Bump the pressure at least 3 pounds above what is recommended on the door sticker, at least.
My wife's 09 does the same thing if it is 2 lbs lower than the TPMS thinks it should be. Discount Tire even used their tpms tester to make sure they didn't need to be recalibrated. Her light will come on if the tire is 1lb below ideal. Running 3-4psi above what the door sticker says and the light will stay off for months at a time now. Just put air in her tires last night now that snow is here again.