Temperature influences most of the plants processes, like growth, phorosynthesis, respiration, transpiration, germination and flowering.
In extreme temperatures, like cold temperatures or high temperatures this effects do no happen.
But, within certain temperatures, that may vary with regards of the plant species, if the temperature increases, the plant's processes, such as growth, will speed up and the growth rate will increase. An increase of the temperature also induces the plant to pass from the vegetative state (developement of roots, folliage) to reproductive state (flowering)