California design temperatures
Outdoor heating and cooling design conditions for 44 California 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 |
|---|---|---|---|---|---|---|
| Alameda (Formerly NAS)WMO 745060 · 1973–1996 | 13 ft | 41 °F | 42 °F | 79 / 63 °F | 84 / 65 °F | Load calculator |
| Arcata/EurekaWMO 725945 · 1973–1996 | 217 ft | 30 °F | 32 °F | 67 / 59 °F | 70 / 60 °F | Load calculator |
| Bakersfield/MeadowsWMO 723840 · 1973–1996 | 492 ft | 33 °F | 35 °F | 102 / 70 °F | 104 / 71 °F | Load calculator |
| Barstow-DaggettWMO 723815 · 1973–1996 | 1,926 ft | 29 °F | 33 °F | 106 / 68 °F | 109 / 69 °F | Load calculator |
| Beale AFB/MarysvilleWMO 724837 · 1967–1996 | 112 ft | 32 °F | 34 °F | 98 / 69 °F | 101 / 70 °F | Load calculator |
| Blue CanyonWMO 725845 · 1973–1996 | 5,286 ft | 20 °F | 23 °F | 81 / 58 °F | 84 / 59 °F | Load calculator |
| Camp Pendleton MCASWMO 722926 · 1973–1996 | 79 ft | 35 °F | 37 °F | 89 / 67 °F | 94 / 68 °F | Load calculator |
| Castle AFB/MercedWMO 724810 · 1967–1995 | 187 ft | 30 °F | 32 °F | 98 / 69 °F | 100 / 70 °F | Load calculator |
| Crescent CityWMO 725946 · 1973–1996 | 56 ft | 35 °F | 37 °F | 67 / 59 °F | 70 / 60 °F | Load calculator |
| Edwards AFBWMO 723810 · 1967–1996 | 2,303 ft | 23 °F | 26 °F | 102 / 65 °F | 104 / 66 °F | Load calculator |
| FresnoWMO 723890 · 1972–1996 | 328 ft | 30 °F | 33 °F | 101 / 70 °F | 104 / 71 °F | Load calculator |
| ImperialWMO 747185 · 1973–1996 | -56 ft | 34 °F | 37 °F | 109 / 73 °F | 111 / 73 °F | Load calculator |
| Lemoore NAS/ReevesWMO 747020 · 1967–1996 | 236 ft | 29 °F | 32 °F | 101 / 71 °F | 104 / 72 °F | Load calculator |
| Long BeachWMO 722974 · 1977–1989 | 10 ft | 41 °F | 43 °F | 89 / 68 °F | 94 / 70 °F | Load calculator |
| Long Beach (Airport)WMO 722970 · 1973–1996 | 39 ft | 41 °F | 43 °F | 88 / 67 °F | 92 / 68 °F | Load calculator |
| Los Angeles IntlWMO 722950 · 1973–1996 | 105 ft | 44 °F | 46 °F | 81 / 64 °F | 85 / 64 °F | Load calculator |
| March ARB/RiversideWMO 722860 · 1967–1996 | 1,539 ft | 32 °F | 35 °F | 98 / 68 °F | 101 / 68 °F | Load calculator |
| Marina Municipal/FritzscheWMO 724916 · 1973–1993 | 135 ft | 35 °F | 37 °F | 75 / 61 °F | 79 / 62 °F | Load calculator |
| McClellan AFBWMO 724836 · 1967–1996 | 75 ft | 32 °F | 34 °F | 99 / 69 °F | 101 / 70 °F | Load calculator |
| Miramar NASWMO 722908 · 1973–1996 | 420 ft | 39 °F | 42 °F | 87 / 67 °F | 91 / 68 °F | Load calculator |
| Moffett Field NASWMO 745090 · 1973–1996 | 39 ft | 37 °F | 39 °F | 84 / 65 °F | 88 / 66 °F | Load calculator |
| Montague/SiskiyouWMO 725955 · 1973–1995 | 2,648 ft | 15 °F | 19 °F | 93 / 63 °F | 96 / 65 °F | Load calculator |
| MontereyWMO 724915 · 1973–1996 | 253 ft | 37 °F | 40 °F | 74 / 60 °F | 78 / 61 °F | Load calculator |
| North Island NASWMO 722906 · 1967–1996 | 26 ft | 45 °F | 47 °F | 80 / 66 °F | 84 / 66 °F | Load calculator |
| Norton AFB/San BernardinoWMO 722866 · 1964–1993 | 1,158 ft | 32 °F | 35 °F | 100 / 70 °F | 102 / 70 °F | Load calculator |
| OaklandWMO 724930 · 1973–1996 | 10 ft | 38 °F | 40 °F | 77 / 64 °F | 81 / 66 °F | Load calculator |
| OntarioWMO 722865 · 1973–1996 | 942 ft | 35 °F | 38 °F | 98 / 70 °F | 102 / 70 °F | Load calculator |
| Paso RoblesWMO 723965 · 1973–1996 | 837 ft | 26 °F | 29 °F | 98 / 67 °F | 102 / 68 °F | Load calculator |
| Pt MuguWMO 723910 · 1973–1996 | 7 ft | 39 °F | 41 °F | 79 / 63 °F | 83 / 62 °F | Load calculator |
| Pt PiedrasWMO 723900 · 1973–1995 | 69 ft | 41 °F | 43 °F | 73 / 61 °F | 76 / 63 °F | Load calculator |
| Red BluffWMO 725910 · 1973–1995 | 354 ft | 30 °F | 33 °F | 102 / 69 °F | 105 / 70 °F | Load calculator |
| Sacramento/ExecutiveWMO 724830 · 1973–1996 | 26 ft | 31 °F | 34 °F | 97 / 69 °F | 100 / 70 °F | Load calculator |
| Sacramento/MatherWMO 724835 · 1964–1993 | 95 ft | 30 °F | 33 °F | 98 / 68 °F | 101 / 69 °F | Load calculator |
| San ClementeWMO 722925 · 1973–1996 | 180 ft | 45 °F | 47 °F | 76 / 66 °F | 79 / 67 °F | Load calculator |
| San Diego/LindbergWMO 722900 · 1973–1996 | 30 ft | 45 °F | 47 °F | 82 / 68 °F | 85 / 68 °F | Load calculator |
| San FranciscoWMO 724940 · 1973–1996 | 16 ft | 38 °F | 40 °F | 79 / 62 °F | 83 / 63 °F | Load calculator |
| San JoseWMO 724945 · 1973–1996 | 56 ft | 36 °F | 39 °F | 90 / 67 °F | 94 / 67 °F | Load calculator |
| SandburgWMO 723830 · 1973–1995 | 4,524 ft | 15 °F | 25 °F | 89 / 60 °F | 92 / 61 °F | Load calculator |
| Santa BarbaraWMO 723925 · 1973–1996 | 10 ft | 35 °F | 38 °F | 80 / 64 °F | 83 / 64 °F | Load calculator |
| StocktonWMO 724920 · 1973–1996 | 26 ft | 30 °F | 33 °F | 98 / 69 °F | 101 / 70 °F | Load calculator |
| Travis AFB/FairfieldWMO 745160 · 1967–1996 | 62 ft | 32 °F | 34 °F | 95 / 68 °F | 98 / 68 °F | Load calculator |
| Tustin MCASWMO 722915 · 1976–1996 | 56 ft | 39 °F | 41 °F | 90 / 69 °F | 94 / 70 °F | Load calculator |
| Vandenberg AFBWMO 723930 · 1967–1996 | 367 ft | 37 °F | 40 °F | 77 / 60 °F | 81 / 61 °F | Load calculator |
| VictorvilleWMO 723825 · 1963–1992 | 2,874 ft | 26 °F | 29 °F | 99 / 65 °F | 101 / 65 °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.