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. View the 3-5 day forecast by upgrading to All-Access.

— 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 1.3.2

Thanks for using OpenSummit! This release adds support for iOS 12, updates for iPhone X/XR/XS, the removal of Instagram, and a few other minor improvements and bug fixes so that you're always prepared with the best weather information.

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

4.5 out of 5
11 Ratings
11 Ratings
hpizzle57 ,

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

SkiandRun ,

More Stated and More More Mountains

Then it would be worth the download.

Developer Response ,

Hey @SkiandRun, we recently added ~1,000 mountain locations to the app. Have you had a chance to check it out? Thanks for the support and feedback. -SAM

Pasrich ,

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
36.8 MB
Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2019 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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