A developing trough along the West Coast Sunday was expected to keep the weather cool west of San Diego County mountains, with night and morning low clouds and patchy fog through Tuesday, the National Weather Service said.
Marine layer low cloudiness and inland valley patchy fog was extensive overnight, but was quickly clearing Sunday, forecasters said.
"We expect clearing to continue into the afternoon with sunshine over all areas this afternoon," the NWS said. "Slight chance a few beaches could maintain some cloudiness."
High temperatures along the coast Sunday were predicted to be 65-70 degrees with overnight lows of 50-55. Western valley highs will be 67-72 and near the foothills 71-76 with overnight lows of 47-52. Mountain highs were expected to be 68-76 with overnight lows of 42-50. Highs in the deserts will be around 86 with overnight lows of 55-62.
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At the beaches, high tides near 6.5 feet were expected Sunday, though the tidal overflow threat was low. Tides were expected to decrease Monday and Tuesday.
Some drizzle was possible again early Wednesday morning, but otherwise, dry weather was predicted to prevail. Winds were likely to turn offshore during the latter half of the week, with Santa Ana conditions beginning on Thursday.
Friday should be the warmest day overall, with temperatures some 10 to 15 degrees above average over the coast and valleys.