I'll want arm warmers for sure, or possibly even a jacket; maybe leg warmers as well. It's expected to be overcast, and I hope it doesn't rain. That would be a bit too much. My rain cape is useless when it's windy, and/or I'm riding at a pace faster than 6 mph. It flaps around like crazy and I get almost as wet as I would if I didn't have it.
We do need rain, however; it's been dry for several weeks. Let it rain before 3 am tomorrow, or after I get to work tomorrow. And tomorrow night it's supposed to get even cooler than tonight. Fall is finally coming.