Cargo aircraft temperature What is the temperature in the storage compartment on board of a cargo aircraft? I'm ordering a temperature-sensitive package by airmail and wouldn't want it to freeze.
There are many questions related to temperature of the luggage compartment on a passenger airplane but I didn't find anything about cargo-only aircrats.
Many things including bottles containing liquids break when the temperature drops below zero, so the cargo hold is always maintained above freezing; 7&deg;C is typical (source).  This applies to both pure cargo aircraft and mixed passenger/cargo airplanes.

That said, it's harder to control for (say) cargo sitting around on tarmac while waiting to be loaded on the plane.  Your cargo shipper can likely arrange temperature-controlled shipping for you, but at a steep extra cost, and this is usually meant for perishables where the main danger is heat, not cold.  But unless you're shipping something to/from Siberia, you'll likely be fine.