WunderMap is a Google Maps mashup developed by Weather Underground that works very well. It provides local weather with data from various data collection sites with a nice Google Maps layer in the background. The interface is quite intuitive and provides spot temperatures in colored circles and options to customize the results as you wish. If you click on one of the temperature circles, it pops up a box with all kinds of weather data from that weather station, including a graph of temperatures for that day. You can also turn on and off up to five different layers. The site went live earlier this week.
via All Points Blog