Red Oak in the DMV Climate
Red oak is the incumbent here. If your house was built between the 1920s and the 1970s anywhere from Takoma Park to Arlington, the floor under the carpet is very likely 2 1/4 inch red oak strip, often in good enough condition to sand rather than replace. It behaves predictably through the local swing from a 25 percent humidity January to a 70 percent August, provided the boards are metered and acclimated in the room first. What it does not tolerate is standing water, so a red oak kitchen deserves a mat at the sink and a fast response to a leak.
That protocol is the same whether the floor is going into a Bethesda colonial, a Washington DC rowhouse, or a new build in Arlington. It is described in full on our hardwood installation page.