Hi,

Have you looked in your archive to see what data is in the rain field? 
Assuming you are using SQLite something like:

$ sqlite3 /home/weewx/archive/weewx.sdb

will open your database so you can query it. There are any number of 
queries you could use to investigate the situation, but lets' start by 
summing the rain over the last 24 hours:

sqlite> SELECT sum(rain) FROM archive WHERE dateTime > strftime('%s','now')-
86400;

what does that show? If it shows nothing then we do have aproblem. If it 
gives you the obviously wrong result you can look further at the individual 
records to see which are wrong:

sqlite> SELECT dateTime, rain FROM archive WHERE dateTime > strftime('%s',
'now')-86400 AND rain > 0;

depending on what you find will determine how to fix it.

Gary

On Friday, 25 November 2016 08:39:52 UTC+10, Jim W. wrote:
>
>
> Now if I could figure out why   $span($day_delta=1).rain.sum    produces 
>  384.19 in  ???   Seems a bit high for 24 hours... especially considering 
> we're in a drought! :-) 
>
>

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