It might be cold in Kansas City, but Gracie Hunt is on fire ... 'cause the Chiefs heiress showed support for her beloved team by sporting a bikini in the snow ahead of their big playoff game!!
Gracie -- daughter of K.C. Chiefs chairman and CEO Clark Hunt -- shared the steamy pics on Friday via Instagram ... a day before Kansas City faces the Jacksonville Jaguars in the Divisional Round at Arrowhead Stadium.
The 23-year-old was clearly enjoyin' the snow with her Chiefs-themed bathing suit on ... and considering the temps, she threw on some moon boots and a metallic jacket so she didn't freeze to death.