if you are referring to the engine coolant temperature, the green (cool) light on the dash goes off when it reaches 55c and the max I got when driving for long trips and/or in traffic is 85c (never heard the radiator fan spinning thus need to check at what temp the fan goes on, the outside temp in my country is around 28 to 30c
Edit: fan starts at 95/96 celcius
the coolant has been replaced a month ago using toyota super long life
hope it helps