Below is a version of the the Temporal Transformation Tool when interpolation is performed. Whenever the input data is INST-VAL or PER-AVER, interpolation is performed.   For those cases, the user would only select the output interval, output data type, and output type/location in the Temporal Transformation Tool. 

For PER-AVER interpolation, the values are interpolated to the center of each time interval, and then assumed to be constant across that time interval. For INST-VAL interpolation, linear interpolation is applied between consecutive time intervals.

When aggregating, data type options also include PER-MIN and PER-MAX.  If either PER-MIN or PER-MAX is selected, these options will compute the minimum or maximum value for each point in space, over the given output interval.  This typically useful for converting a set of hourly temperature to daily minimum or maximum temperature.