The Singapore Indoor Stadium's temperature may change based on the event and the outside weather, but it is typically not thought of as being cold. The stadium has air conditioning, and the temperature is usually fixed at between 23 and 25 degrees Celsius to make it comfortable for spectators and performers. However, you might want to pack a lightweight jacket or sweater to wear inside the stadium if you are sensitive to air conditioning or prone to feeling chilly. When going to an event at the Singapore Indoor Stadium, it is always a good idea to check the weather forecast and prepare appropriately.