Can I use In Ceiling Speakers Under Cover?

Hi,

I am wanting to add a pair of in-ceiling speakers to a Stratco gazebo roof, this area will not get wet but will be exposed to Melbourne weather. 
 

The roof itself is insulated so the speakers should remain cool in summer. I know Sonos make a outdoor speaker but I prefer the look of the in-ceiling speaker. 
 

The Sonos site does not recommend in-ceiling speakers outside but I thought because they aren’t directly in the rain & heat this still might be ok?

Thank you.