Table 1.7 Heating Degree-Days by Month, 1949-2004
Year January February March April May June July August September October November December Total
1949 858 701 611 330 128 21 7 9 94 209 503 763 4,234
1950 761 721 693 412 162 40 11 18 85 196 565 872 4,536
1951 863 724 632 359 135 45 8 17 74 231 645 814 4,547
1952 807 677 670 315 154 32 5 11 54 324 540 785 4,374
1953 754 667 557 378 142 33 5 11 51 208 492 765 4,063
1954 886 577 646 261 192 32 8 18 56 224 523 809 4,232
1955 927 759 600 272 121 48 9 6 56 237 600 886 4,521
1956 900 723 648 387 157 27 10 14 82 215 541 683 4,387
1957 977 628 610 308 148 23 6 16 61 315 536 711 4,339
1958 909 866 690 324 143 54 7 8 60 250 484 917 4,712
1959 944 762 619 305 112 26 4 6 48 249 594 734 4,403
1960 884 780 831 278 160 33 7 11 48 254 502 936 4,724
1961 982 670 565 413 199 29 5 7 48 238 532 852 4,540
1962 976 747 689 337 118 35 14 13 91 234 554 886 4,694
1963 1,061 841 562 325 163 35 8 18 76 162 471 1,012 4,734
1964 871 803 636 339 124 39 5 22 72 301 489 814 4,515
1965 907 780 738 355 114 48 11 14 78 271 494 739 4,549
1966 1,010 790 580 377 188 30 6 14 81 298 496 830 4,700
1967 816 820 600 352 229 34 8 17 82 270 588 793 4,609
1968 979 832 567 309 192 35 6 14 59 240 548 894 4,675
1969 939 778 735 307 134 47 7 9 60 296 564 860 4,736
1970 1,063 758 685 344 120 31 4 9 55 253 541 801 4,664
1971 976 760 681 375 194 29 10 12 47 187 553 723 4,547
1972 890 785 608 377 137 49 7 12 65 330 613 832 4,705
1973 893 772 504 356 182 22 6 9 61 212 497 799 4,313
1974 838 754 556 310 171 42 6 13 94 303 524 795 4,406
1975 821 742 686 449 117 37 5 13 100 235 462 805 4,472
1976 974 609 544 309 178 28 8 19 81 367 668 941 4,726
1977 1,188 751 529 270 119 38 6 13 59 295 493 844 4,605
1978 1,061 958 677 350 157 31 7 11 59 283 517 847 4,958
1979 1,079 950 575 364 148 37 6 15 58 271 528 750 4,781
1980 887 831 680 338 142 49 5 10 54 316 564 831 4,707
1981 984 689 620 260 165 25 6 11 76 327 504 845 4,512
1982 1,067 776 620 408 114 62 7 19 75 264 515 692 4,619
1983 874 706 588 421 189 35 6 5 53 251 509 990 4,627
1984 1,000 645 704 371 172 28 7 7 88 223 565 704 4,514
1985 1,057 807 557 260 123 47 5 17 69 243 506 951 4,642
1986 859 734 542 295 123 30 9 18 76 258 558 793 4,295
1987 920 714 573 309 107 20 8 13 61 345 491 773 4,334
1988 1,004 778 594 344 134 30 3 5 72 352 506 831 4,653
1989 789 832 603 344 163 32 5 14 73 259 542 1,070 4,726
1990 728 655 535 321 184 29 6 10 56 246 457 789 4,016
1991 921 639 564 287 98 30 6 7 69 242 586 751 4,200
1992 852 644 603 345 152 46 14 24 74 301 564 822 4,441
1993 860 827 664 368 128 38 11 9 89 302 580 824 4,700
1994 1,031 813 594 293 174 21 6 16 65 268 479 723 4,483
1995 847 750 556 375 174 31 4 7 77 233 605 872 4,531
1996 945 748 713 360 165 27 8 9 72 276 630 760 4,713
1997 932 672 552 406 198 31 7 16 63 273 592 800 4,542
1998 765 623 596 331 109 41 4 5 33 245 482 717 3,951
1999 861 647 645 319 139 31 5 12 62 275 413 760 4,169
2000 886 643 494 341 115 29 12 12 69 244 610 1,005 4,460
2001 935 725 669 302 115 29 8 6 71 267 400 696 4,223
2002 R 778 R 670 R 624 R 282 R 185 23 R 3 R 8 R 38 R 299 R 561 R 813 R 4,284
2003P R 940 R 819 R 564 R 351 162 39 2 2 59 252 477 773 4,440
2004P 957 769 487 302 NA NA NA NA NA NA NA NA NA

Normals1		 917 732 593 345 159 39 9 15 77 282 539 817 4,524
1Based on calculations of data from 1971 through 2000. Web Page: For current data, see http://www.eia.doe.gov/emeu/mer/overview.html.
R=Revised. P=Preliminary. NA=Not available. Sources: · 1949-2002 and Normals—U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA), National Climatic Data Center, Asheville, North Carolina. Historical Climatology Series 5-1. · 2003 and 2004—Energy Information Administration, Monthly Energy Review, June 2003-May 2004 issues, Table 1.10, which reports data from NOAA, National Weather Service Climate Analysis Center, Camp Springs, Maryland.
Notes: · This table excludes Alaska and Hawaii. · Degree-days are relative measurements of outdoor air temperature. Heating degree-days are deviations below the mean daily temperature of 65° F. For example, a weather station recording a mean daily temperature of 40° F would report 25 heating degree-days. · Temperature information recorded by weather stations is used to calculate State-wide degree-day averages based on resident State population. Beginning in 2002, data are weighted by the estimated 2000 population. The population-weighted State figures are aggregated into Census divisions and the national average.