Avoid n/a values for current day min/max temperatures?

[nickdos]

The current day forecast (rest of the day, I suppose) is showing both min and max temperatures as n/a, which looks a bit broken on the friendly card. See:

Ideally, the values forecasted for the current day should remain but I'm guessing BOM is not sending them through in the feed.

I tried using template expressions (to try to check for n/a and then output nothing) but they came out as literal characters.

Any suggestions for avoiding the n/a values?

[nickdos]

Answering my own question. I worked out a template sensor can do this:

sensor:
  - platform: template
    sensors:
      bom_current_day_forecast:
         value_template: '{{ states.sensor.bom_forecast_canberra_0.attributes.Summary }}'  
         friendly_name: 'Today' 
         icon_template: '{{ states.sensor.bom_forecast_canberra_0.attributes.icon }}'

I tried using a template for the friendly_name but it came out as {{states.sensor.bom_forecast_canberra_0.attributes.friendly_name }}, so went with today instead.

Update: I've made it a bit smarter so, depending on the time of day, the output temp is the min-max range, just max or overnight min.

bom_forecast_current_day:
  value_template: >-
    {% if state_attr('sensor.bom_forecast_canberra_0','Min Temp C')  %}
      {{ state_attr('sensor.bom_forecast_canberra_0','Min Temp C') }}°–{{ state_attr('sensor.bom_forecast_canberra_0','Max Temp C') }}°
    {% elif state_attr('sensor.bom_forecast_canberra_0','Max Temp C')  %}
      Max: {{ state_attr('sensor.bom_forecast_canberra_0','Max Temp C') }}°
    {% elif state_attr('sensor.bom_forecast_canberra_1','Min Temp C') %}
      Overnight min: {{ state_attr('sensor.bom_forecast_canberra_1','Min Temp C') }}°
    {% endif %}
    {{ state_attr('sensor.bom_forecast_canberra_0','Summary') }}
  friendly_name: 'Rest of the day' 
  icon_template: '{{ states.sensor.bom_forecast_canberra_0.attributes.icon }}'