> And winter is the time when tire pressure fluctuates the most
genuinely curious, why? I thought tire pressure fluctuations were linearly related to air temperature fluctuations. does the temperature vary more in the winter than in the summer?
At least in some of the US, quite a bit more. Winter might be swings of >50F, especially night to day, while summer variation is likely to be <40F. I'm not what all weather patterns factor into that, but a major part is that winter air is dryer, and water vapor does a lot to 'buffer' brief temperature changes.
That said, I mostly end up checking my tires more in the winter because I care more; if a tire is only a few pounds low I'd still prefer to handle it before I have to go drive on snow during a cold snap.
genuinely curious, why? I thought tire pressure fluctuations were linearly related to air temperature fluctuations. does the temperature vary more in the winter than in the summer?