Not all plants have the same temperature requirements. Carefully read the instructions that come with your plant for any specific temperature requirements. As a general rule, most house plants do well in day time temperatures of 65° F to 75° F and 50° F to 60° F night time temperatures. These temperatures can vary as much as plus or minus 10 degrees for most plants. Plants with different temperature requirements will generally have that noted prominently in the printed planting instructions that come with the plant.
Major temperature fluctuations are harmful to indoor plants. Try to keep the temperature as stable as possible in the rooms where your indoor plants live.
The leaves will turn yellow and fall off on plants that are grown in temperatures that are too cold. A plant that is grown in temperatures that are too hot will be small and will have weak stems and leaves.