Home Automation on Sensor and Time

Hi, I wanted to start the central heating if the temperature is below a certain level, I am home and the time is in a range. I created an automation but it didn't fire. I think it's because the sensor condition is "Temperature Drops Below" not "Temperature Is Below". In other words because the temperature was already below the level at the time the time window opened, the automation didn't fire. Does that sound correct? If so is it possible to do what I want which is to turn on the heating in the morning if it is cold?

Home Automation on Sensor and Time
 
 
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