WeatherBOX shows current weather and forecast for 7 days. Also it can display current temperature in the system tray, update weather data on the schedule (using Windows Task Scheduler which keeps system resources). WeatherBOX has multilingual interface.

WeatherBOX Features
7-days weather grid;
Current condition display;
Show current condition's temperature in system tray;
Auto-update using system scheduler (don't need resident part for auto-updates);
Proxy support;
Location finder;
Multilingual UI.