Apple iTunes has a Free iTunes Weather App: Instaweather Pro (normally $1.99)

About

Imagine being at a ski area where it's a sunny, but cold day, grabbing a short video of a friend sailing by on a snowboard, with the weather conditions and location overlaid on the video like a professional weather channel. Instaweather Pro 3.5 adds the ability to shoot short videos to demonstrate the current conditions.

• #1 Weather app in USA, Japan, China, UK, Brazil, Italy and other 100 countries
• Downloaded over 17,000,000 times
• Rated 4.5/5 with more than 5,800 reviews

Requirements

• Compatible with iPhone, iPad, and iPod touch.
• Requires iOS 7.0 or later
• This app is optimized for iPhone 5, iPhone 6, and iPhone 6 Plus.