With this innovative forecast template, there's no need for external weather icons, as the weather elements are built-in to tiles. The template design is a blend of styles, with a flare of flat styling, with some added gloss effects. The template is built for easy editability in Photoshop, but .PNG elements are included to build in other programs (such as PowerPoint).
This template is designed at 2500x1600, 4 .PSDs included, along with 21 weather tile .PNGs with varying weather types (similar to how weather icons are packaged), and background/upper third graphic bases, in which you'd place the needed weather tile and insert text and whatnot to complete the template. In Photoshop, text is set and easily editable, and weather for each tile/day can be tweaked by toggling layers & groups on and off.