Yeah, you can plan on cold weather, possibly very cold weather. Sometimes sub-zero(F)! Snow is another possibility. It's very hit or miss weather in this region. 3 years ago we were sleeping with our windows open in January. But plan for the cold weather at minimum. Waterproof and warm boots would be advised.
...i may need to gear up with the heavy clothing for this trip.
Can you buy "winter clothes" in S California ? I wouldn't anyway unless you'll be outside a fair amount. If your exposure to the outside is walking from the hotel to your car (or bus) and then from that to the GE facility, there's hardly any need. I never wear a "winter" coat unless I'm playing or working outside and even then, it's not too practical (you can still sweat).
By the way, try and arrange for transportation vs renting a car just in case there's snow or ice. Presuming the training is at the GE facility in Evendale, that's a high-traffic area, by Ohio standards, and having never driven in it wouldn't be something worth trying.
Do not listen to the people above and heed my warning!
Ohio becomes a frozen tundra in January and outsiders do not fare well. Many are found dead in frozen corn fields, gnawing on stalks in their final hour. Turn back now!
Good office wear here in the winter is a t-shirt, button up shirt, sweater and jacket (not a giant parka). Layers keep you warm outside, and if its too warm inside, take off sweater and you're set. Pants, nothing too thin. Shoes, warm and waterproof.
But yea, January weather around here can go either way. It could be mild, could be a mix of rain/freezing rain, could be a foot of snow...or all 3 in 1 day. Or the worst, clear sunny skies with freezing arctic air ripping through from Canada. A hi of 10f can feel warm on those days.
I work for GE Money about 60 miles north. Yes, it does snow in Jan in Ohio. Could be 1 in or could be 12 in. In Cincinnati it might be 70 degrees! Be prepare for any season. If you don't like our weather, wait 12 hours, it will change.
It may snow. But it may also rain. It may climb into the 60s or be below zero. One thing about Ohio, if you don't like the weather, just wait a little bit and it'll change
The average weather graphs in the link below may be helpful - weather stuff is about 1/3 of the way down the very long page. »www.city-data.com/city/Cincinnati-Ohio.html -- The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well-meaning but without understanding. -- Justice Louis D. Brandeis