We've been able to ask Google Assistant for information about the local weather for a long time, and your Chromecast's home screen has shown the current temperature along with a weather icon. If you wanted to check out your upcoming weather, the only option was to "OK Google" yourself a forecast while you sit and listen through it. Back at I/O, Google announced upcoming contextual visual responses for the Google Home/Assistant and Chromecast, and now at least one of the features they showed off here. You can now ask your Google Home to show you the weather on your Chromecast.
To trigger the new feature, all you need to do is ask Google to show you the weather on your Chromecast, or whatever you may have named the device. (For example "Ok Google, show me the weather on my TV"). After a bit of a delay, an overlay card like that above will appear on top of whatever content is currently on your Chromecast while your Google Home reads the weather, as it did before. So if you're in the middle of a day-long Altered Carbon binge, you can check and see that the world still follows the cycles of weather without interrupting your show.
The overlay shows the current weather in more detail, with expected high and low temperatures, precipitation, humidity, and a further five-day forecast.
Not all Assistants are weather-equals
Based on reports from Reddit , this feature isn't live in all countries just yet, so YMMV. It also doesn't work with the Google Assistant on phones. Like many other features, this appears to be exclusive to dedicated Assistant-powered hardware like the Google Home lineup.