> For the complete documentation index, see [llms.txt](https://swatplus.gitbook.io/io-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swatplus.gitbook.io/io-docs/introduction-1/climate/weather-wgn.cli/tmp_max_sd.md).

# tmp\_max\_sd

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

$$
σmx\_{mon}=\sqrt{(\frac{∑*{d=1}^N\*(T*{mx,mon}-μmx\_{mon} )^2 }{N-1}})
$$

where $$σmx\_{mon}$$is the standard deviation for daily maximum temperature in month $$mon$$ (ºC), $$T\_{mx,mon}$$ is the daily maximum temperature on day $$d$$ in month $$mon$$ (ºC), $$μmx\_{mon}$$ is the average daily maximum temperature for the month $$mon$$ (ºC), and $$N$$ is the total number of daily maximum temperature records for month $$mon$$.