What type of weathering will occur more rapidly in an area with extremely cold winters and hot summers?

Mechanical weathering

Explanation:

The method of turning huge rocks into small ones is mechanical weathering. This process generally takes place near planet's surface. Temperature influences the soil as well. The cool nights & hot days are always expanding and contracting things. It can trigger rocks to crack from fault and break up.

Changes in temperature often result in mechanical weathering. The rocks themselves stretch as temperatures rises Rocks compress slightly as temperatures cool. The result could be the rock's self weakening.