Create Weather Announcement and Pool Temp on Chromecast with GTV

I have added the Jandy IAqualink integration.
I see there is a Pool Temp.

Can anyone walk me through setting this up?
I would really jus tlike to use the default Google weather announcement. For example, when I say “Hey Google, what is the weather today”, Google gives me some information. This is what i would like to use.

Is there a way to send “hey google, what is the weather today” to a specific device in HA, but then add on the pool temp announcement?

Or, is there another way for it to give me the weather and pool temp via the chromecast with GTV?

The Chromecast is hooked up to outside speakers at my pool.