Google Image Chart Creator is a free web tool provided to you by Google. It lets you create a variety of graphs by entering data points. In addition to plotting the data, it lets you customize various aspects of the graphs such as colors and margins. When you first visit the site you view thumbnails of different types of graphs that you can select from.
"Data visualizations for a changing world
The Google Public Data Explorer makes large datasets easy to explore, visualize and communicate. As the charts and maps animate over time, the changes in the world become easier to understand. You don't have to be a data expert to navigate between different views, make your own comparisons, and share your findings. "
Five Cool Things You Can Do With WeatherSpark
1. Get three local forecasts presented in graphs. Two when outside of the US.
2. Compare the weather in San Francisco vs New York.
3. View the global climate trends. And read the details.
4. Check out the monsoon in Mumbai, India. The rain is so dominant that it cools down the air for three months, creating a yearly temperature curve that actually dips in the summer.
5. See an average late July in Houston. The thunderstorms typically roll in around 4pm.
... or tweet your own suggestion!
WeatherSpark is a new type of weather website, with interactive weather graphs that allow you to pan and zoom through the entire history of any weather station on earth.
Get multiple forecasts for the current location, overlaid on records and averages to put it all in context"