On the Lacrosse is the main part with the rain sensors and the anemometer seperate, in that the anemometer could be at the top of a pole and the rest down beside the chimneys ( sheltered ) , i know the Davis is like that.
I can only speak for the WS2310 and am presuming that the 2350 is similar....The outside hunidity/temperature sensor contains the Tx (I use the wireless mode to the Console, but it could be wired) and this is connected by separate cables to the anemometer and rain guage (these cables are about 10m/30ft long and can be extended further I believe)....thus it is possible to place the individual sensors in reasonable locations....My anemometer (vane and fan) happens to be at the top of a sawn off Cupressus tree, the Temp/hygro at the foot (not too sheltered but on the north side within a home made plant-tray Stevenson Screen) and finally the rain guage is on a short post on the lawn....note though, that for this setup my Vortex windspeed unit is actually up on the same mast as the Davis anemometer but is of the wired type...
I hope this helps.