Cooling and Dehumidification Design Conditions for Montana

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 Feet psia DB MCWB DB MCWB DB MCWB WB MCDB WB MCDB WB MCDB DP HR MCDB DP HR MCDB DP HR MCDB
Billings 45.80 108.53 3570 12.896 93 63 90 62 87 61 65 86 64 84 62 83 59 83 71 57 78 71 55 74 70 25.8
Bozeman 45.78 111.15 4475 12.469 91 61 87 60 85 59 64 83 62 82 61 81 58 83 69 56 78 67 53 71 66 31.7
Butte 45.95 112.50 5545 11.980 86 57 84 56 80 55 60 76 58 76 57 76 54 76 61 52 70 63 50 66 62 31.5
Cut Bank 48.60 112.37 3855 12.760 87 60 84 59 80 58 62 81 60 79 59 77 56 77 67 54 70 65 51 65 63 26.1
Glasgow 48.22 106.62 2297 13.516 94 64 90 63 86 62 68 85 66 83 64 82 62 91 74 60 83 71 58 77 69 25.3
Great Falls, Int’l Airport 47.48 111.37 3658 12.854 92 61 88 60 85 59 64 84 62 82 61 81 57 81 69 55 74 67 53 69 66 27.2
Great Falls, Malmstrom AFB 47.50 111.18 3527 12.917 93 62 89 61 86 60 65 85 63 83 62 81 59 84 71 57 78 69 54 71 68 26.3
Havre 48.55 109.77 2598 13.367 94 63 90 62 86 61 66 87 64 84 62 82 60 84 72 58 78 69 56 74 68 27.9
Helena 46.60 112.00 3898 12.740 90 60 87 59 84 59 63 82 61 81 60 80 57 80 68 55 73 66 52 68 66 28.0
Kalispell 48.30 114.27 2972 13.184 89 62 86 61 82 60 65 83 63 81 61 79 59 82 69 57 76 67 55 71 67 29.9
Lewistown 47.05 109.47 4167 12.613 89 61 86 60 82 59 64 81 63 80 61 78 58 85 71 56 79 69 54 74 67 28.3
Miles City 46.43 105.87 2628 13.352 97 66 93 65 90 64 69 89 67 86 66 84 63 95 76 61 88 75 59 82 73 25.9
Missoula 46.92 114.08 3189 13.079 91 62 88 61 85 60 65 84 63 82 62 81 58 82 68 56 76 68 55 71 66 31.3