Only ridded in low-mid 30's so far, but after a few minute warm-up she's good to go. No sputtering, pausing, hiccup, etc...that's the beauty of EFI. Now, my 05 XL1200 Sporty (carb) was a different animal. Pretty cold blooded for the 1st few miles, even after warm-up, and a few "hesitations" along the way when riding. I didn't have a tuner (Stage-1 & pipes) which would've helped a bit to fine tune these out. Overall - very pleased w/the 09 FLHX in hot & cold weather riding.