On Fri, 5 May 2006 22:36:32 +0100, Steven Briggs
wrote:

I been thinking about doing just that.

As you might have guessed, I have some standalone software that does
just that and computes a range of other monthly summary values from
the Weatherlink archive files. The calculation of bright sunshine
values was calibrated against several months' worth of CS data and
there's also proving to be respectable agreement with the Instromet
sunshine recorder. The software is almost ready for general use - I
just need to find time to tidy up some loose ends.

John Dann
www.weatherstations.co.uk