Google has added a new layer to Google Maps that brings weather details into the picture related to your location. Now, with Google Maps, you’ll be able to get the exact weather conditions based on your location. The new weather layer will not only show weather details and conditions in your vicinity, but will also provide the conditions across the globe at any instant of time.

The details will be provided by Weather.com, and the feature will display different well-designed icons to help you judge the weather better. To add the weather layer, you need to hover over the widget in the upper right-hand corner and choose the weather layer from the list. Clicking on a weather icon for a certain city will pop up more detailed information such as humidity levels and wind conditions for the next four days.
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via (Google Blog)