I've spent a little time getting some really nice weather icons to display in node-red dashboard which have mappings for wunderground, darksky, forecast, Yahoo, & other services.
The icons can be sized, flipped, rotated or changed colour.
I've modified the file paths from the original author to avoid conflicts with node-red, and also updated the read.me to include a section specifically about installing in node-red. See https://github.com/Paul-Reed/weather-icons for installation files
UPDATE 22/12/2016
If the icons are loaded externally via a ui_template (as the example flow below), then the wi icons can be loaded elsewhere, in the same manner as the Font Awsome icons. So for example to add a wi icon to a dashboard tab, add wi-wu-cloudy
.
UPDATE 20/10/2017
Add the icon files to the dashboard app.cache to prevent repeated requests for authorization when using password protected dashboards.