Solar noon

The Solar noon trigger fires when the sun reaches its highest point in the sky for the day. This is the astronomical midpoint between sunrise and sunset, and it rarely lands exactly at 12:00 on the clock. Home Assistant calculates the exact time from your home location.

Use it to act when the sun is at its strongest: close blinds against the midday glare, run the most demanding loads while solar production peaks, or check in on a south-facing room.

Using this trigger from the user interface

If you prefer building automations visually, Home Assistant walks you through this trigger step by step. You pick what to watch, tweak a few options, and save. No YAML knowledge required.

To use this trigger in an automation:

1. Go to Settings > Automations & scenes.
2. Open an existing automation, or select Create automation > Create new automation.
3. In the When section, select Add trigger.
4. From the search box, search for and select Sun: Solar noon.
5. Select Save.

Using this trigger in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, refer to this trigger as sun.solar_noon. It has no options:

trigger: sun.solar_noon

This fires every day, the moment the sun reaches its highest point.

Good to know

• This trigger does not use a target. It applies to the sun at your configured home location.
• Solar noon is the moment the sun crosses the meridian, not 12:00 on the clock. The clock time drifts through the year and depends on your longitude within your time zone.
• To act on the opposite moment, when the sun is at its lowest, use Solar midnight.

Try it yourself

Ready to test this? Go to Settings > Automations & scenes, create a new automation, and add this trigger. Save the automation, then change the state of the targeted entity to watch the trigger fire on your actual entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more].

For this trigger, there is no target entity to change. To test it, wait for the next solar noon, or temporarily switch to a trigger you can control while you build the rest of the automation.

More examples

Real scenarios where this trigger fires in automations and scripts. Copy any example and adapt it to your setup.

Automation: close the blinds against the midday sun

When the sun reaches its highest point, close the south-facing blinds to keep the room cool.

• Trigger: Solar noon
• Action: Close cover
  • Target: Living room blinds

alias: "Close blinds at solar noon"
triggers:
  - trigger: sun.solar_noon
actions:
  - action: cover.close_cover
    target:
      entity_id: cover.living_room_blinds

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the trigger you’re using and what you expected to happen, or share on our subreddit /r/homeassistant.

Related triggers

These triggers work well alongside this one:

• Solar midnight: Triggers when the sun reaches its lowest point.

• Sunrise: Triggers when the sun rises.

• Sun elevation changed: Triggers whenever the sun’s elevation changes, optionally limited to a threshold or range you set.