I am in desert heat and the gel suction cups do hold, damn but only if I mount on a proper adhesive disc.
Direct to the grainy dash was a no-go after a few 110 degree afternoons.
Heat wins.
In summer I push it back down once in a while and park with a sunshade so the adhesive does not soften as much.
A short arm and tighter joints help keep the wobble down when the base gets a little squishy.
