Blue visualizes your 2-day weather forecast in a fast and colorful interface. Swipe up to see hourly weather represented by color in a unique visual gradient, helping you quickly recognize weather patterns and plan your day accordingly.

Hourly colors are calculated based several metrics including the temperature, humidity, and sunrise/sunset times for your current location. Seeing blue? You'll want to grab a warm coat. Seeing purple? Stay inside with a cup of hot cocoa!

Purple - extremely cold.
Blue - cold winter day.
Green - feeling cool.
Yellow - room temperature.
Orange - feeling warm.
Red - hot summer day.
Pink - extremely hot.

Temperatures are shown in either Fahrenheit or Celsius (controlled by your iOS region settings).

FAQ

Q: How do I change my location?
A: Use your feet. Blue is a minimal app designed to show weather for your current physical location.

Q: How do I change to Fahrenheit or Celsius?
A: Blue automatically shows the appropriate unit for your selected country/region. To change your region go to iOS Settings > General > Language & Region > Region. All regions use Celsius except United States, Bahamas, Belize, Cayman Islands, and Palau which use Fahrenheit.

Q: How do I change my language preference?
A: Blue will automatically use your preferred language where possible. To change your language, go to iOS Settings > General > Language & Region > iPhone Language.

See a gallery of weather from around the world (and submit your screenshot): http://partlyblue.tumblr.com