Apple Sliced reports that ClearWeather HD For iPad And ClearWeather For iPhone are temporarily available for free (normally $1.99).
Cool weather station on the big screen. ClearWeather is the only app that shows you temperature by color so you don’t even need to read the forecast! Plus enjoy a clear and intuitive interface.
• Elegant and clear interface
• Current weather, 24-hour forecast, and 7-day forecast—all are easy to read, thanks to temperatures being displayed by color
• Support for Celsius and Fahrenheit (as well as kph and mph for wind speed)
• Displays local time with locations—no need to use two apps for weather and time
• Weather forecast on the map
• All weather info you might need: Wind direction and speed info, humidity, precipitation, and pressure
• Sunrise/Sunset, Moonrise/Moonset, and Moon phases info built-in
• Share your weather conditions on Facebook or Twitter
More info and links here.