In 1787, French physicist Jacques Alexandre Cesar Charles concluded if the pressure of a gas remains constant, the volume of the gas will increase as the temperature increases and conversely the volume will decrease as temperatures decrease. In other words V1/T1 = V2/T2…or in other words swings in temperatures can play havoc with your tire pressure. The volume of air will expand or contract as temperatures rise and fall. For every 10-degree change in temperatures, the tire pressure will change +/- 1-2 psi.
For safety’s sake, check your tire pressure as the temperatures fluctuate.