Yes and no. im a huge fan of AirPods , so it really seems pointless to have wireless headphones if I need to get my phone out to see the weather information, effectively you are just better off looking at the forecast. That's my personal experience .
"What's today's weather " across Siri , echo And google - I just tried it , Siri one is pointless for an AI, you are just better off opening the weather app. The other two give me a hands free summary , which is the point of a AI assistant?
I see that you found the way of getting the temperature , yes you have to specifically ask for it. Like i said it's personal, and with Siri I have to ask a lot of different ways to get the answer, quicker to type it into the browser.