A weather applet for the COSMIC desktop panel.
![]() |
![]() |
- Current conditions - temperature, feels-like, humidity, wind & gusts, precipitation, AQI, and UV index
- Click More for dew point, pressure, and the pollutant breakdown (PM2.5, PM10, ozone)
- Worldwide weather alerts, shown inline when active
- Hourly and 7-day forecasts - click any day to expand its detailed forecast, wind, precipitation, and sunrise/sunset
- Automatic data sourcing by location via weathervane:
- NWS (National Weather Service) - US locations, free, no API key
- Open-Meteo - worldwide, free (CC BY 4.0)
- JMA - Japan, free
- Location search via Nominatim (OpenStreetMap), with multiple saved locations
- Imperial/Metric toggle - click the hero temperature to switch between imperial (°F, mph, inHg) and metric (°C, km/h, hPa)
- Panel display - day/night-aware weather icon and current temperature
Download the latest release from the Releases page.
sudo apt install ./cosmic-ext-whether_0.3.1_amd64.debflatpak install --user ./cosmic-ext-whether_0.3.1.flatpakRequires Rust, just, and system dependencies:
sudo apt install libxkbcommon-dev wayland-protocols libwayland-devjust build-release
just installThen add Whether to your COSMIC panel via Settings > Desktop > Panel > Applets.
just uninstallIf you previously installed via sudo just install, run sudo just uninstall-system once to clear the old /usr install.

