You may also want to consider adding some 1-Wire chips to your weather set up. Not "trivial", but not impossible, either.
There are some very nice temperature sensor chips.
But what made me think of 1-Wire is that there is a 1-Wire counter chip which would take a LOT of work out of monitoring that anemometer.
Once you have one 1-Wire chip in your setup, adding more is easy... they all share one pair of wires.
There are many weather recording enthusiasts on the web using 1-Wire at the heart of their systems. A starting point...http://www.arunet.co.uk/tkboyd/e1didx.htm
As for bounce: It is a real problem, but I've had several reed switch based anemometers connect directly to the 1-Wire counter over the years (and to rain tipper reed switches, for that matter) without having to do anything special about bounce. Maybe the counter has bounce-ignoring circuits. Not sure. But I know I can connect reed switches to that counter without hassle.