My 2005 Rocket struggled to start in weather under 40 degrees. My 14 rocket also struggled to start under 40 but always did but seemed very pissed about it. My 2020 Rocket started in 45 degree weather but chugged a little harder and I thought , "Here we go again" but it started. If it gets (and rarely does here but early it's cold)) in the 30's I believe it will struggle. I think it's the nature of the BEAST. I don't know how you cold weather guys do it.