OpenSummit is your personal weather forecaster for the mountains.

Conveniently displayed on your iOS device, we provide hourly weather forecasts for over 1,000 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 Precipitation
-Lightning Potential
-Hourly Temperature
-Hourly Wind Speed

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

— All-Access, In-App Purchase —

Payment for All-Access entitles you to All-Access usage and its features. 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: and

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

What’s New

Version 1.4.3

We’re on a quest to make things simpler and to provide even more value to our $19.99/year All-Access subscription. In doing so, we’re excited to share that we have combined all OpenSnow and OpenSummit accounts, including the All-Access subscription.
ONE login and ONE subscription is all you need to see the All-Access features on BOTH OpenSnow and OpenSummit!

This update also includes:

• iPad support
• Other minor improvements and bug fixes that you might not notice but make us feel good.

Please help us improve the app even more by sending feedback to

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

Ratings and Reviews

4.6 out of 5
16 Ratings

16 Ratings

qbencigar ,

Super Helpful

We vacation each year in Breckinridge, nothing could be more helpful in planning our trip than this app. Anyone that travels or hikes in the mountains know exactly what I mean. Each day provides you with a 3 season option!!

Developer Response ,

Thank you so much for your kind words and positive review! Have a great summer! -SAM

CaptKirk8 ,

Great app

The exploration feature is helpful and provided some good info. I live near the Appalachians in Virginia, so I wasn’t sure how much support this app would provide in that regard (seemed Rocky-focused). Pleasantly surprised. I don’t see anything in here about cloud coverage. Seems like a basic thing to know for bringing a hat or sunglasses.

Developer Response ,

Hi CaptKirk! Great idea about cloud cover (and yes, this is pretty basic and we should have included it most likely). We'll work to add that this summer! -JOEL

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


Cloudnine Weather LLC
40.2 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2019 OpenSummit
In-App Purchases
  1. All-Access 1-Year Subscription $19.99


  • Family Sharing

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

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