rck, congratulations on the new low! You're a tough guy to ride in those temps.

I looked back through my bike books, 3 x 5 spiral notebooks, and the lowest starting temperature for a ride I have recorded was 17.6 F ambient with a 5 F windchill. When it gets that low, I look and feel like the Michelin Man. It's hard to pedal against all those layers, and as another has noted, it's hard to stay out for more than an hour.

I'll take the heat and humidity over having to ride all bundled up.