In summary, a rechargeable electric air horn, like the WoodsCan Hornet air horn, performs best in a broad range of temperatures (hot and cold) versus aerosol canister air horns. Here’s why:
In cold weather, gas air horns lose pressure so they sound weaker, don’t last as long, can freeze up, and may not work at all. Rechargeable electric (compressor) air horns will not lose sound volume when used in cold temperatures however the battery run time can diminish in extreme cold.
In hot weather, gas air horns run the risk of over-pressurizing causing them to leak or rupture, both of which are performance and safety issues.
Rechargeable electric air horns, like the Hornet air horn, will work reliably at high temperatures and there are no safety issues, though the batteries may lose some of their charge causing the run time to be shortened.