The Stealth is not effected by cold weather as it has a multi viscosity hydraulic fluid in one chamber and a granular mix in the other, in other words you can not freeze it,at least not at temps that living warm blooded animals are still around.
I hunt in some pretty cold weather myself and have tested the Stealth in below zero weather,in fact I took my 3rd P&Y whitetail this year and it was -5 degrees with the windchill that morning! The Stealth did its job, as my bow just went " thump" ! Now,if I could just figure out how to keep my toes warm,brrrrr!
You can check out some of the animals taken by hunters using Stealth equipment on my website!
www.stealtharchery.com