It doesn’t get much more obvious than this.
If the dress doesn’t give it away (it’s about as transparent as one can get) then the lack of bra straps or “restraint” from her chest should help you figure it out. Not to be “that guy” but she should really try more subtle movements. It’s like sneaking a peek but without even trying. Maybe she’s just doing the weather, but in all likelihood their show is getting a substantial ratings boost just from her wardrobe choices.
If more people continue tuning in, there may just be a day where she does the weather in nothing but high heels. And that just makes me wish my name was Weather.