One of our favorite weather apps, Fahrenheit (which also comes in a separate metric version, called Celsius) has a great new feature that really shines with the iOS 5 Notification Center. This app originally caught our attention because in addition to being an efficient and beautiful weather app, it can also display an icon badge telling you the current temperature at all times. Read our original review of the app here. Now, in addition to the temperature badge, you can set up the app to notify you of any changes in the weather as they happen. As the developer explains:

“This feature request has been a feature we added already in iOS4 but we knew the full usage could be noticed only from iOS5. As time flies by we did not find a moment to communicate this properly to our customers.

It works really easy. We have Notification Setting that allows users to receive a Popup/Banner alert from our Push Server. This alert will also appear in the Notification Center and show the temperature of the last update. You can set the number of notifications as you prefer (max 1, max 5 etc) in the iPad/iPhone general settings.

The user will be notified when the temperature changes. We push every 15 minutes. When the temperature stays the same it will be unnecessary to push them an update and the last temperature stays in the NC.

Fahrenheit and Celsius are universal applications, so you can also combine this feature with the standard iPhone weather feature if you prefer. There are Free versions available in the App Store as well since last month.”

Special thanks to reader Daniel C. for the tip.

And now, would you like to win a copy? If so, let us know in the comments. Be sure to specify whether you would like Fahrenheit or Celsius, as they are two different apps. We’ve teamed with the developer to offer our readers ten copies of each one! Both are universal, so it doesn’t matter whether you have an iPhone, iPod touch, iPad, or all three. Winners will be contacted by email on October 27, 3:00 p.m. EDT. Good luck! And if you don’t win, you can always grab the free (limited push notification and city) version of Fahrenheit or Celsius to try it out.