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Clear Outside

By First Light Optics

This app is only available on the App Store for iOS devices.


Reliable weather forecasts for astronomers with an emphasis on cloud cover.

Features include:

• Seven day hourly forecasts, updated hourly.
• Low, medium, high and total cloud cover.
• Moon rise/set times and phase.
• Sun rise/set and transit.
• Civil/nautical/astronomical darkness.
• ISS pass-over information.
• Automatically provides a forecast for your current location.
• Save favourite locations for easy access.
• Daytime forecasts for solar observers/imagers.

Updated hourly. Frequent hourly updates are important because often the clear spell between showers provides excellent seeing and 30-minutes under a clear sky with a grab-&-go telescopes is pure gold!

Did you notice the ISS pass-over information? The times are precisely calculated for your location and displayed alongside the cloud forecasts so it has never been easier to observe. It is our favourite feature :-)

Also includes regular weather data (wind, rain, frost, temperature, dew point, etc) so perfect for those wanting a detailed weather forecast, without cutesy graphics.

We have had a lot of fun building and testing Clear Outside and are keen to to develop it further so if you find it useful or have suggestions, please let us know.

iPhone Screenshots

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Customer Reviews


Just tried it out. Can't believe they didn't test their app. When you go to select a location, it actually selects the one below it. I tried a few different locations and they all did the same thing. So to add a location I have to tap on the one on the list above it.

Its location search itself doesn't always work. I looked for Salem and nothing showed up. Then I did a search of "Salem, M" only because I know what county it's in. And it finally brought it up as an option.

Buggy app which makes me distrust the weather readings it provides for an area are incorrect.

Helpful and useful for Astronomy

Get cloud predictions at different altitudes, sky brightness, ISS flyovers etc. Just about any detail that would affect astronomy viewing is listed in a easy to understand format.

Selecting a location can be frustrating as there is a bug but it can be overcome by typing enough name detail to eliminate multiple possibilities. Otherwise the app works well.

App is spot on

I've gone through a few weather apps. This is just spot on. I can depend on this while planning a night looking at the stars. Just a wonderful app.

Clear Outside
View in iTunes
  • Free
  • Category: Weather
  • Released:
  • Version: 1.0
  • Size: 0.7 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.1 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version: