It’s still there but disabled by default, more there SFOS ≥ 4.6 (Foreca / MeeCast): How to (re-)enable weather infos in Events View - #5 by pvuorela
Can get it back by adjusting dconf key, e.g. “dconf write /desktop/lipstick-jolla-home/force_weather_loading true”, and events view settings switch by installing extra package lipstick-jolla-home-qt5-weather-widget-settings.