A method and system for calculating daily weighted averages of glucose measurements (or derived quantities) with time-based weights are disclosed. The present invention computes an average daily glucose value using the time based weights based on only consecutive glucose measurements in the plurality of glucose measurements with acceptable time intervals that do not exceed a predefined maximum time interval. The invention further relates to a computer program for implementing the method for calculating daily weighted averages of spot monitoring glucose measurements (or derived quantities) with the time-based weights.
