Check your tire pressure

[Don M.]

For those who still drive, this is a good time of year to check your tire pressure as colder weather arrives. The cold weather causes the tire pressure to drop, which can cause excessive tire wear, and even "handling" issues if the pressure is substantially low. It is quite cold here today, and we were at the stores with the car sitting outdoors for a couple of hours. When we started to go back home the dashboard monitor showed low pressure on the tires....25/26 PSI. So, when we got home, I boosted the pressure back up to 30psi. If you don't have a compressor, nearly all gas stations/convenience stores have a tire hose at the pumps, and a couple minutes of checking/adjusting the pressure can be a good idea.
The reverse is true when Summer arrives....you can release a bit of air to keep the tires from being "over inflated".

 

[Nathan]

Both my truck and DW's car have the low tire pressure indicator, had to add air to the left front tire recently.

 

[Capt Lightning]

For a constant volume, the pressure in a vessel (a tyre in this case) is proportional to the temperature in Kelvin. (Gay-Lussac's law )
A change in temp from say 70 F to 40 F ( 294.2 K to 277.6 K ) will only cause a small change in tyre pressure and this is quite normal.

Of course, this doesn't mean that that you shouldn't check tyre pressures regularly.

 

[911]

Both my truck and DW's car have the low tire pressure indicator, had to add air to the left front tire recently.

We have those monitors also. I just replaced the 2 front ones on my wife’s vehicle. They aren’t cheap.

 

[Harry Le Hermit]

We have those monitors also. I just replaced the 2 front ones on my wife’s vehicle. They aren’t cheap.

They've been required in the U.S., by law - circa 2007 (most companies began 2~3 years earlier), as a result of the Firestone/Ford underinflated, overheated, tire blowout and rollover fiasco a few years earlier.
And yes... they are expensive to replace, but what isn't?