Spring 2019 over three weeks early in central England

According to my method of calculating the first day of spring using accumulated mean temperatures, the first day of spring was thanks to a record very mild end to February, was over three weeks early on the 26th of February this year (2019). Not a record, but nonetheless very early and forcing the linear trend from 1772 down slightly steeper, so that springs on average are arriving 20 days earlier than they did 247 years ago.

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