Heating Degree Days 1999
Month Allentown Normal Allentown 1999 Erie Normal Erie 1999 Harrisburg Normal Harrisburg 1999 Philadelphia Normal Philadelphia 1999 Pittsburgh Normal Pittsburgh 1999 Scranton Normal Scranton 1999 State College Normal State College 1999 Williamsport Normal Williamsport 1999
January 1153 1067 1228 1186 1128 1059 1128 920 1206 1076 1249 1143 1212 1136 1234 1186
February 997 879 1098 860 944 792 944 751 1016 861 1070 919 1053 920 1063 907
March 834 829 902 980 738 733 738 691 794 917 871 910 890 926 834 875
April 453 467 567 516 402 330 402 336 462 327 510 500 495 435 477 462
May 183 180 269 187 147 61 123 77 214 140 217 159 216 124 200 122
June 21 15 52 49 9 6 9 3 36 40 38 32 34 46 30 25
July 0 1 0 0 0 0 0 0 6 1 0 4 7 1 0 1
August 6 8 12 5 0 0 0 0 14 6 11 18 10 8 9 8
September 85 74 86 89 59 36 59 22 100 101 109 104 113 100 106 87
October 344 434 370 380 329 334 329 275 400 386 423 491 412 464 408 467
November 681 553 654 549 618 464 618 415 681 541 708 586 723 582 696 587
December 1063 941 1039 925 973 850 973 785 1039 935 1085 982 1082 985 1057 970
Cooling Degree Days 1999
Month Allentown Normal Allentown 1999 Erie Normal Erie 1999 Harrisburg Normal Harrisburg 1999 Philadelphia Normal Philadelphia 1999 Pittsburgh Normal Pittsburgh 1999 Scranton Normal Scranton 1999 State College Normal State College 1999 Williamsport Normal Williamsport 1999
January 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
February 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
March 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
April 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
May 38 16 17 42 48 72 48 51 44 24 25 19 30 27 29 21
June 156 165 97 195 186 260 186 246 123 178 104 144 109 164 114 165
July 282 414 199 341 332 493 332 508 227 350 210 312 208 329 229 360
August 214 236 171 132 285 323 285 394 184 136 163 146 165 150 189 169
September 76 92 59 87 101 142 101 177 67 83 37 95 47 64 61 79
October 6 0 7 2 10 1 10 4 9 0 0 0 0 0 0 0
November 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
December 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0