Idea of Rain Gauge Icon
This logo is shaped like a black and white gauge with a lot of different lines for measurement. There seems to be some liquid about halfway up it. There is also a droplet or something coming out of the bottom.
This page contains the Rain Gauge vector icon, as well as variations of this icon in different visual styles, and related icons. All icons are in the flat vector style, however, differ by the line thickness, fill, and corner radius.