Good morning,

So, moving on from my last question about rainy days over 1mm (Thanks Tom) 
I have a few questions about the Xstats extension.

1) I expected, possibly wrongly,  xStats would have available the 
same Aggregation types although this does not seem to be the case.    So 
its not possible to get rain days greater than 1mm using 'rain.sum_ge ...' 
as it raises an error.  Is this by design or error?

2) Also both last_year and last_year_todate are returning N/A for all the 
temps and sums.  I accept last_year might be due to the age available in 
the current database but would expect to see values from last_year_todate.  
 

As I explored the xstats.py file I saw that lines 106-110:
*last_month_stats = TimespanBinder(TimeSpan(start_ts, stop_ts), db_lookup,*
*context='last_year_todate', formatter=self.generator.formatter, 
converter=self.generator.converter)*

*last_month_stats* has the same context as *last_year_stats*.  Is this just 
a label and irrelevant to the problem I have described above?

3) Finally, for context what I would like to do is compare data from the 
station to those column headings used by the UK Met Office for their 
published regional climate averages that go back 60 years:

   - Maximum temperature (°C), Minimum temperature (°C) - I believe these 
   are actually average max and average min.      
   - Days of air frost (days) - Days where temperature fails below freezing 
   level (0°C / 32 °F) 
   - Sunshine (hours) - I believe this is not possible with the data 
   available. 
   - Rainfall (mm) - We have this as rain sum.
   - Days of rainfall ≥1 mm (days), 
   - Monthly mean wind speed at 10 m (knots)).  

My current plan is to 
use http://www.weewx.com/docs/customizing.htm#Programming_interface to get 
these values where they are not already available.

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