The clear, warm weather has meant beautiful sunsets of late, such as this one at Pismo Beach. But forecasts say fog will return to coastal areas overnight.
Daytime temperatures are also expected to fall from near 80 in San Luis Obispo to the low 70s.
Spring officially begins at 10:32 a.m., the moment of the vernal equinox, when day and night are about the same length.
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