I get that. However, I interpreted curlypearl's OP as not complaining about that specific instance, per se, but as using it as an example of the tendency of random men on the street to think it's appropriate to make remarks about a woman's appearance. I saw it as a comment on the broader issue. Could she have used a more clear example? Sure. But this particular event bothered her as much and in the same way as the many others she's had to endure, and since it was a recent occurrence, she chose it. Whether he meant it to be snarky or not is beside the point. It made her uncomfortable, it insulted her, it felt like one more objectification to her, in a likely long list of objectifications. And I agree. There are plenty of ways to talk about the weather without bringing someone's choice of clothing into it. Again, I can't see a man making the same comment to another man.
Women's appearances have been up for judgment for so long that we almost don't notice anymore unless someone is being blatantly disrespectful. But it's unnecessary and sexist even if it is a compliment.