Does Normals MMR reset at the start of the season?

So I play ranked just to hit gold v for the season rewards and then immediately stop. I play normals 99% of the time. Currently my normals MMR is high enough that I get matched with at least 5+ diamonds (the rest are usually plat) every game, and sometimes full games of nothing but Diamonds.

Will this get reset at the beginning of the season just like Ranked does? Or will I have to keep playing tons of normal games to get back to that point?