iPhone Screenshots


OpenSummit is your personal weather forecaster for the mountains.

Conveniently displayed on your iPhone, we provide hourly weather forecasts for mountain locations across the United States. This valuable weather information will help you make well-informed, timely decisions on your next outdoor adventure.

-Chance of lightning
-Chance of precipitation
-Summit temperatures
-Summit wind speeds

Detailed forecasts for the next two days are free. You can view the 3-5 day forecast by upgrading to All-Access.

When you’re not looking for the latest forecast, view recent photos taken near every location or receive tips about weather safety and wilderness education.

— OpenSummit All-Access, In-App Purchase —

Payment for OpenSummit All-Access entitles you to OpenSummit All-Access usage and its features. OpenSummit All-Access is an auto-renewable subscription, which will renew yearly at $19.99. Payment will be charged to the user's iTunes Account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. The account will be charged for renewal within 24-hours prior to the end of the current period and identify the cost of the renewal at that time. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase.

Full terms and conditions can be found here: https://cloudnineweather.com/terms and https://cloudnineweather.com/privacy

Sales through Apple iTunes will be governed by Apple’s refund policy. We value all of our customers and encourage you to provide feedback on your experience. Please get in touch with us at hello@opensummit.com

What's New

Version 1.3.1

Thanks for using OpenSummit! This update adds hundreds of new locations across the United States, the ability to find your location on the Explore map screen, as well as a few minor improvements and bug fixes.

Please help us improve the app even more by sending feedback to hello@opensummit.com

Also, if you enjoy the app, please rate it and write a review on the App Store. Thank you!

Ratings and Reviews

4.4 out of 5

9 Ratings

9 Ratings

Current version works well


The current version finally seems to have all the bugs fixed. Nice job.

Developer Response

Thank you so much for the update and have a great rest of your summer! -SAM

More Stated and More More Mountains


Then it would be worth the download.

Developer Response

Hey @SkiandRun, thanks for your feedback. We started with the 14ers because we felt there was a need for consistent and reliable forecasts to help hikers avoid lightning on Colorado's highest peaks. We have plans to add hundreds of new mountains and trails across Colorado and the rest of the US in the near future. Thanks for using our app and we hope you have a great summer! -SAM

OpenSummit's at the top!


So glad the reliable OpenSnow team developed this app for hikes to Colorado's highest mountains, the 54 14ers. I used this app to plan my backpacking trip to RMNP. Their clear-and-concise hourly forecasts helped me have confidence that I didn't have to start at 0-dark-30 to successfully summit the Longs Peak summit due to storms & lightning. That made my trip a lot more fun!

It's a bonus to be able view tagged Instagram photos of the 14ers to get an idea of recent conditions and temperatures (by noticing the type of clothing).

Developer Response

Thank you so much for the detailed and positive review! Feel free to send an email to hello@opensummit.com with any other feedback. -SAM


Cloudnine Weather LLC
54 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2018 OpenSummit
In-App Purchases
  1. OpenSummit All-Access $19.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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