Yes, the same thing did happen to me - after the weather suddenly turned cooler. I just topped off each tire with a few pounds of air - even though they all read correctly - and it "fixed" the problem. I sometimes question the accuracy of the guages we use. I have 3 or 4 and they all differ by a pound or 2. My most accurate seems to be the one I bought for our travel trailer. It's got a higher pressure reading. My other ones are only good for 50 pounds and this one can read up to 80.