tmp_min_sd

This parameter quantifies the variability in minimum temperature for each month. The standard deviation is calculated as

where $σmn_{mon}$is the standard deviation for daily minimum temperature in month $mon$ (ºC), $T_{mn,mon}$ is the daily minimum temperature on day $d$ in month $mon$ (ºC), $μmn_{mon}$ is the average daily minimum temperature for the month $mon$ (ºC), and $N$ is the total number of daily minimum temperature records for month $mon$.