I've been commuting by bike off and on for about 20 years now and have spent nearly my entire life in coastal Southern California. My wife got the chance at her dream job which means we are moving to Broomfield, Colorado (between Boulder and Denver) in a little over a week. My plan is to get a job within 5 miles of where we are going to live and commute by bike...but I've never been to Colorado so I have no idea on what to expect or how to prepare for bike commuting there.

Are there any tips and/or advice that can be offered?

Are my cyclocross-ish Cross Check and Steamroller bikes adequate for commuting year round in that area? Should I be looking at a bike with disc brakes?