Typhoon is a desktop weather widget that offers customization of your weather reports. Here's how you can install it in Ubuntu 14.04.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo add-apt-repository ppa:apandada1/typhoon
sudo apt-get update
sudo apt-get install typhoon
Be sure to click through to the source article at Noobs Lab for additional information on how to make Typhoon appear on all of your desktops.
According to Noobs Lab:
Typhoon is free, opensource and elegant weather widget or app for Ubuntu based on Stormcloud, it stays on the desktop just like conky. Unlike conky it offers customization which includes weather metrics 'Celsius' 'Fahrenheit' 'Kelvin' and 'mph' 'kph' 'm/s', and widget color can be changed directly from settings, depend on user eye-candy needs.More at Noobs Lab
Additional Ubuntu resources