What is your ambient temperature? I have an EVGA SC+ 980 Ti and at idle with 100% fan speed, it doesn't go above 32 even in the summer, or the crazy hot winter we are having right now.
If your ambient room temperature isn't the cause, I would check the inside of the case for cables which are blocking air flow. Be sure to also check any dust filters on case vents and clear them off.
Your max temperature looks fine, maybe even low if you are playing games like Witcher 3, Crysis 3, or Battlefield.