By Cloudnine Weather LLC

  • Category: Weather
  • Release Date: 2016-09-14
  • Current Version: 2.1.0
  • Adult Rating: 4+
  • File Size: 66.89 MB
  • Developer: Cloudnine Weather LLC
  • Compatibility: Requires iOS 14.0 or later.
Score: 4.76739
From 417 Ratings


OpenSummit is your trusted source for the most accurate weather forecast, high-resolution map overlays, air quality, and trail conditions information. “From smoke to lightning, trail conditions to wind chill, OpenSummit is the one-stop-shop for planning my summer adventures." – Cody Townsend, Pro Athlete Get Outside With Confidence Choose the best day and time for your next adventure. We color-code detailed hourly data so that you can quickly find an ideal weather window. 5-day hourly forecasts include the chance of precipitation, chance of lightning, temperature, wind speed & direction, cloud cover, and more. Compare Forecasts Finding the ideal location for your next adventure based on the weather can feel overwhelming. With OpenSummit, deciding where to go is easy. Compare the latest weather forecasts for your favorite locations on a single screen in just a few seconds. View Estimated Trail Conditions Before heading out on your next hike or mountain bike ride, check our estimated trail conditions. We use recent weather conditions to estimate if the trail is snow-covered, muddy, a little wet, or dry, and this information is updated every hour. Track Storms With High-Resolution Maps We make it easy (and beautiful) to see if there is precipitation and wildfire smoke heading towards your location, and if there is snow cover, lightning, or poor air quality nearby. You can also take a peek into the future with our 2-day forecast animations for precipitation, wildfire smoke, cloud cover, wind gust, and temperature, as well as the global air quality forecast for the next 5 days. Climate Change Commitment We send 1% of our All-Access sales to innovative projects that directly remove carbon dioxide from the atmosphere and ensure its sequestration in secure, long-term storage. This alone will not solve climate change, but it’s a start. OpenSummit All-Access • 5-Day Hourly Forecasts • Estimated Trail Conditions • Current & Forecast Radar • Wildfire Smoke Forecast Maps • Air Quality Map • Air Quality Forecast Map • Real-Time Lightning Map • Estimated Snow Depth Map • Estimated 24-Hour Snowfall Map • Cloud Cover Map • Wind Gust Map • Temperature Map • Offline Maps • OpenSnow All-Access — All-Access, In-App Purchase — Payment for All-Access entitles you to All-Access usage and its features. All-Access Single is an auto-renewable subscription, which will renew yearly at $29.99. All-Access Group is an auto-renewable subscription, which will renew yearly at $39.99. 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. If the auto-renewal fails due to a payment issue, you will still be able to access the paid content for 16 days while Apple attempts to collect payment. 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



  • Saved my summer road trips from ruin

    By Kav, MD
    The mountain weather is now so much more complicated in the West with fires and smoke. This app brings everything together and lets you plan your missions with remarkable insight. For the last 3 summers, my road trips across the US would have been nightmares without this valuable info. What a great bargain, too.
  • Doesn’t do much unless you subscribe

    By MommyinTruckee
    It do doesn’t give you info unless you subscribe.
  • Unmatched forecasting

    By EMunkW
    I live on a large lake in northern Utah that seems to make it difficult to predict weather forecasts. Open Summit is the only source I use now to view upcoming storms and get reliable weather predictions. I really love the smoke (surface) overlay, and air quality forecast in summer months in order to plan for days that my children should play indoors. I love this app and am constantly sharing screenshots of maps to family and friends. Well worth the $20 annual fee.
  • Phenomenal App

    By Dave42299
    Great job to the team, this is incredible!
  • Best mountain weather app

    By Troy wrightstone
    I use it for all of my climbs! Great app and definitely recommend buying it
  • Great App

    By CR LN
    Love this app always consult it when planning outdoor activities. Especially like the breakdown of rain, lightening etc.
  • THE primary source for Mountain weather

    By DrewStansen
    Absolutely vital resource for anyone planning travel and activities in the Colorado mountains, or, frankly any other US mountain region. The maps and layers are the best. For winter use, the sister app OpenSnow is also a must have.
  • Great app for planning summer mountain hikes

    By Dave.223
    Great app for planning summer mountain hikes
  • Great guide!

    By Tee😀
    So thankful for this app! It is our go to before we hike a mountain!
  • Go-to app for air quality info and more!

    By cchinma
    I love this app for air quality info and wildfire smoke info, including FORECASTS!



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