[werk_ag]

... Can any rain gauge actually measure 0.1mm of rain? I would think the bucket tip would require a lot more rain than 0.1mm.

I have referred 0.1mm just as a reference value, however there are some rain gauges that can measure 0.1mm of rain, and 0.2mm are common. The metric versions of the Davis rain gauges, all use a 0.2mm tip bucket.

...2 decimal places is what we normally use. 0.2mm could be rounded up to 0.01

Thanks for that info. If using just 2 decimal places is acceptable to display rainfall in inches, so that option it will be implemented on next software release.