Would this jacket be able to keep me warm in temps such as -30 or even colder; or would I have to wear another layer when I am out in the cold winter months. Seeing how I live up in Canada this is one of my questions that I have about this jacket.

I don't think anything short of an insulated full body suit's gonna keep you warm at -30. You're talking Fahrenheit right? I hang out at the bus stop in this jacket at 5-10F and the jacket keeps me relatively warm. read relatively. any exposed skin is still colder than a republican. It's strenght is it's versatility. Rain jacket, 30F plus liner, or together a very warm above zero jacket. Order it and try it out. If it's too weak return it, you're out $20.
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