Good question. I ride much less when it's warm. Here in NY you're going to be in traffic at some point and you don't get the benefit of the wind, just the negative effect of a hot engine.
Personally I don't like this time of the year because I do ride less and it feels naked to be riding without gear and there are other bikes everywhere. There's something nice about the winter when I'm the only one around riding.
I do own mesh stuff but it's hot in the city, too.
1993 R100GS PD
1986 R80 G/S PD