I shouldn't think it would be bad for them - unless it was raining, of course.

EDIT: I guess you might worry about yellowing from being in the sun all day, but if it's only a short time...

Water is the only real issue. They are by 0 means waterproof. But unless you want to count yellowing from sun exposure, they are fine. Yellowing takes months to happen, and required direct sun contact.

keenmaster486 wrote:

I shouldn't think it would be bad for them - unless it was raining, of course.

EDIT: I guess you might worry about yellowing from being in the sun all day, but if it's only a short time...

Yellowing could be a problem, but just keep the stuff in the shade and it will do fine.

If its a nice dry day around 60-80f and no wind you should be fine, just be sure not to let any bugs or dust get into the computers.

Your only two reall problems are the water and crud getting sucked un by the fans. A dry none windy day in a spot with out dust will be fine in . A wet windy day not so much.

as being said before, water/higher-humidity & dust.
Extra dusts may brought static that really bad for the motherboard & CPU,

Agreed with above.

There's also bugs and the added risk of stuff dropping into the grass 😜

And having stable power might also be a good idea and make sure the stuff you use to put these on is level.

And make sure to keep a swat team on standby in case of thiefs 😜

Don't forget birds. They crap on cars and I'm sure they can do the same with a computers.

Think of it this way
We see pics here of computers that have spent their lives in industrial workshops or whatever and absolutely filthy but still work fine.
Few hours in fresh air isn't going to hurt, probably lass dusty then some peoples homes!

Bird crap dropping into the top of a CRT = BAD.