Sweltering weekend heat surpasses record temperatures

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SAN DIEGO -- San Diegans endured another day of record-breaking heat Sunday, but forecasters said closer to average temperatures were just around the corner.

High pressure combined with weak offshore flow around the county translated to more unseasonable, sweltering heat, which again surpassed heat records by more than a dozen degrees in some areas, according to the National Weather Service.

Sunday's 93-degree high in Chula Vista and Vista crushed the previous records of 80 and 83, set in 1994 and 1978, respectively.

In San Diego, a high of 89 degrees topped the 37-year-old record by nine degrees. The mercury rose to 92 degree in El Cajon, five degrees over the record set one year ago, and 86-degree highs in Ramona and Alpine topped out over the old records of 84 and 83, set in 1976 and 2014, respectively.

At the Oceanside Harbor, thermometers hit the 81-degree mark, just one degree over the 97-year-old record. Temperatures in Escondido tied the 114-year-old high of 92 degrees, according to the weather service.

A weak low pressure system should lead to more tolerable weather later this week. Weather service forecasters said the cooling would begin along the coast on Monday then would move inland through the remainder of the week, lowering temperatures to around the seasonal average.