This area of technology is not one that I'm the most expert on, to say the least. However, many teachers have weather stations, and it looks as though the National Weather Service is going to have their data available in a more user-friendly format. That will, of course, affect the commercial services that have traditionally served as a filter for the publicly-funded program's data.
From what I can see, it may be worth your while taking the time to become familiar with the format, particularly for the Biology and Earth Science teachers. I'm just making the decision that it's not worth it for me, personally.