Updated map showing climate stations that have ever recorded their lowest temp of the season (no ties) on April 8th or later. Note: additional Alaska stations had their lowest temp on or after Apr 8 but do not yet qualify as a climate station. #akwx @NWSAlaska @AlaskaWx
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All those California dots really surprise me. Coldest temperatures around here (San Francisco Peninsula) are usually around the New Year.

Apr 13, 2021 · 4:11 AM UTC

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... or are those stations where the coldest temperature was in December? That would make more sense.
It's not super common, but some years, the coldest California temps are indeed in April.
Here are the dots in the Bay Area.
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OK, so all the dots within 60 miles of me are either mountaintops or right on the ocean. At least they're all unusual stations as far as I'm concerned...
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