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 Meters kPa 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 89.85 138 99.68 35.1 25.3 33.9 24.8 32.2 24.6 26.6 33.1 25.8 32.1 25.2 31.1 24.8 20.2 30.6 24.2 19.4 29.7 23.6 18.7 29.0 11.0
Chicago, Meigs Field 41.78 87.75 190 99.06 33.5 23.6 31.5 22.7 30.1 21.7 25.2 31.1 24.2 29.5 23.3 28.4 23.6 18.9 28.7 22.2 17.3 26.9 21.4 16.4 26.7 8.9
Chicago, O’Hare Int’l A 41.98 87.90 205 98.89 32.8 23.6 31.3 22.8 29.7 21.9 25.1 31.0 24.1 29.5 23.1 28.1 23.3 18.6 28.9 22.4 17.5 27.8 21.4 16.4 26.6 10.9
Decatur 39.83 88.87 208 98.85 34.5 24.7 32.9 24.1 31.2 23.5 26.1 32.3 25.3 31.4 24.5 30.0 24.5 20.0 30.1 23.7 19.0 29.0 22.9 18.1 28.2 11.1
Glenview, NAS 42.08 87.82 199 98.96 34.1 23.8 31.9 22.8 30.4 21.8 25.3 32.2 24.3 30.3 23.2 28.7 23.4 18.6 29.5 22.1 17.2 28.0 21.2 16.2 27.3 9.8
Marseilles 41.37 88.68 225 98.65 33.8 23.6 31.7 23.0 30.2 21.9 25.5 31.6 24.4 30.1 23.5 28.8 23.9 19.3 29.4 22.8 18.0 27.6 21.6 16.7 27.2 10.8
Moline/Davenport IA 41.45 90.52 181 99.17 33.9 24.3 32.2 23.4 30.7 22.7 25.7 32.0 24.7 30.5 23.9 29.3 23.9 19.2 29.5 23.0 18.1 28.3 22.2 17.2 27.5 11.1
Peoria 40.67 89.68 202 98.92 33.3 24.3 31.7 23.4 30.2 22.8 25.8 31.6 24.9 30.1 23.9 29.0 24.1 19.5 29.2 23.3 18.5 28.3 22.4 17.6 27.2 10.8
Quincy 39.95 91.20 234 98.55 34.6 24.4 32.9 24.1 30.9 23.2 25.7 31.7 25.0 31.2 24.2 29.5 24.2 19.7 28.8 23.5 18.8 28.0 22.8 18.0 27.6 10.5
Rockford 42.20 89.10 226 98.64 32.6 23.5 31.0 22.6 29.6 21.7 25.1 30.7 24.1 29.2 23.1 27.8 23.5 18.8 28.8 22.5 17.7 27.3 21.5 16.6 26.2 11.0
Springfield 39.85 89.67 187 99.10 34.1 24.5 32.6 24.0 31.2 23.2 26.1 31.9 25.2 30.9 24.4 29.5 24.5 19.9 29.8 23.6 18.9 28.7 22.8 17.9 27.6 10.8
West Chicago 41.92 88.25 231 98.58 33.0 23.7 31.2 23.1 29.9 22.4 25.7 31.0 24.7 29.7 23.6 28.3 24.2 19.7 29.3 23.3 18.6 28.1 21.9 17.0 26.8 11.0