I want to add a node for openweathermap.org and node-red states:
Run the following command in the root directory of your Node-RED install
npm install node-red-node-openweathermap
I ran this command from my home directory and a node_modules folder with content was created.
The openweathermap node is a version 0.16 and my node-red is version 0.15.3.
To test if it works I really need to know the root of the node-red installation.