Heating and Wind Design Conditions for Illinois
City | Lat. | Long. | Elev. | Std. Pres. | Heating Dry Bulb, °C | Extreme Wind Speed, m/s | Coldest Month WS / MCDB | MCWS / MCWD to DB | Annual Extreme Daily | ||||||||||||
0.4% | 1% | 99.6% | 0.4% | Mean DB | Std. DB | ||||||||||||||||
°N | °W | Meters | kPa | 99.6% | 99% | 1% | 2.5% | 5% | WS | MCDB | WS | MCDB | MCWS | PWD | MCWS | PWD | Max | Min | Max | Min | |
Belleville, Scott AFB | 38.55 | 89.85 | 138 | 99.68 | -16.2 | -12.4 | 9.3 | 8.0 | 6.9 | 10.2 | 0.0 | 9.1 | -0.8 | 3.2 | 360 | 3.1 | 190 | 37.5 | -19.5 | 1.7 | 4.0 |
Chicago, Meigs Field | 41.78 | 87.75 | 190 | 99.06 | -20.0 | -16.1 | 10.4 | 9.6 | 8.7 | 11.4 | -8.2 | 10.1 | -1.0 | 5.4 | 240 | 5.6 | 220 | 36.0 | -23.4 | 1.8 | 4.5 |
Chicago, O’Hare Int’l A | 41.98 | 87.90 | 205 | 98.89 | -21.2 | -18.1 | 11.7 | 10.4 | 9.2 | 12.0 | -4.6 | 10.4 | -4.9 | 4.6 | 270 | 5.4 | 230 | 35.4 | -24.6 | 1.6 | 3.6 |
Decatur | 39.83 | 88.87 | 208 | 98.85 | -19.0 | -15.9 | 10.8 | 9.8 | 9.1 | 12.0 | -4.2 | 10.5 | -2.8 | 5.7 | 310 | 5.2 | 210 | 37.0 | -23.2 | 3.2 | 4.0 |
Glenview, NAS | 42.08 | 87.82 | 199 | 98.96 | -19.7 | -15.7 | 9.7 | 8.4 | 7.4 | 10.1 | -8.4 | 9.0 | -4.0 | 4.7 | 250 | 4.3 | 240 | 36.4 | -23.6 | 1.7 | 4.3 |
Marseilles | 41.37 | 88.68 | 225 | 98.65 | -20.4 | -17.3 | 11.4 | 10.0 | 8.9 | 12.6 | -7.6 | 11.2 | -6.0 | 5.2 | 290 | 4.5 | 250 | 35.4 | -24.1 | 2.2 | 3.3 |
Moline/Davenport IA | 41.45 | 90.52 | 181 | 99.17 | -22.4 | -19.3 | 11.6 | 10.1 | 9.0 | 12.7 | -8.7 | 10.8 | -8.0 | 4.2 | 290 | 5.2 | 200 | 36.2 | -25.7 | 1.5 | 3.3 |
Peoria | 40.67 | 89.68 | 202 | 98.92 | -21.1 | -18.1 | 11.0 | 9.7 | 8.7 | 11.7 | -8.7 | 10.1 | -7.2 | 4.1 | 290 | 4.9 | 180 | 35.4 | -24.6 | 1.8 | 3.4 |
Quincy | 39.95 | 91.20 | 234 | 98.55 | -19.9 | -16.6 | 10.8 | 9.6 | 8.8 | 12.5 | -5.0 | 10.7 | -5.6 | 5.4 | 330 | 5.2 | 210 | 36.2 | -23.3 | 2.0 | 4.5 |
Rockford | 42.20 | 89.10 | 226 | 98.64 | -23.1 | -20.1 | 11.4 | 10.0 | 9.1 | 11.4 | -7.6 | 10.0 | -6.9 | 3.9 | 290 | 5.6 | 200 | 35.1 | -26.6 | 1.7 | 3.1 |
Springfield | 39.85 | 89.67 | 187 | 99.10 | -19.7 | -16.6 | 11.7 | 10.4 | 9.4 | 12.0 | -3.8 | 10.5 | -2.8 | 4.5 | 270 | 5.3 | 230 | 36.2 | -23.9 | 1.6 | 3.1 |
West Chicago | 41.92 | 88.25 | 231 | 98.58 | -21.6 | -18.0 | 10.3 | 9.3 | 8.4 | 11.1 | -10.3 | 10.1 | -6.6 | 5.1 | 290 | 4.8 | 240 | 35.6 | -25.5 | 1.8 | 4.3 |