In Colorado Springs is almost perfect. It seldom goes below 0F and rarely breaks 100F, with winter mornings usually 15F and summer afternoons in the 90sF. I've lived and biked here since I was 30, I am now 63 and still bike to work year round with studded snow tires in the winter.

In my early 50s I pushed my cold weather limit down to 5F, although it almost never gets that cold. As I approached 60 I found I can more easily handle cold weather. But I also found I am less tolerant to heat. This seems to be opposite most seniors.

It's very dry here so in the summer so wearing modern moisture-wicking fabrics really helps me keep my cool. I wear slightly loose t-shirts with sun sleeves. Having the air blow up the loose short sleeves into my arm-pits chest and back really helps. I'm not racing or trying to set low elapsed times, so a little less aero in exchange for comfort is good. I also will wear a light wicking headcap under my helmet which also helps. And at 6500 feet in altitude covering up from the harsh sun is essential.

However, in the last few years I have not ridden on a few occasions because of the heat, now that it seems to affect me more. 48F to 62F with high overcast seems to be my happy place. And I yearn for it on colder and warmer days...except for snow.

I will endure cold temps to ride to work in the snow to show off to my much younger co-workers.