Originally Posted by RonH
Between SAD and cool/cold temps my motivation to bike commute is in the toilet.
I get up every morning and get everything ready to go. I open the door to check the air temperature (to determine how many layers I'll need, etc.) and I quickly close the door and tell myself I'll ride tomorrow when it's warmer.
Please help me get out of this rut.

You can get tatoos, but a little cold air is too much?
I have SAD too. But it's never affected my ability to climb on my old commuter bike. I know that I have responsibilities no matter what B.S. my mind is dishing out.
The way it is now, you are defeated before you touch the doorknob. You are asking the wrong question. You check the air with the question of whether to commute. Your only question should be how should I dress to commute.
I would also recommend meditation. You need to detach yourself from identification with the emotional content of your thoughts. You are bulls**ting yourself. Check out Sakyong Mipham's
Ruling Your World.
The only thing that is absolutely guaranteed to get you on the bike is sell your car! No better motivator than absolute necessity. Good luck.