The avatar on the left of your posts, points to an invalid website: http://www.knjazevac.co.yu/Meteo/wxindex.php

I checked your previous posts: is this the site you are discussing about: Knjaževac, Istočna Srbija Home Weather Station (wd version) ?
You can check any module and the most recent data form WeatherDisplay as used by the template here
http://vreme.in.rs/knjazevac/pwsWD/w34_module_test.php
Click on “live data values” and they are displayed in the large box below. Those are the “recalculated” values from your upload file = clientraw
If they are uploaded by WDapi there is a button to display the raw WDapi values also

    [wind_direction] => 83
    [wind_direction_avg] => 259

wind_direction comes from clientraw [3]
wind_direction_avg from clientraw [146]

For how the graphs are drawn and on which values they are based, I have to check with BrianUnderdown.

Wim