Cooling and Dehumidification Design Conditions for Illinois

City Lat. Long. Elev. Std. Pres. Cooling DB / MCWB WB / MCDB DP / MCDB and HR Range of DB
0.4% 1% 2% 0.4% 1% 2% 0.4% 1% 2%
°N °W Feet psia DB MCWB DB MCWB DB MCWB WB MCDB WB MCDB WB MCDB DP HR MCDB DP HR MCDB DP HR MCDB
Belleville, Scott AFB 38.55 89.85 453 14.457 95 78 93 77 90 76 80 92 78 90 77 88 77 141 87 76 136 85 74 131 84 19.8
Chicago, Meigs Field 41.78 87.75 623 14.367 92 74 89 73 86 71 77 88 76 85 74 83 74 132 84 72 121 80 71 115 80 16.0
Chicago, O’Hare Int’l A 41.98 87.90 673 14.342 91 74 88 73 86 71 77 88 75 85 74 83 74 130 84 72 123 82 71 115 80 19.6
Decatur 39.83 88.87 682 14.337 94 76 91 75 88 74 79 90 78 89 76 86 76 140 86 75 133 84 73 127 83 20.0
Glenview, NAS 42.08 87.82 653 14.352 93 75 89 73 87 71 78 90 76 87 74 84 74 130 85 72 120 82 70 113 81 17.6
Marseilles 41.37 88.68 738 14.308 93 74 89 73 86 71 78 89 76 86 74 84 75 135 85 73 126 82 71 117 81 19.4
Moline/Davenport IA 41.45 90.52 594 14.383 93 76 90 74 87 73 78 90 77 87 75 85 75 134 85 73 127 83 72 120 82 20.0
Peoria 40.67 89.68 663 14.347 92 76 89 74 86 73 78 89 77 86 75 84 75 137 85 74 130 83 72 123 81 19.5
Quincy 39.95 91.20 768 14.292 94 76 91 75 88 74 78 89 77 88 76 85 76 138 84 74 132 82 73 126 82 18.9
Rockford 42.20 89.10 741 14.306 91 74 88 73 85 71 77 87 75 85 74 82 74 132 84 73 124 81 71 116 79 19.8
Springfield 39.85 89.67 614 14.373 93 76 91 75 88 74 79 89 77 88 76 85 76 139 86 75 132 84 73 125 82 19.4
West Chicago 41.92 88.25 758 14.297 91 75 88 74 86 72 78 88 76 85 74 83 76 138 85 74 130 83 71 119 80 19.8