can you wear this coat on cold days?
The jacket has no lining and the fabric itself is quite thin. It really is only suitable for warm weather rain. If you order large enough, you could wear a warm layer of something else underneath -- but this jacket alone will not do the trick.
Yes but it's not insulated so wouldn't provide warmth just rain protection. I wear a fleece underneath sometimes which suffices in a temperate climate like Seattle.
I haven't tried it on a cold day, just in the mid-50's F. It isn't lined. But it is wind-proof and with a cozy sweater as an inner layer it was very warm and comfortable.