It was another chilly night in San Diego County as a frost advisory remains in effect for San Diego Valleys a day after some parts of the county tied previous record lows.
The city of San Diego's 39-degree temperature reading overnight Monday tied its record-low from last Feb. 16, according to the National Weather Service. Anything 32 degrees or below is considered freezing.
Other parts of the county came within a few degrees of beating their previous records, like Oceanside with a 32-degree low (record of 31 degrees set on Feb. 19, 2023), Ramona's 21-degree temp (record of 19 degrees set on Feb. 5, 2020), and Alpine's 34-degree reading (record of 32 degrees set on April 4, 2023).
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A frost advisory is in place until 9 a.m. Tuesday in the San Diego County valleys and deserts, including the cities of Escondido, El Cajon and San Marcos.
Temperatures could drop into the low- to mid-30s in the affected areas, NBC 7 Meteorologist Sheena Parveen said.
"Frost could kill sensitive outdoor vegetation if left uncovered," the NWS warned. "Take steps now to protect tender plants from the cold."
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Once the sun comes up, temperatures will jump 20 to 30 degrees but remain relatively cool with high temperatures mostly in the low to mid-60s west of the mountains, according to NBC 7 Meteorologist Greg Bledsoe.
The cool weather was expected to continue through Tuesday, but the gusting winds that have been impacting many areas were expected to weaken. A slight warming trend was anticipated by midweek.
Later this week, a storm system bringing rain and snow to Northern California will make its way south. By late Wednesday or early Thursday, it's possible some light showers could reach our area, NBC 7 Meteorologist Sheena Parveen said, who is also tracking another storm system that could bring some chances for rain Sunday.
