The news about cold environments is certainly interesting, perhaps I should leave my tinned goods out in the sunshine when the weather is nice rather than putting them in the cooler garage.
I wouldn't leave tins out in sunshine.
Although it might help dry them out quicker, the safe storage of food in tins depends on them remaining 100% sealed.
Because you can't control how hot the tin might get in the sunshine there is a risk of the contents heating up and expanding to the point where the pressure 'bursts' the seal.
This won't necessarily be an explosive (and messy
) burst - it could be invisible, but enough to compromise the safety of the food within.
A cool - but well ventilated - garage shouldn't be a problem. Remember that clothes will dry on a line outside when it is quite cold, so long as there is enough ventilation (wind).
If the ventilation is poor and you sometimes get condensation then it is the wrong environment to store tins in any circumstances - as you risk them going rusty and the contents becoming unsafe.
The whole purpose of tinning is to keep food fresh and safe for a long period of time (if the tin is kept in the right conditions) which is far longer than anyone suggests Coronavirus can survive for at normal ambient temperatures.
So if you are concerned then use that long period of time to minimise the risk from something on the
outside of the tin, rather than rush the process (e.g. by putting the tins in hot sunshine) and risk compromising the safety of what is
inside the tin.