The biggest change is that the AccuWeather widget now appears on the lock screen, so if you live and breathe the weather, you'll always have quick access to the forecast. Whether or not you can trust the forecast, well, that's another question entirely.
Translated maps is the other feature update that comes to version 2.1.6. Speaking of which, the developers infused the app with interactive Google Maps and radar/satellite images.
The AccuWeather app is a free download in Google Play, or $2.99 for the ad-free Platinum version.