The Smart Rain Gauge should be placed horizontally, if possible 50 to 150 cm above the ground, and at a distance equal to the height of the surrounding obstacles (by default 3m).
The Smart Rain Gauge cannot measure snow, but it can be left outside.
The Smart Rain Gauge has a standard 1/4-inch camera mount screw thread, which you need to use to fix it properly in place.
A support for the accessories of the Netatmo Weather Station is available on the Netatmo online store.
NB: See this article for help to setup your product.