Hello and welcome to the forum
Your temperatures aren't exceptionally high. Browsing this forum, my notebook has a CPU temp 47°C. When watching videos, it's in the sixties, i believe i've seen 69°C.
You could check the Lenovo support site whether they offer a BIOS update. If they do, you might want to flash the new BIOS version.
If you don't have the Lenovo ThinkVantage Power Manager installed, install it. Check what power scheme or profile the notebook uses there. You might want to define your own power scheme or power profile in Power Manager.
If you don't have Lenovo ThinkVantage System Update installed, install it. Let it check for new driver versions. Install any drivers that you suspect could influence fan behaviour.