If I had to guess, you have a pressure reduction valve (PRV) and may not have an expansion tank. Or, if you do, it is shot. They usually last longer than that, but it's not unheard of that it is.
Now, this is all supposition, but it does fit the facts. During the summer, the incoming water is warmer. Water expands when it is heated. It needs a place to go. Many places use either a check valve to isolate your water from the supply, or if you have a PRV, it acts the same way. In the winter, the incoming water is colder and therefore more dense. So, after you use a bunch of hot water to say do clothes or bath, that cold water then gets heated, expanding more than it would in the summer. That water pushes somewhere. It could literally go back out of the house (condo, doesn't matter), or if it can't, the preferred place for it is into the expansion tank.
Go buy a pressure gauge - about $10. See what the pressure is. You may have to attach it to the washing machine connection, or maybe the drain of the WH (if you do that, drain some first to clean out sediment so you don't clog up the gauge). You can buy adapters and unscrew an areator. Check the pressure. Use a bunch of hot water, then watch the pressure as the water gets heated. If it rises, you need an expansion tank.
The prv (or check valve) could be bad as well.