North Carolina design temperatures
Outdoor heating and cooling design conditions for 10 North Carolina 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 |
|---|---|---|---|---|---|---|
| AshevilleWMO 723150 · 1973–1996 | 2,169 ft | 11 °F | 16 °F | 86 / 72 °F | 88 / 72 °F | Load calculator |
| Cape HatterasWMO 723040 · 1973–1996 | 10 ft | 25 °F | 28 °F | 87 / 78 °F | 88 / 78 °F | Load calculator |
| Charlotte/DouglasWMO 723140 · 1973–1996 | 768 ft | 19 °F | 23 °F | 91 / 74 °F | 94 / 75 °F | Load calculator |
| Cherry Point MCASWMO 723090 · 1973–1996 | 30 ft | 22 °F | 26 °F | 91 / 78 °F | 93 / 78 °F | Load calculator |
| Fort Bragg/SimmonsWMO 746930 · 1967–1996 | 243 ft | 20 °F | 24 °F | 93 / 76 °F | 95 / 77 °F | Load calculator |
| Greensboro/PiedmontWMO 723170 · 1973–1996 | 886 ft | 14 °F | 19 °F | 90 / 74 °F | 93 / 75 °F | Load calculator |
| New River MCASWMO 723096 · 1973–1996 | 26 ft | 21 °F | 26 °F | 92 / 78 °F | 94 / 78 °F | Load calculator |
| Pope AFBWMO 723030 · 1967–1996 | 217 ft | 19 °F | 23 °F | 93 / 76 °F | 95 / 76 °F | Load calculator |
| Raleigh-DurhamWMO 723060 · 1973–1996 | 440 ft | 16 °F | 20 °F | 91 / 75 °F | 93 / 76 °F | Load calculator |
| Seymour-Johnson AFBWMO 723066 · 1967–1996 | 108 ft | 20 °F | 24 °F | 92 / 76 °F | 95 / 77 °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.