 178.00 195.50 133.00 89.50 201.50 320.00 3201.00
1938 420.00 334.00 377.50 304.00 261.50 226.50 190.50 154.50 124.00 116.00 246.50 353.00 3108.00
1939 404.00 385.50 382.00 284.50 249.00 213.50 189.50 140.00 77.00 119.00 175.50 300.00 2919.50
1940 384.00 278.00 235.50 224.00 216.50 180.00 152.50 158.00 32.00 113.00 239.00 296.00 2508.50
1941 342.00 270.00 206.00 275.50 151.00 149.50 150.00 122.50 79.00 151.00 203.50 358.00 2458.00
1942 430.50 326.00 302.00 282.50 266.00 201.50 163.50 202.50 154.50 135.00 269.50 400.50 3134.00
1943 406.50 287.00 291.00 282.50 225.50 239.50 184.50 170.50 99.50 129.00 173.50 354.00 2843.00
1944 409.50 388.00 286.00 354.00 254.50 217.00 238.00 193.00 147.50 125.50 277.50 335.00 3225.50
1945 459.00 298.50 408.50 274.00 298.00 148.00 169.50 198.00 112.00 119.00 267.50 380.00 3132.00
1946 422.50 401.00 366.00 296.50 292.00 190.50 144.00 220.00 117.50 170.00 310.00 424.00 3354.00
1947 552.50 319.00 279.50 224.50 232.50 116.50 153.00 113.50 137.50 108.50 290.00 435.00 2962.00
1948 319.00 412.50 411.50 342.50 293.00 172.50 181.50 166.00 154.00 156.00 252.50 533.50 3394.50
1949 630.00 467.50 365.50 283.50 268.50 211.50 231.50 174.00 106.00 217.00 159.00 446.50 3560.50
1950 563.00 369.00 368.50 273.00 324.00 246.50 225.00 176.50 128.00 113.50 138.00 352.50 3277.50
1951 457.00 359.00 340.00 380.50 248.00 264.00 272.00 239.00 180.50 128.50 264.00 466.50 3599.00
1952 526.00 373.00 427.00 290.00 247.50 253.50 200.00 221.00 133.00 206.50 276.50 415.50 3569.50
1953 330.50 308.00 367.00 370.00 274.00 221.50 241.00 171.00 93.00 129.00 250.00 310.50 3065.50
1954 418.50 310.00 401.00 240.00 275.00 204.00 193.00 227.00 126.00 121.50 251.00 467.50 3234.50
1955 523.50 358.00 316.00 382.50 265.50 247.00 252.50 267.50 188.00 180.00 278.00 370.50 3629.00
1956 413.50 395.50 352.00 319.50 244.00 196.00 245.50 189.50 96.50 175.50 175.50 381.00 3184.00
1957 501.50 309.00 337.50 228.50 221.50 132.50 170.00 171.50 60.00 87.00 246.00 420.00 2885.00
1958 379.50 247.50 369.00 241.00 178.00 79.00 188.00 127.50 42.00 116.50 211.00 231.50 2410.50
1959 341.00 324.00 216.00 221.00 255.50 172.00 172.00 124.50 78.50 76.50 153.00 315.00 2449.00
1960 433.00 312.00 289.50 272.50 251.00 184.00 214.00 226.00 173.50 146.50 285.50 423.00 3210.50
1961 494.50 268.00 333.50 249.00 288.00 172.00 170.50 132.50 97.00 160.50 256.00 464.50 3086.00
1962 407.00 369.00 383.50 248.50 304.50 239.50 280.50 162.50 203.50 136.00 190.00 376.50 3301.00
1963 453.00 185.50 338.00 319.00 242.00 208.00 173.50 166.50 44.00 73.50 251.50 520.00 2974.50
1964 436.00 290.50 369.00 343.00 361.50 223.00 193.50 160.00 144.50 105.50 292.00 351.50 3270.00
1965 422.00 308.50 329.00 286.50 315.00 265.00 235.00 129.50 128.00 76.00 207.00 517.00 3218.50
1966 400.50 370.00 347.00 223.00 307.50 187.50 213.00 192.50 84.00 106.00 247.50 424.50 3103.00
1967 384.00 331.50 381.50 428.00 234.50 238.00 194.00 181.50 74.00 51.00 164.00 407.50 3069.50
1968 473.00 242.50 260.00 266.00 289.50 182.00 221.50 106.50 94.50 153.50 264.00 471.00 3024.00
1969 510.00 419.00 338.50 325.00 249.50 191.50 229.00 176.00 138.00 114.00 173.50 286.50 3150.50
1970 341.00 214.50 228.00 351.50 244.50 249.00 239.50 249.00 99.00 209.00 215.00 448.00 3088.00
1971 439.50 366.50 363.00 357.00 324.00 237.50 234.50 127.50 90.00 235.00 282.50 496.00 3553.00
1972 511.50 320.00 287.00 285.50 294.50 231.00 150.50 149.00 118.00 120.00 303.00 552.00 3322.00
1973 460.50 284.00 386.50 235.00 275.00 171.50 207.00 245.50 144.00 140.00 290.50 403.50 3243.00
1974 431.50 361.00 362.50 290.00 318.00 208.50 172.50 160.00 159.50 124.50 251.00 431.00 3270.00
1975 433.50 327.50 369.50 393.00 265.00 243.50 194.50 179.00 181.50 170.50 283.50 360.00 3401.00
1976 361.50 353.00 386.00 327.00 270.50 185.50 180.50 91.50 121.50 109.50 154.50 324.00 2865.00
1977 469.00 249.50 366.50 268.00 300.50 239.50 203.00 124.00 98.50 145.00 193.50 312.50 2969.50
1978 311.00 275.00 195.00 262.50 161.00 184.50 204.50 143.00 48.00 140.50 275.50 478.00 2678.50
1979 436.00 339.00 289.00 257.50 191.50 205.00 158.00 133.00 28.00 71.00 220.50 299.50 2628.00
1980 373.50 227.00 281.50 247.00 298.50 223.50 172.50 221.00 139.00 136.50 205.50 359.00 2884.50
1981 391.00 251.50 312.00 290.00 256.00 127.50 229.00 182.00 141.50 181.50 202.00 342.00 2906.00
1982 513.50 280.00 379.00 288.00 287.50 261.50 219.50 159.00 87.50 94.00 318.00 397.00 3284.50
1983 484.50 290.50 301.00 246.00 180.00 116.50 88.00 16.50 33.00 58.00 266.50 377.50 2458.00
1984 416.00 360.50 258.50 328.50 176.50 165.50 75.50 89.00 21.00 122.00 272.00 439.00 2724.00
1985 466.50 259.00 367.00 179.00 217.00 61.00 76.50 53.00 40.50 104.00 308.00 426.50 2558.00
1986 261.50 176.50 151.00 201.00 160.50 73.00 85.00 97.50 70.50 88.50 155.50 388.50 1909.00
1987 409.50 240.50 248.50 147.50 159.50 153.50 113.50 59.00 56.00 64.00 188.00 395.50 2235.00
1988 377.50 215.50 188.50 204.50 201.50 129.50 65.00 57.00 86.50 143.00 235.00 365.00 2268.50
1989 426.00 420.50 299.00 178.50 185.00 137.00 94.00 73.50 100.50 120.00 187.50 384.50 2606.00
1990 380.00 365.50 315.00 177.50 193.50 104.50 81.50 26.50 12.00 62.00 211.00 493.00 2422.00
1991 360.50 199.50 366.00 241.50 256.00 196.50 134.50 81.00 80.00 78.00 157.00 360.00 2510.50
1992 421.00 194.00 179.00 92.00 82.00 82.00 33.00 59.50 32.50 34.00 167.00 412.50 1788.50
1993 431.50 314.50 186.00 168.00 97.00 52.00 80.00 37.50 79.50 68.50 211.00 418.00 2143.50
1994 351.50 345.00 219.00 222.50 198.00 139.50 170.50 76.00 61.50 104.00 392.00 480.00 2759.50
1995 340.00 226.50 274.50 245.00 236.00 139.00 35.00 69.00 50.00 71.00 127.50 294.50 2108.00
1996 340.50 232.00 197.50 146.00 138.00 113.50 74.50 63.50 78.50 119.00 209.50 284.50 1997.00
1997 383.00 249.50 216.50 207.50 116.50 102.50 88.50 18.50 6.50 106.50 193.50 346.50 2035.50
1998 352.50 345.50 289.50 289.00 262.00 172.00 163.00 132.50 114.00 151.50 294.50 466.50 3032.50
1999 449.50 379.50 428.50 320.00 349.00 260.00 200.50 132.50 142.00 118.00 219.50 334.00 3333.00
2000 383.50 324.00 319.00 247.50 224.50 191.00 207.00 138.00 67.50 175.50 336.00 342.50 2956.00
2001 422.50 362.50 284.50 375.00 147.00 124.00 150.00 109.00 132.50 110.00 192.50 379.50 2789.00
2002 444.00 269.50 345.50 305.00 309.50 219.00 185.00 160.50 136.00 164.00 169.00 334.00 3041.00
2003 270.50 291.50 271.50 332.50 227.00 169.00 177.50 65.50 78.50 125.50 290.00 376.50 2675.50
2004 410.00 328.00 179.00 220.50 214.00 182.00 134.00 87.00 70.00 186.00 255.00 357.00 2622.50
2005 455.00 256.50 233.00 272.50 183.00 170.00 131.75 a 170.00 164.00 145.50 153.00 295.00 2629.25
2006 384.00 288.50 437.50 304.00 240.00 156.50 131.00 170.00 170.50 147.50 262.50 392.00 3084.00
2007 466.00 335.50 255.00 288.00 261.00 186.50 111.00 105.50 76.00 158.50 232.00 441.00 2916.00
2008 471.50 344.00 326.00 311.50 261.50 196.50 150.00 110.00 99.50 94.50 192.00 452.00 3009.00
2009 337.50 339.50 337.50 297.50 238.00 139.50 187.00 104.50 80.50 129.00 236.00 456.50 2883.00
2010 412.00 294.50 307.50 301.00 275.50 177.00 205.00 202.00 107.50 168.00 283.00 370.00 3103.00
2011 411.50 368.50 337.00 295.50 292.00 197.50 156.00 159.50 101.50 88.00 311.00 394.50 3112.50
2012 374.50 322.50 363.73 a 269.00 251.50 182.50 172.50 186.00 208.50 118.50 92.00 p 245.50 l 2449.23
2013 439.34 b 352.00 315.68 a 7.50 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 18.00 z 1107.03
Period of Record Statistics
MEAN 431.85 315.40 307.02 268.66 241.26 178.90 170.94 146.88 103.68 126.16 232.92 401.48 2923.01
S.D. 70.88 60.25 70.66 61.43 57.91 49.41 51.09 53.79 42.35 39.95 55.51 67.12 398.28
SKEW 0.50 -0.14 -0.39 -0.17 -0.49 -0.33 -0.49 -0.30 0.10 0.48 0.07 0.11 -0.68
MAX 664.00 467.50 437.50 428.00 361.50 265.00 280.50 267.50 208.50 250.00 392.00 552.00 3629.00
MIN 261.50 176.50 143.00 92.00 82.00 52.00 33.00 16.50 6.50 34.00 127.50 231.50 1788.50
NO YRS 100 100 100 99 99 99 99 99 99 99 98 98 98