Columbiagirls Katelyn Crest Jacket (pack of 1)

We live in a state where it gets brutally cold. Would this keep my daughter warm?

Is there a temperature rating on this? When people say it kept their kids warm, how cold was it outside?

I'm looking for a 2t. under "little" it only has xxs through l, but doesn't specify measurements. can you tell me what size i'd get for 2t? thanks!

How is this with weather that gets down to -30 windchill?