elalexander said:
What do you like in terms of the electronic weather stations that are available.
Before you buy a gadget, see what NWS has for your location. They now make interpolated forecasts for any point in the US, based on averaging their nearby observations. Here's one for Poolesville. In particular, look at 'More Local Wx' (nearby sites) and '2 Day History' on that page. (middle of the right column).
NWS Poolesville forecast
If Poolesville isn't close enough, find your map coordinates using Google Earth. Bring up that Poolesville forecast then in the URL bar in your browser, substitute your coordinates for Poolesville's.
The resulting NWS forecast page (and the linked history) is probably the best data available. I think the NWS forecast is better than anything I could forecast even if I had a precise station to know present conditions. I also like their weather satellite 'water vapor' animations. Our rainy weather all comes in from the north Pacific ocean so it's easy to see what's coming at us next.
The western US NWS pages look different than that Pooleville screen. There happens to be an amateur reporting station a mile from me whose 2 day history, with observations every half hour, appears under 'Other local observations'. I can bring up his detail by clicking on a bookmark I set for that purpose. He is one of the stations referenced from this page:
NWS Sonoma County. To see what his data looks like, click on one whose time (most recent observation) shows as current.
For me, professional quality readings, a mile away at the same elevation, is as precise as I would ever need.