2024.4: Organize all the things!

This might be helpful. It shows how to create a Trigger-based Template Sensor to periodically get the daily weather forecast and store it in an attribute named forecast. Then you simply point forecast_daily_template to that Template Sensor’s forecast attribute.

The example also shows how to round the weather values but that’s completely optional. If you don’t need rounding, there’s a simpler version of the Trigger-based Template Sensor shown here.