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If by “day” you mean midnight to midnight as opposed to a rolling 24 hour period, then you’d need to accumulate this figure and zero it at midnight.
Just before you zero it then write the value to Superchart and choose the “connect missing data points option”. That should give you a daily total bar chart. -
I don’t try to do this but I guess that I’d record the wind direction in degrees (0-337.5 if you’re using 16 compass points).
I think the problem would be that on a low wind day the wind direction may sit in the same place for hours, but that’s not representative of the actual wind.
Maybe you do it another way and only record the direction when the speed above a certain value? I guess it depends on what info you really want and how much you want it
What sort of measuring equipment are you using?
I’m using the “Maplin” stuff as shown here:
Pete.