Denver Prep

I have been checking the weather for Denver as I will be going there soon. I am pretty alarmed to find the weather fluctuates quite a bit and I mean QUITE a bit. One day it could be sunny with a high of 17C and a low of 6C and the next day could be windy with a high of 7C and a low of 1C. There is the occasional snow showers as well! :( I hate the cold. :( Looks like I will have to bring winter clothing for my Denver trip.