ENGINEERING MANUAL OF AUTOMATIC CONTROL
GENERAL ENGINEERING DATA
474
COOLING DATA
Table 2. Cooling Data.
Cooling Degree Days Cooling
Design (5%) Average
City Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Dry Bulb Wet Bulb
Anchorage, AK 0 0 0 0 0 0 0 0 0 0 0 0 0 66 56
Atlanta, GA 0 0 8 33 157 330 428 406 241 54 10 0 1667 90 73
Baltimore, MD 0 0 0 0 59 227 372 329 134 16 0 0 1137 89 74
Boston, MA 0 0 0 0 10 113 264 220 66 5 0 0 678 85 70
Brownsville, TX 59 62 159 312 462 540 605 605 504 332 161 87 3888 92 77
Buffalo, NY 0 0 0 0 19 86 194 141 37 0 0 0 477 83 69
Charlotte, NC 0 0 0 15 116 321 443 412 228 47 0 0 1582 91 74
Chicago, IL 0 0 0 0 46 143 259 226 66 12 0 0 752 88 73
Dallas-Ft. Worth, TX 0 5 29 90 246 480 629 617 372 119 11 5 2603 97 75
Des Moines, IA 0 0 0 5 81 214 360 287 74 15 0 0 1036 88 73
Denver, CO 0 0 0 0 11 128 267 203 63 7 0 0 679 89 59
Detroit, MI 0 0 0 0 38 116 231 186 48 7 0 0 626 86 71
Duluth, MN 0 0 0 0 0 14 94 72 0 0 0 0 180 79 66
Fairbanks, AK 0 0 0 0 0 26 45 13 0 0 0 0 84 75 59
Flagstaff, AZ 0 0 0 0 0 31 70 38 6 0 0 0 145 80 54
Hartford, CT 0 0 0 0 27 125 270 210 45 0 0 0 677 85 72
Indianapolis, IN 0 0 0 0 96 212 322 260 106 18 0 0 1014 87 73
Juneau, AK 0 0 0 0 0 0 0 0 0 0 0 0 0 67 57
Kansas City, MO 0 0 0 10 107 253 419 350 131 18 0 0 1288 93 74
Los Angeles, AP, CA 0 8 7 11 25 75 136 176 169 88 25 7 727 77 67
Los Angeles, C.O., CA 14 32 36 77 97 176 293 316 271 162 45 18 1537 86 69
Miami, FL 156 149 221 306 425 492 546 552 507 412 264 168 4198 89 77
Milwaukee, WI 0 0 0 0 16 82 197 160 24 0 0 0 479 84 71
Minneapolis-St. Paul, MN 0 0 0 0 43 137 278 192 32 0 0 0 682 86 71
New York (La Guardia), NY 0 0 0 0 44 191 353 322 125 17 0 0 1052 87 72
Oklahoma City, OK 0 0 9 38 136 351 527 499 255 44 0 0 1859 95 73
Omaha (North), NE 0 0 0 6 75 218 357 287 84 10 0 0 1037 88 74
Philadelphia, PA 0 0 0 0 58 209 363 326 128 17 0 0 1101 87 72
Phoenix, AZ 8 22 95 222 436 696 884 822 618 311 41 7 4162 105 71
Pittsburgh, PA 0 0 0 0 44 123 227 184 67 9 0 0 654 84 70
Portland, AP, OR 0 0 0 0 0 46 127 147 51 0 0 0 371 82 65
Salt Lake City, UT 0 0 0 0 23 174 400 329 114 7 0 0 1047 92 61
San Francisco, C.O., CA 0 0 0 0 0 0 0 0 35 30 0 0 65 69 61
Seattle (SEA-TAC), WA 0 0 0 0 0 21 64 81 24 0 0 0 190 76 62
St. Louis, MO 0 0 0 17 145 312 459 391 177 33 0 0 1534 91 74
Syracuse, NY 0 0 0 0 23 70 178 133 34 0 0 0 438 84 70
Tampa, FL 76 62 130 196 384 489 539 539 477 304 147 84 3427 90 76
Washington (Dulles), D.C. 0 0 0 0 53 187 329 285 107 12 0 0 973 N/A N/A
Washington (Nat’l), D.C. 0 0 0 9 104 318 465 419 203 31 0 0 1549 89 74
Wichita, KS 0 0 0 20 121 326 508 443 188 22 0 0 1628 96 73
AP = Airport
C.O. = City Office
Cooling Degree Days Data are excerpts from Comparative Climatic Data for the United States through 1995,
National Climatic Data Center, Asheville, NC.
Cooling Design Dry-Bulb and Average Wet-Bulb Temperatures are excerpts from ASHRAE Handbook 1993 Fundamentals.