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San Diego Heat Peaks Early Week Before Sharp Midweek Cooldown and Rain Chances

Forecasters cite elevated fire danger from low humidity and easterly gusts.

Overview

  • Highs run 12–17 degrees above normal through Tuesday, with many inland spots reaching the upper 80s to low 90s.
  • Several inland and mountain locations could approach daily records early in the week, including Ramona, Borrego Springs and Palomar Mountain.
  • Low relative humidity of 10–20% and weak Santa Ana winds are creating elevated fire-weather conditions in foothills and eastern valleys, according to the National Weather Service.
  • Gusts of 25–40 mph are possible along coastal slopes and through passes, with 30–35 mph in inland valleys and mountains Sunday and Monday.
  • Temperatures trend down starting Wednesday, with coastal highs in the 60s by Thursday (San Diego near 68°F) and shower chances increasing from Thursday into next weekend.