Reasoning over mutliple data sources

Hi,
I would like to get some idea if there is any best practice in application
design/architecture for what I want to achieve. My use case is to enrich
application data stored in a jena model with public data coming from
dbpedia.org. I want to do some reasoning over this combined data. The
question is how to best achieve this reasoning over multiple data sources.

Spanning a kind of "remote" jena model over dbpedia.org seems not to
possible to my knowledge. Correct me if I´m wrong. So, the only option I
can see is to copy the data I need from dbpedia.org via sparql, but store
it locally in a jena model. Alternatively, there are dbpedia datasets, I
can directly import into jena. While this will work well for dbpedia data
it might be not well suited for more volatile data. Let´s imagine weather
related data which might change within minutes.

Looking forward to your ideas and suggestions.
Best regards,
Stefan