I addition to the variation in climbing types across the US, climbing seasons vary depending on climate, elevation, etc. For many climbers planning a trip, figuring out which area will have the best conditions is often the most challenging task. To help with this, I partnered with MountainProject.com to produce this interactive map showing the seasonability of different regions. Also listed are the top 20 climbing areas for a given month based on season.
To learn more about the process: D3 Hexbins over a Shaded Relief AlbersUS Map.
To see the visualization on MountainProject, visit: www.mountainproject.com/scripts/Factoids