The summer heat wouldn't affect it much, if at all...although the cold weather (freezing temps) may cause some brittleness (like any plastic/resin/etc...the fiber itself won't but the resin may) & you may want to be very careful opening & closing the hood...but that's only a theory

1999 Sportage 4x4...don't go there, it was free ....______o_o .../_l l__\____\ ..|--l l__----[]\|/[] .....................oo =( )_)----( )_)--)_)