A comprehensive Home Assistant blueprint that extracts the next 24 hours of temperature forecasts from any weather entity and saves them as a comma-separated string in an input_text entity.

pumpsteer_temperature_forcast.yaml

blueprint:
  name: Extract 24 Hourly Temperatures (Sorted)
  description: >
    Fetches the next 24 hours of temperature forecasts from any weather entity
    and saves them to an input_text in comma-separated format "26.8,26.6,26.8,...".
    Sorts the forecast by datetime to ensure chronological order from current time forward.
    Perfect for feeding temperature data to other automations, scripts, or dashboards.
  domain: automation
  input:
    weather_entity:
      name: Weather Entity
      description: Select the weather entity to extract hourly temperature forecasts from. Tested and verified with SMHI and Met.no weather integrations.
      selector:
        entity:
          domain: weather
    target_input_text:
      name: Target Input Text Entity
      description: The input_text entity where the comma-separated temperature string will be stored
      selector:
        entity:
          domain: input_text
      default: input_text.hourly_forecast_temperatures
    interval_pattern:
      name: Update Interval Pattern (minutes)
      description: >
        Specify a time pattern value for minutes. Examples:
        "/30" (every 30 minutes), "0,30" (at :00 and :30), "15" (at :15 every hour).
        More frequent updates ensure fresher data but may increase system load.
      default: "/30"
      selector:
        text:
          multiline: false

mode: single
max_exceeded: silent

variables:
  weather_eid: !input weather_entity
  target_entity: !input target_input_text

triggers:
  - trigger: time_pattern
    minutes: !input interval_pattern
  - trigger: homeassistant
    event: start
  - trigger: event
    event_type: event_template_reloaded

actions:
  # Fetch hourly forecast using weather.get_forecasts
  - action: weather.get_forecasts
    data:
      type: hourly
    target:
      entity_id: "{{ weather_eid }}"
    response_variable: weather_response
  
  # Debug logging for raw weather response
  - action: system_log.write
    data:
      message: "Weather forecast response: {{ weather_response }}"
      level: info
  
  - variables:
      # Extract forecast data from response (first entity)
      forecast_data: "{{ weather_response[weather_eid].forecast or [] }}"
      # Sort by datetime to ensure chronological order
      sorted_forecast: "{{ forecast_data | sort(attribute='datetime') }}"
      # Extract temperatures, round to 1 decimal, limit to 24 hours
      temps: >
        {{
          (sorted_forecast
           | selectattr('temperature', 'ne', none)
           | map(attribute='temperature')
           | map('round', 1)
           | list)[:24]
        }}
      temperature_string: "{{ temps | join(',') }}"
  
  # Debug logging to show old vs new values
  - action: system_log.write
    data:
      message: >
        Temperature update: 
        OLD: {{ states(target_entity) }}
        NEW: {{ temperature_string }}
        Forecast entries: {{ forecast_data | length }}, 
        Valid temperatures: {{ temps | length }}
      level: info
  
  # Save the temperature string to input_text entity
  - action: input_text.set_value
    target:
      entity_id: "{{ target_entity }}"
    data:
      value: "{{ temperature_string }}"