Whatever the weather is, I commute in it. What I want to know is, if it's hot and dry 8AM, do I still need to take up half a pannier with rain gear, plastic wrap my work clothes and tablet just in case a pannier leaks, etc. for the homeward commute? If it's misty at 8, is it likely to be pouring before 8:30 when I get to work? If it just finished raining at 8, should I suffer the heat of the rain gear because another microcell is ten minutes behind that one, or just the shoe covers so I don't have wet socks after the first puddle?