tmp_max_ave

Average or mean daily maximum air temperature for month

This value is calculated by summing the maximum air temperature for every day in the month for all years of record and dividing the sum by the number of days:

$$μmx_{mon}=\frac{∑_{d=1}^N*T_{mx,mon}}{N}$$

where $μmx_{mon}$is the mean daily maximum temperature for the month $mon$ (ºC), $T_{mx,mon}$ is the daily maximum temperature on day $d$ in month $mon$ (ºC), and $N$is the total number of daily maximum temperature records for month $mon$.