Weather skip logic

Hi all-

I have weather skip set up for temps below 32 degrees. My weather data comes from a weather station on my property.

I have a temporary hourly schedule established for some new sod I installed.

This morning I woke up to a frozen lawn and apparently no skips. The temp dropped to 25 and ran several times.

Does the skip just go off forecast (low was 33 on forecast) or actual data real time?