Leftover rice can be stored for about 6 days in the fridge, and 6 months in the freezer if it is stored correctly in an airtight container. Allow rice to cool before storing, but do not leave it at room temperature for too long. You should never leave cooked rice out at room temperature aka the temperature danger zone between 4° C (40 °F) and 60° C (140 °F) degrees for too long! This is because leaving food out too long at room temperature can cause bacteria to grow to dangerous levels that can cause illness.