Heating and Wind Design Conditions for Iowa
City | Lat. | Long. | Elev. | Std. Pres. | Heating Dry Bulb, °F | Extreme Wind Speed, mph | Coldest Month WS / MCDB | MCWS / MCWD to DB | Annual Extreme Daily | ||||||||||||
0.4% | 1% | 99.6% | 0.4% | Mean DB | Std. DB | ||||||||||||||||
°N | °W | Feet | psia | 99.6% | 99% | 1% | 2.5% | 5% | WS | MCDB | WS | MCDB | MCWS | PWD | MCWS | PWD | Max | Min | Max | Min | |
Burlington | 40.78 | 91.13 | 699 | 14.328 | -4 | 1 | 21 | 19 | 17 | 24 | 12 | 21 | 18 | 9 | 310 | 11 | 200 | 98 | -10 | 4.0 | 6.8 |
Cedar Rapids | 41.88 | 91.70 | 869 | 14.240 | -11 | -5 | 25 | 22 | 20 | 29 | 12 | 26 | 14 | 10 | 300 | 11 | 180 | 96 | -15 | 3.6 | 5.4 |
Des Moines | 41.53 | 93.65 | 965 | 14.190 | -9 | -4 | 27 | 24 | 21 | 28 | 14 | 24 | 19 | 11 | 320 | 12 | 180 | 98 | -15 | 3.4 | 5.1 |
Fort Dodge | 42.55 | 94.18 | 1165 | 14.087 | -13 | -7 | 27 | 23 | 21 | 29 | 10 | 26 | 10 | 11 | 340 | 11 | 190 | 96 | -17 | 4.9 | 4.9 |
Lamoni | 40.62 | 93.95 | 1122 | 14.109 | -6 | 0 | 19 | 17 | 15 | 21 | 23 | 19 | 20 | 7 | 320 | 9 | 210 | 99 | -12 | 4.3 | 6.8 |
Mason City | 43.15 | 93.33 | 1214 | 14.062 | -15 | -10 | 27 | 23 | 22 | 30 | 9 | 27 | 12 | 12 | 300 | 14 | 200 | 97 | -23 | 3.6 | 11.4 |
Ottumwa | 41.10 | 92.45 | 846 | 14.251 | -5 | 0 | 29 | 26 | 23 | 31 | 20 | 28 | 24 | 13 | 320 | 15 | 200 | 98 | -12 | 4.0 | 6.8 |
Sioux City | 42.40 | 96.38 | 1102 | 14.119 | -11 | -6 | 29 | 25 | 22 | 31 | 14 | 28 | 16 | 11 | 320 | 14 | 180 | 99 | -18 | 3.6 | 4.7 |
Spencer | 43.17 | 95.15 | 1339 | 13.998 | -16 | -11 | 24 | 22 | 20 | 25 | 13 | 23 | 13 | 10 | 300 | 12 | 180 | 99 | -20 | 6.3 | 4.0 |
Waterloo | 42.55 | 92.40 | 879 | 14.234 | -14 | -9 | 27 | 24 | 22 | 29 | 10 | 25 | 13 | 9 | 300 | 13 | 180 | 96 | -20 | 3.5 | 5.9 |