Paint activator temp range

Last fall I bought some urethane primer with mid-range activator thinking by the time I got to spraying temps would be in the 70's here in Florida.
As happens, life gets in the way and I'm just now about ready to spray, temps are now in the 90's.
Will there be an issue using the mid-range 70-80* activator or should I just bite the bullet and got the high temp activator?