National Weather Service United States Department of Commerce
Seasonal Heating Degree Days
1970-1990
Normals 1991-2020
Season July Aug Sept Oct Nov Dec Jan Feb Mar Apr May June Total
1970-71 0 0 41 150 348 441 540 493 297 119 15 0 2444
1971-72 0 0 51 71 350 528 639 446 176 37 12 0 2310
1972-73 0 0 19 158 551 660 804 587 320 249 55 0 3403
1973-74 0 0 15 81 252 561 607 429 121 68 1 0 2135
1974-75 0 0 44 65 344 594 582 468 314 135 2 3 2551
1975-76 0 0 40 82 340 560 652 258 261 73 38 0 2304
1976-77 0 0 10 220 545 635 755 409 320 117 0 0 3011
1977-78 0 0 0 47 295 478 823 586 245 49 30 0 2553
1978-79 0 0 36 138 374 689 893 546 297 106 34 3 3116
1979-80 0 0 3 63 459 566 619 535 384 184 34 0 2847
1980-81 0 0 20 173 531 575 669 452 383 99 20 0 2922
1981-82 0 0 0 109 234 527 655 535 245 112 21 0 2438
1982-83 0 0 0 128 378 661 711 469 281 224 19 3 2874
1983-84 0 0 9 56 304 844 768 481 313 100 7 0 2882
1984-85 0 0 66 135 426 521 843 573 277 53 2 1 2897
1985-86 0 0 30 87 308 734 575 390 192 39 11 0 2366
1986-87 0 0 2 137 423 653 689 484 473 205 14 0 3080
1987-88 0 0 2 38 427 636 788 540 338 100 11 0 2880
1988-89 0 0 10 54 321 654 586 601 279 102 2 0 2609
1989-90 0 0 36 98 341 806 569 401 324 105 58 0 2738
Average
1991-2020
0 0 7 83 334 577 600 420 249 85 14 0 2369