Texas design temperatures
Outdoor heating and cooling design conditions for 33 Texas 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 |
|---|---|---|---|---|---|---|
| AbileneWMO 722660 · 1973–1996 | 1,791 ft | 16 °F | 22 °F | 97 / 71 °F | 99 / 71 °F | Load calculator |
| AmarilloWMO 723630 · 1973–1996 | 3,606 ft | 6 °F | 12 °F | 94 / 66 °F | 97 / 67 °F | Load calculator |
| Austin/MuellerWMO 722540 · 1973–1996 | 620 ft | 25 °F | 30 °F | 97 / 75 °F | 99 / 75 °F | Load calculator |
| Beaumont/Port ArthurWMO 722410 · 1973–1996 | 23 ft | 29 °F | 32 °F | 92 / 79 °F | 94 / 79 °F | Load calculator |
| Bergstrom AFB/AustinWMO 722545 · 1967–1996 | 541 ft | 26 °F | 30 °F | 97 / 76 °F | 99 / 76 °F | Load calculator |
| BrownsvilleWMO 722500 · 1973–1996 | 20 ft | 35 °F | 40 °F | 94 / 78 °F | 95 / 78 °F | Load calculator |
| Chase NAS/BeevilleWMO 722556 · 1973–1992 | 190 ft | 29 °F | 33 °F | 97 / 77 °F | 99 / 77 °F | Load calculator |
| Corpus ChristiWMO 722510 · 1973–1996 | 43 ft | 32 °F | 36 °F | 94 / 78 °F | 95 / 78 °F | Load calculator |
| Corpus Christi NASWMO 722515 · 1973–1996 | 20 ft | 35 °F | 39 °F | 92 / 79 °F | 93 / 79 °F | Load calculator |
| Dallas NAS/HensleyWMO 722585 · 1973–1996 | 492 ft | 19 °F | 25 °F | 98 / 75 °F | 100 / 75 °F | Load calculator |
| Dallas/Ft WorthWMO 722590 · 1973–1996 | 597 ft | 19 °F | 24 °F | 98 / 75 °F | 100 / 75 °F | Load calculator |
| Dallas/LoveWMO 722580 · 1973–1996 | 486 ft | 20 °F | 25 °F | 98 / 76 °F | 100 / 76 °F | Load calculator |
| Del RioWMO 722610 · 1973–1996 | 1,007 ft | 29 °F | 33 °F | 99 / 72 °F | 100 / 72 °F | Load calculator |
| Dyess AFB/AbileneWMO 690190 · 1967–1996 | 1,788 ft | 18 °F | 22 °F | 98 / 72 °F | 100 / 72 °F | Load calculator |
| El PasoWMO 722700 · 1972–1996 | 3,918 ft | 21 °F | 25 °F | 99 / 64 °F | 102 / 65 °F | Load calculator |
| Fort Hood/Gray AAFWMO 722576 · 1967–1996 | 1,014 ft | 23 °F | 27 °F | 97 / 74 °F | 99 / 74 °F | Load calculator |
| Fort Worth NASWMO 722595 · 1967–1996 | 650 ft | 20 °F | 25 °F | 98 / 75 °F | 100 / 75 °F | Load calculator |
| Galveston/ScholesWMO 722422 · 1973–1991 | 52 ft | 32 °F | 35 °F | 90 / 78 °F | 91 / 79 °F | Load calculator |
| Houston/EllingtonWMO 722436 · 1967–1996 | 33 ft | 30 °F | 34 °F | 93 / 78 °F | 95 / 79 °F | Load calculator |
| Houston/IntercontinentalWMO 722430 · 1973–1996 | 108 ft | 27 °F | 31 °F | 95 / 77 °F | 97 / 77 °F | Load calculator |
| Kelly AFBWMO 722535 · 1967–1996 | 689 ft | 28 °F | 32 °F | 97 / 74 °F | 99 / 75 °F | Load calculator |
| Kingsville NASWMO 722516 · 1973–1996 | 49 ft | 32 °F | 36 °F | 96 / 78 °F | 97 / 78 °F | Load calculator |
| Laughlin AFBWMO 722615 · 1967–1996 | 1,083 ft | 29 °F | 33 °F | 100 / 73 °F | 102 / 74 °F | Load calculator |
| LubbockWMO 722670 · 1973–1996 | 3,242 ft | 12 °F | 17 °F | 96 / 67 °F | 98 / 67 °F | Load calculator |
| Lufkin/AngelinaWMO 722446 · 1973–1996 | 289 ft | 23 °F | 28 °F | 94 / 77 °F | 96 / 77 °F | Load calculator |
| MidlandWMO 722650 · 1973–1996 | 2,861 ft | 18 °F | 22 °F | 97 / 67 °F | 100 / 68 °F | Load calculator |
| Randolph AFBWMO 722536 · 1967–1996 | 761 ft | 27 °F | 31 °F | 96 / 74 °F | 98 / 74 °F | Load calculator |
| Reese AFB/LubbockWMO 722675 · 1967–1996 | 3,337 ft | 14 °F | 19 °F | 97 / 68 °F | 100 / 68 °F | Load calculator |
| San Angelo/MathisWMO 722630 · 1973–1996 | 1,910 ft | 19 °F | 24 °F | 97 / 70 °F | 99 / 71 °F | Load calculator |
| San AntonioWMO 722530 · 1973–1996 | 794 ft | 26 °F | 30 °F | 96 / 74 °F | 98 / 74 °F | Load calculator |
| Tyler/PoundsWMO 722448 · 1973–1996 | 545 ft | 20 °F | 26 °F | 97 / 76 °F | 99 / 76 °F | Load calculator |
| Waco-Madison CooperWMO 722560 · 1973–1996 | 509 ft | 21 °F | 26 °F | 99 / 75 °F | 101 / 75 °F | Load calculator |
| Wichita FallsWMO 723510 · 1973–1996 | 1,030 ft | 13 °F | 19 °F | 100 / 74 °F | 102 / 74 °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.