Arizona design temperatures
Outdoor heating and cooling design conditions for 8 Arizona weather stations. Choose the station nearest to you in distance and elevation, and check whether your building department specifies its own values.
| Station | Elevation | 99.6 % heating | 99 % heating | 1 % cooling / MCWB | 0.4 % cooling / MCWB | Use it |
|---|---|---|---|---|---|---|
| Davis-Monthan AFBWMO 722745 · 1967–1996 | 2,704 ft | 33 °F | 35 °F | 102 / 66 °F | 104 / 66 °F | Load calculator |
| FlagstaffWMO 723755 · 1973–1996 | 7,011 ft | 3 °F | 9 °F | 84 / 56 °F | 86 / 56 °F | Load calculator |
| Fort Huachuca/LibbyWMO 722730 · 1967–1996 | 4,718 ft | 29 °F | 32 °F | 95 / 62 °F | 97 / 62 °F | Load calculator |
| Luke AFB/PhoenixWMO 722785 · 1967–1996 | 1,089 ft | 35 °F | 38 °F | 108 / 71 °F | 110 / 71 °F | Load calculator |
| Phoenix/Sky HarborWMO 722780 · 1973–1996 | 1,106 ft | 37 °F | 40 °F | 108 / 70 °F | 110 / 70 °F | Load calculator |
| TucsonWMO 722740 · 1973–1996 | 2,556 ft | 32 °F | 34 °F | 103 / 66 °F | 106 / 66 °F | Load calculator |
| WinslowWMO 723740 · 1973–1996 | 4,882 ft | 8 °F | 14 °F | 94 / 60 °F | 97 / 61 °F | Load calculator |
| YumaWMO 722800 · 1973–1996 | 207 ft | 40 °F | 43 °F | 109 / 73 °F | 111 / 73 °F | Load calculator |
Using these values
- Heat-loss calculations for homes commonly use the 99 % heating value, and cooling loads the 1 % dry bulb with its mean coincident wet bulb (MCWB). The 99.6 % and 0.4 % values are more conservative.
- “Load calculator” opens the heating and cooling load calculator with that station’s 99 % and 1 % temperatures and its design moisture difference (outdoor air at the 1 % condition versus 75 °F, 50 % RH indoors, at the station’s elevation).
- Source: U.S. Air Force Combat Climatology Center and NOAA National Climatic Data Center, Engineering Weather Data (1999; public domain). Each station’s period of record is shown under its name; they end by 1996, and the climate has warmed since, so check local requirements before relying on a value for a permit.