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