As Californians enjoy a relatively stable weather pattern, the National Weather Service in San Diego provides insights into what residents can expect in the coming days. NWS San Diego reports that today's high temperatures will mirror Friday, with coastal areas ranging from 64 to 73 degrees. Inland valleys and Orange County can anticipate highs between 71 to 77 degrees, while the mountains at 4000 to 7000 feet will experience cooler temperatures of 59 to 68 degrees.

As we head into Sunday, conditions are forecasted to heat up. The western valleys, inland Orange County, and inland valleys can expect a rise in mercury, with highs hovering some 5 to 10 degrees above the seasonal average, often reaching into the 70s and low 80s. In contrast, the coastal areas will see temperatures remain in the mid-60s to low 70s. Meanwhile, the mountains and deserts will also trend warmer, as indicated in the latest NWS update.

Monday is the week's warmest day, particularly for the coastal basin, with temperatures soaring 10-20 degrees above average. For those in inland areas west of the mountains, Tuesday will offer a slight reprieve from the heat, although the low deserts are still expected to reach their peak temperatures for the week, with some areas potentially hitting the upper nineties. These predictions underscore the variability typical of Californian microclimates.

From an Area Forecast Discussion released by the NWS, it's been noted that high temperatures for Sunday are expected to exceed seasonal averages, particularly for regions away from the coast. Inland areas such as the Inland Empire may see temps climb to the low 80s. In the mountainous regions and high deserts, residents can anticipate comfortable conditions in the 80s, with cooler temperatures held forth by the immediate coast in the 70s and beaches near 70. Tuesday witnesses a shift when a low-pressure trough moves in from the southwest, increasing onshore flows and initiating an inland cooling trend.