Combine attributes from multiple sensors to a weather forecast sensor

Configuration
1

Since 2021.3 introducing Template Weather Provider, i want to make a custom weather card base on my local weather station’s api

Below is the weather forecast attribute from openweathermap

forecast: 
- datetime: '2021-03-10T04:00:00+00:00'
  condition: cloudy
  temperature: 21
  templow: 19.4
- datetime: '2021-03-11T04:00:00+00:00'
  condition: partlycloudy
  temperature: 22.7
  templow: 18.7

i can’t figure out how to replicate the weather forecast format (multiple array) by using attribute_templates

thanks

2

Any help? thanks

3

The forecast atttribute contains a list. Each item in the list contains one day’s worth of weather data.

Paste this into the Template Editor and change the name of the entity to match your openweathermap entity:

{{ state_attr('weather.openweathermap', 'forecast')[0].temperature }}

It will report the value of temperature from the first (zeroth) item in the forecast list.

4

I believe the question is the other way around.
Have values but how to create the same output (list as attributes).

5

If the question is the other way around then the OP should create a template that generates a list in the format required by forecast.

Challenging to provide more guidance until more information is provided.

6

You are right, a couple of values from local weather api to rest sensor but in difficult to create the attribute of weather forecast

7

I have a list of rest sensors, e.g.
sensor.forecast_0_date
sensor.forecast_1_date
sensor.forecast_0_temp
sensor.forecast_1_temp
sensor.forecast_0_condition
sensor.forecast_1_condition
but i cant figure out how to use attribute_template to make a whole new weather forecast sensor to match the format as the first post