OpenWeatherMap precipitation probability

Share your Projects!
1

1000122387
10001223871080×1296 158 KB

After a lot of trial and error, I finally figured out how to pull precipitation_probability from OpenWeatherMap, so I thought I’d share. This is the sensor I added to my configuration.yaml to get it to work after adding the OpenWeatherMap. It checks every 15 minutes, but you can adjust that.

template:
  - trigger:
      # Trigger every 15 minutes
      - platform: time_pattern
        minutes: "/15"
      # Trigger on Home Assistant start for an immediate value
      - platform: homeassistant
        event: start
    action:
      # Call the weather service and store the response in a variable
      - service: weather.get_forecasts
        data:
          type: hourly
        target:
          entity_id: weather.openweathermap
        response_variable: hourly_forecast_data
    sensor:
      - name: "OpenWeatherMap Rain Probability Next Hour"
        unique_id: openweathermap_rain_probability_next_hour
        unit_of_measurement: "%"
        state_class: measurement
        icon: mdi:weather-pouring
        # This state template calculates the rain probability
        state: >
          {% set forecast = hourly_forecast_data['weather.openweathermap'].forecast %}
          {% if forecast is not none and forecast | length > 1 %}
            {{ (forecast[1].precipitation_probability) | round(0) }}
          {% else %}
            unavailable
          {% endif %}
        # These attributes will be added to your sensor
        attributes:
          # This timestamp will update every 15 minutes, proving the sensor is working.
          last_fetch: "{{ now().isoformat() }}"
5 Likes
2

I was thinking the same. Creating a sensor that will tell me if it will rain soon. So this sensor fetch precipitation_probability 1 hour from now and update every 15 minutes?

After posting this, I read your sensor name and it did say next hour. oops.

3

@imadethem do you also get the error message on the “time_pattern” line?

image
image1265×116 12.5 KB

(it does work, however. just that configuration.yaml is in red)

4

No error in my configuration.yaml file using that time_pattern line, odd. I am using home assistant green, and I’m fairly new to HA in general, so I’m not sure if the system could be causing differences

5

If you copy and paste the code, delete it and type it manually. I find that HA somethings throws error even it the code looks correct.