The perfect temperature to store chalk paint is 55-85 degrees. Storing chalk paint at temperatures that are too warm or too cold can alter the consistency and properties, and thus make it unfit for usage.  You’re almost always sure to have leftover chalk paint because of how effective it is in just a few coats, leaving plenty for later. Make sure to store your paint in cool and dry places, away from the sunlight, and from moisture.  The best way to store your chalk paint is after cleaning out the lid to ensure a tight seal so that the can remains airtight.