Kentucky design temperatures
Outdoor heating and cooling design conditions for 5 Kentucky 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 |
|---|---|---|---|---|---|---|
| Cincinnati/CovingtonWMO 724210 · 1973–1996 | 876 ft | 0 °F | 7 °F | 89 / 74 °F | 91 / 75 °F | Load calculator |
| Fort Campbell (AAF)WMO 746710 · 1967–1996 | 571 ft | 8 °F | 14 °F | 92 / 76 °F | 94 / 77 °F | Load calculator |
| Fort Knox/GodmanWMO 724240 · 1967–1996 | 755 ft | 5 °F | 12 °F | 90 / 75 °F | 92 / 76 °F | Load calculator |
| Lexington/BluegrassWMO 724220 · 1973–1996 | 988 ft | 4 °F | 10 °F | 89 / 74 °F | 91 / 75 °F | Load calculator |
| Louisville/StandifordWMO 724230 · 1973–1996 | 489 ft | 6 °F | 12 °F | 91 / 76 °F | 93 / 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.