HA - Max Temp trigger-based template sensor

max_temp_tr_sen.yaml

# Option 1:
template:
  - trigger:
      - platform: state
        entity_id: sensor.temp
        not_to:
          - unavailable
          - unknown
      - platform: time
        at: "00:00:00"
    sensor:
      - name: Temperature Daily Max
        unit_of_measurement: "°F"
        state: >
          {% set current = this.state | float(0) %}
          {% set source = states('sensor.temp') | float(0) %}
          {% if trigger.platform == 'time' %}
            {{ source }}
          {% else %}
            {{ [source, current] | max }}
          {% endif %}

# Option 2: possibly less accurate, but fewer triggers
template:
  - trigger:
      - platform: time_pattern
        minutes: "/5"
    sensor:
      - name: Temperature Daily 5m Max
        unit_of_measurement: "°F"
        state: >
          {% set current = this.state | float(0) %}
          {% set source = states('sensor.temp') | float(0) %}
          {% if ((now().hour == 0) and (now().minute < 5)) %}
            {{ source }}
          {% else %}
            {{ [source, current] | max }}
          {% endif %}