Just another thought... Maybe it would make sense to separate out the sampling for wind speed. That seems to have the shortest interval between updates (2.5 seconds) for the Davis Vantague Vue.
2.5 seconds - Wind Speed, Wind Direction, Direction of High Speed
10 seconds - Dew Point, Outside Temperature, Heat Index, Wind Chill
20 seconds - Rainfall Amount, Rain Storm Amount, Rain Rate
50 seconds - Outside Humidity
60 seconds - Barometric Pressure, Inside Humidity, Inside Temperature