> 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_min_sd.md).

# tmp\_min\_sd

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

$$
σmn\_{mon}=\sqrt{(\frac{∑*{d=1}^N\*(T*{mn,mon}-μmn\_{mon} )^2 }{N-1}})
$$

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 $$mon$$.