You're comparing wrong arguments.
Open carrying is harder and more inconvenient while its cold. Conceal carrying is harder and more inconvenient while its hot. Those are the arguments.
If you find it suspicious for the open carrier when its cold, because its inconvenient, do you feel that way when its hot and you spot a concealed carrier?
This is what bikenut, I believe, was referring to.
Ah, I see. No, I don't find it suspicious, in either case, I just think it's foolish. I think people who go out of their way to open carry, even when it might be detrimental to their health, like wearing a light jacket they can pull behind their gun when it's freezing out, have poor judgement. People who conceal no matter what the weather is a different story. In some states, like FL and TX, they really have no choice. I'd hate to have to conceal a Glock when it's 90 degrees at 90% humidity, or 110 degrees and baking outside. But I think, if you have the option, open carry is the better choice for warm weather.
I conceal when it's cold, period. I don't carry for political reasons, or to be an activist, or to educate the public. I could care less about the public. I carry a gun for self defense. That's why I choose to open carry.