Motor Overloads

There is no valid universal answer, it varies by each individual OL relay manufacturer, even by product within the same mfr's portfolio.

There are what are called "Ambient Compensated" overload relays in which case you need do nothing at all because they have a separate internal thermal sensor that adjusts the trip curve pick-up point in accordance with the relay ambient so that the trip curve is automatically biased to protect the motor.

Solid State overload relays are NOT based upon temperature at all, they SIMULATE the effects of temperature on the motor, but do so based SOLELY on the current flow through the sensor.

Then there are bi-metal "Ambient Insensitive" overload relays in which you need do nothing within a certain range, because the bi-metal element is designed to deform at a much higher temperature than others, so the effects of ambient are less important, but if your ambient falls outside of that range, typically -20 to 60 degrees C, you must take action (most IEC bi-metal overload relays fall into this category).

Then there are those that have no compensation, such as NEMA style bi-metal and eutectic melting alloy overload relays, so you need to very specifically do manual compensation, which itself varies by selecting different values of replaceable heater elements (if it has that kind), changing the dial setting, or adjusting a compensation setscrew.

RTFM.