I agree with Gina. Pack abit of everything and watch the forecasts just before you leave. We've been a few times at this time of year and Jan and we hit a few hot days (80s) and other days we had to wear spring jackets. Its relative to what you are used to as well. Its often -30 to -40 here so theres no way I'll need a hat and gloves if its +30, lol. It will feel warm to me. Layers are best. I like windsuits, wear T-shorts and shorts under them and just strip as the day goes on.