This free weather app provides 2 sets of data based on the users location. Displayed is the current, minimum and maximum temperature, condition along with a 7-day forecast.
To open the app, simply tap the app icon. You can also scroll down to see more forecast (up to 7 days out).
Presently, the data is displayed for the current location and utilizing Fahrenheit.
The weather data used in the rainy-shiny-cloudy app comes from openweather.org.
UPDATE: Ability to display weather for other locations.