2. The Weather Channel

itunes.apple.com
Apple's pre-loaded weather app only provides you with a minimal amount of weather information. It only gives you 6 days' worth of weather, only 1 day worth of hourly forecasts, and no radar! Instead, download The Weather Channel app! It provides you with a longer hourly forecast, up to 10 days' worth of weather predictions, a radar map, and even a pollen forecast!