Iowa Climate Data
We offer an Iowa Manual J for $79 in 4-6 hours. We can also offer Iowa Manual S $79 and Iowa Manual D $99.
Below is a collection of Iowa Climate Data and outdoor design conditions. We included an Iowa state average of each category at the bottom of the Manual J climate data table. We created this to allow an easy to use free resource for Manual J professionals to use on jobsites, in the field, and while calculating Manual J heat loss and heat gain reports. If you have a custom set of data from Iowa we would consider adding to the Iowa Climate Data table simply email it to plans@manualjs.com
We can also create a Manual J using climate data from the tables below. Email pdf plans, jobsite address, and square footage to plans@manualjs.com and we will get your Iowa Manual J taken care of.
| Iowa | Elevation in Feet | Latitude North Degrees | Heating 99% Outdoor Dry Bulb | Cooling Outdoor Air 1% Dry Bulb | Cooling Outdoor Air Coincident Wet Bulb | Cooling Design Grains 55% Relative Humidity Indoors | Cooling Design Grains 45% Relative Humidity Indoors | Cooling Design Grains 45% Relative Humidity Indoors | Daily Rating | Heating Design Days 65 degrees/Colling Design Days 50 degrees Ratio |
| Ames Municipal airport | 955 | 42 | 1 | 88 | 75 | 40 | 47 | 53 | M | 2.08 |
| Ankeny Regional airport | 902 | 42 | 0 | 91 | 74 | 32 | 39 | 46 | M | 1.73 |
| Atlantic | 1181 | 41 | 0 | 91 | 77 | 49 | 56 | 63 | M | 1.9 |
| Boone Municipal airport | 1161 | 42 | 0 | 90 | 77 | 49 | 56 | 63 | M | 1.99 |
| Burlington Municipal airport | 702 | 41 | 1 | 90 | 76 | 40 | 47 | 54 | M | 1.6 |
| Carroll | 1230 | 42 | 0 | 91 | 77 | 48 | 55 | 62 | M | 1.96 |
| Cedar Rapids Municipal airport | 873 | 42 | -4 | 89 | 75 | 37 | 44 | 51 | M | 2.22 |
| Chariton | 1050 | 41 | 3 | 91 | 78 | 56 | 63 | 70 | M | 1.61 |
| Charles City | 1125 | 43 | -3 | 88 | 76 | 49 | 56 | 63 | M | 2.44 |
| Clarion | 1161 | 43 | -4 | 90 | 76 | 47 | 54 | 61 | M | 2.31 |
| Clinton Municipal airport Automated Weather Observation System | 709 | 42 | 0 | 88 | 74 | 34 | 41 | 47 | M | 2.2 |
| Council Bluffs (Omaha, NB, DD) | 1253 | 41 | –3 | 91 | 75 | 37 | 44 | 50 | M | 1.76 |
| Creston | 1293 | 41 | 1 | 91 | 77 | 49 | 55 | 62 | M | 1.81 |
| Davenport Municipal airport | 850 | 42 | 1 | 88 | 75 | 43 | 50 | 57 | M | 1.99 |
| Des Moines international airport | 965 | 42 | -2 | 90 | 75 | 37 | 44 | 51 | M | 1.84 |
| Dubuque Regional airport | 1079 | 42 | -3 | 86 | 73 | 33 | 40 | 47 | M | 2.56 |
| Estherville Municipal airport | 1316 | 43 | -6 | 88 | 74 | 33 | 39 | 46 | M | 2.75 |
| Fair Field Municipal airport | 801 | 41 | 3 | 91 | 78 | 54 | 60 | 67 | M | 1.67 |
| Fort Dodge Automated Weather Observation System | 1165 | 43 | -6 | 88 | 74 | 33 | 39 | 46 | M | 2.48 |
| Iowa City | 661 | 41 | –6 | 89 | 76 | 45 | 52 | 58 | M | 1.69 |
| Keokuk Municipal airport | 673 | 40 | 8 | 91 | 78 | 52 | 59 | 66 | M | 1.4 |
| Lamoni | 1122 | 40 | 0 | 92 | 74 | 28 | 35 | 42 | M | 1.98 |
| Marshall Town Municipal airport | 971 | 42 | 0 | 88 | 75 | 41 | 48 | 55 | M | 2.26 |
| Mason City Municipal airport | 1224 | 43 | -8 | 88 | 74 | 32 | 39 | 46 | M | 2.84 |
| Newton 953 41 –5 | 91 | 74 | 30 | 37 | 43 | M | 2.04 | |||
| Ottumwa Industrial airport | 846 | 41 | 0 | 90 | 75 | 38 | 45 | 52 | M | 1.75 |
| Sioux City, Sioux Gateway airport | 1102 | 42 | -4 | 90 | 74 | 34 | 40 | 47 | M | 2.14 |
| Spencer | 1339 | 43 | -8 | 89 | 73 | 29 | 36 | 43 | M | 2.69 |
| Storm Lake | 1490 | 43 | -4 | 90 | 74 | 33 | 40 | 47 | M | 2.03 |
| Washington | 755 | 41 | 3 | 91 | 78 | 55 | 62 | 69 | M | 1.65 |
| Waterloo Municipal airport | 879 | 43 | -6 | 89 | 74 | 32 | 39 | 46 | M | 2.39 |
| Webster City | 1122 | 42 | 0 | 91 | 77 | 51 | 58 | 65 | M | 2.02 |
| Iowa State Average | 1001.4375 | 42.84375 | -0.2333333333 | 87.96875 | 74.40625 | 40.9677419355 | 46.37625 | 54.6774193548 | M | 2.0561290323 |
