7.8 KiB

Raw Permalink Blame History

Home Assistant Jinja 2 Templates for Weather Temperatures

Step-by-step

Get the current Temperature from Home Assistant

We're casting this as a float, probably no need, but I'd rather be safe.

{% set current_temp = state_attr ('weather.home','temperature') | float %}

Get the current weather condition from Home Assistant as well

{% set current_condition = states('weather.home') %}

Fix the current Condition

When the Current weather condition is "Partly Cloudy" the default weather integration returns partlycloudy and it sounds odd when read out by a Text to Speech engine.
To fix it I added:

{% if current_condition == 'partlycloudy' %}
  {% set current_condition = 'Partly Cloudy' %}
{% endif %}

Announce the current condition and Temperature

Outside, It's {{ current_condition }} and {{ current_temp }} degrees Celsius.

Figure out the Highs and Lows from the forecast

For weather information, I want to know the High and Low temp. This data is strangely not included by default in the default weather integration, so we have to figure it out ourselves.

Start by Extracting the `forecast` array data into a variable

{% set weather = state_attr('weather.home', 'forecast') %}

Instantiate a `high_temp` and `low_temp` variable

The weather entity stores forecast data in the forecast attribute as an array of forecasts. The forecast array looks a little like this. Now it's only in this writeup that I've made the realisation that I got some fundamental concepts in my video wrong. Each item in the "forecast" array is actually for a "Day" not an hour..... OOPS!.

forecast: 
- condition: partlycloudy
  datetime: '2023-06-05T02:00:00+00:00'
  wind_bearing: 118.2
  temperature: 17.7
  templow: 8.5
  wind_speed: 18.4
  precipitation: 2.7
- condition: partlycloudy
  datetime: '2023-06-06T02:00:00+00:00'
  wind_bearing: 14.2
  temperature: 17.8
  templow: 11.8
  wind_speed: 21.2
  precipitation: 0.1
- condition: rainy
  datetime: '2023-06-07T02:00:00+00:00'
  wind_bearing: 20.6
  temperature: 17.3
  templow: 12.7
  wind_speed: 18.7
  precipitation: 23.9
- condition: partlycloudy
  datetime: '2023-06-08T02:00:00+00:00'
  wind_bearing: 277.1
  temperature: 14.6
  templow: 10.3
  wind_speed: 15.8
  precipitation: 0.6
- condition: partlycloudy
  datetime: '2023-06-09T02:00:00+00:00'
  wind_bearing: 281.9
  temperature: 13.8
  templow: 10.4
  wind_speed: 20.2
  precipitation: 0.4

{% set high_temp = weather[0].temperature %}
{% set low_temp = weather[0].templow %}

Some Qualitative statements about the `high_temp`

This code block looks at the high_temp variable and runs the if statement below to make a qualitative statement about it. These have been built for °C and I pulled the qualitative statements out of my head. Change them as you need to

Above 30°C say "It's going to be a hot one tomorrow"
between 20°C and 30°C say "It should be a warm day tomorrow"
between 15°C and 20°C say "It's going to be a pretty mild temperature tomorrow"
between 10°C and 15°C say "It seems like it'll be a bit chilly tomorrow"
between 0°C and 10°C say "It's going to be a cold day tomorrow"
< 0°C say "It's going to be freezing tomorrow"

{% if high_temp > 30 %}
  It's going to be a hot one tomorrow
{% elif 20 < high_temp < 30 %}
  It should be a warm day tomorrow
{% elif 15 < high_temp < 20 %}
  It's going to be a pretty mild temperature tomorrow
{% elif 10 < high_temp < 15 %}
  It seems like it'll be a bit chilly tomorrow
{% elif 0 < high_temp < 10 %}
  It's going to be a cold day tomorrow
{% else %}
  It's going to be freezing tomorrow
{% endif %}

Announce the `high_temp` and `low_temp` values

Again, built for °C

The forecast high for tomorrow is {{ high_temp }} °C.
{{ forecast_condition }} With a Low of {{ low_temp }} °C .

Some qualitative statements about the `low_temp`

Again we're looking at °C and the statements and ranges are arbitrary, and can be adjusted to your tastes

Remember these are for the low_temp variable, so it's not going to get colder than these

Above 30°C say "Wow. That's hot!"
between 20°C and 30°C say "it's not going to get below 20°C tomorrow"
between 10°C and 20°C say "it might get a little bit chilly tomorrow."
between 0°C and 10°C say "That's cold."
< 0°C say "Absolutely freezing!"

Puntuation like ., !, ? and , is important in the text to speech statments so the timing sounds "natural"

{% if low_temp > 30 %}
  Wow. That's hot!
{% elif 20 < low_temp < 30 %}
  it's not going to go below 20°C tomorrow.
{% elif 10 < low_temp < 20 %}
  it might get a little bit chilly tomorrow.
{% elif 0 < low_temp < 10 %}
  That's cold.
{% else %}
  Absolutely freezing!
{% endif %}

Now we can put it all together:

{% set current_temp = state_attr ('weather.home','temperature') | float %}
{% set current_condition = states('weather.home') %}

{% if current_condition == 'partlycloudy' %}
  {% set current_condition = 'Partly Cloudy' %}
{% endif %}

Outside, It's {{ current_condition }} and {{ current_temp }} degrees Celsius.

{% set weather = state_attr('weather.home', 'forecast') %}
{% set high_temp = weather[0].temperature %}
{% set low_temp = weather[0].templow %}

{% set forecast_condition = weather[0].condition %}

{% if high_temp > 30 %}
  It's going to be a hot one tomorrow
{% elif 20 < high_temp < 30 %}
  It should be a warm day tomorrow
{% elif 15 < high_temp < 20 %}
  It's going to be a pretty mild temperature tomorrow
{% elif 10 < high_temp < 15 %}
  It seems like it'll be a bit chilly tomorrow
{% elif 0 < high_temp < 10 %}
  It's going to be a cold day tomorrow
{% else %}
  It's going to be freezing tomorrow
{% endif %}

The forecast high for tomorrow is {{ high_temp }} °C.
{{ forecast_condition }} With a Low of {{ low_temp }} °C .


{% if low_temp > 30 %}
  Wow. That's hot!
{% elif 20 < low_temp < 30 %}
  Pretty warm
{% elif 10 < low_temp < 20 %}
  it might get a little bit chilly.
{% elif 0 < low_temp < 10 %}
  That's cold.
{% else %}
  Absolutely freezing!
{% endif %}

Put it in a Script

alias: Announce Weather Details
  sequence:
  - service: notify.alexa_media
    data:
      message: >_
      {% set current_temp = state_attr ('weather.home','temperature') | float %}
      {% set current_condition = states('weather.home') %}

      {% if current_condition == 'partlycloudy' %}
        {% set current_condition = 'Partly Cloudy' %}
      {% endif %}

      Outside, It's {{ current_condition }} and {{ current_temp }} degrees Celsius.

      {% set weather = state_attr('weather.home', 'forecast') %}
      {% set high_temp = weather[0].temperature %}
      {% set low_temp = weather[0].templow %}

      {% set forecast_condition = weather[0].condition %}

      {% if high_temp > 30 %}
        It's going to be a hot one tomorrow
      {% elif 20 < high_temp < 30 %}
        It should be a warm day tomorrow
      {% elif 15 < high_temp < 20 %}
        It's going to be a pretty mild temperature tomorrow
      {% elif 10 < high_temp < 15 %}
        It seems like it'll be a bit chilly tomorrow
      {% elif 0 < high_temp < 10 %}
        It's going to be a cold day tomorrow
      {% else %}
        It's going to be freezing tomorrow
      {% endif %}

      The forecast high for tomorrow is {{ high_temp }} °C.
      {{ forecast_condition }} With a Low of {{ low_temp }} °C .


      {% if low_temp > 30 %}
        Wow. That's hot!
      {% elif 20 < low_temp < 30 %}
        Pretty warm
      {% elif 10 < low_temp < 20 %}
        it might get a little bit chilly.
      {% elif 0 < low_temp < 10 %}
        That's cold.
      {% else %}
        Absolutely freezing!
      {% endif %}

    - media_player.dining_room_echo_plus
  mode: single

7.8 KiB Raw Permalink Blame History