[hanley]

Why would someone use this instead of Weather Underground, Weather.com, WeatherSpark, Forecast.io, etc.? It doesn't seem very specific to climbing and there doesn't seem to be much room for growth since Mountain Project is already the go-to site for route and community information.

[jonstjohn]

I think the main benefit of ClimbingWeather.com is ability to quickly find climbing areas. Looking for the forecast for Indian Creek, Joshua Tree, the Gunks, Cathedral Spires? You don't need to find the nearest town or hope the forecast is right (maybe you'll find it is 10 degrees difference due to elevation). Agreed that the growth potential might be somewhat limited, but there is still a small and solid audience that likes the format.