Xfce panel has a lovely weather applet. You can add it by right-clicking
on the panel (Panel → Add New Items) and selecting it from the list.
A new widget ("No data") should appear at the rightmost part of the panel. It
needs to be configured for your location by right-clicking on it and selecting Properties.
Afterwards, provided that internet access is available, a single left-click on
it produces a very reliable 5-day weather forecast. Neat!