Gis-Weather widget tool is easily and massively customizable for Linux desktop, it displays detailed weather forecast. It acts just like conky but with this you don't need to worry about fixing the code in any kind of script, it has super easy weather setup. You can add as much location as you want and add as many widgets as you like, you choose location by right-click + choose to display weather information on the widget. It allows you to change its appearance (background, icons, text, window settings), display on all desktops, lock position to the desktop, choose presets themes for widgets and more customization can be done from its preferences.

• View weather for several days
• Detailed weather forecast for today and tomorrow
• Fast switching between cities
• Select the background and theme weather icons
• "Compass" with the wind direction, with adjustable angle of rotation
• Highlighting the high wind
• Supported weather services Gismeteo.com:AccuWeather.com OpenWeatherMap.org
• Support SVG and widget scale
• Indicator to panel
• Presets

Install the widget

sudo add-apt-repository ppa:noobslab/apps
sudo apt-get update
sudo apt-get install gis-weather

Remove the widget

sudo apt-get remove --purge gis-weather

Gis Weather download | SourceForge.net
Arch Linux users can install Gis Weather via AUR.