[Expect] has a "weather" command supplied as an example in its source
distribution.

"[A little rain forecaster]",
[Jason Tang]'s [tclweather] applet,
[Iain B. Findleton]'s collection of weather-related [tclfltk] demonstrations,
and ...
are all interesting.



Several of the documented [TclSOAP]
examples focus on weather data.