1. Between October 15th and March 15th I don't commute by bike at all.
2. From March 15th to October 15th I commute Monday, Wednesday and Friday. And I only do those three commutes if there is a less than 40% chance of rain.
I also won't commute if the temp is expected to be below 32. I go down from a bit of elevation to the river for a lot of my commute and it's always a few degrees colder down by the water.
I typically do hard interval rides on Tuesday and Thursday and then longer club or solo rides on Saturday or Sunday. I'm more of a part-time commuter.