Setting different thresholds for different time periods

Hello guys,
I have a question regarding setting Thresholds and Time Regions.

I want to do the following:
alert when temperature is below 19 degree between 7 am and 7 pm,
alert when temperature is below 15 degrees between 7 pm and 7 am.

In Grafana I created 2 alerts and 2 time zones, but the threshold is not paired with the time zone.

Is there another approach to achieve this setting?