Slightly less hot than Thursday. Map of forecast high temperatures for Friday Aug 08, 2025. For the coastal areas: 76 to 84, western valleys and inland Orange County: 84 to 92, inland valleys: 91 to 102, mountains between 4000 ft and 7000 ft: 83 to 94, high desert: 98 to 105, low desert: 110 to 114.