Mountain Weather Forecasts

Plan your next adventure with expert-level weather data that’s easy to use.

Plan With Confidence

Choose the safest day and time for your adventure. We color-code detailed hourly data so that you can quickly find your best weather window. 5-day hourly forecasts include the chance of precipitation, chance of lightning, temperature, wind speed & direction, and cloud cover.

Industry First Know Trail Conditions In Advance

We use recent weather conditions to estimate if the trail is muddy, a little wet, or dry, and we update this every hour. But don’t take our word – we offer one-click access to a visual history of precipitation and temperature during the past 24 hours so that you can make your own call.

High-Resolution Maps

We make it easy (and beautiful) to see if there is precipitation and wildfire smoke heading toward your favorite mountain, or if there is snow cover nearby. And take a peek into the future with our 18-hour forecast animations for precipitation, wildfire smoke, and temperatures.

"If you’re looking for a great weather app for snow and mountains, then look no further than OpenSnow & OpenSummit."
– Chris Davenport, Pro Skier
"Excellent app for mountain weather forecasts with lots of useful additional info all in one place. I've used it often to plan hikes and climbs and found the accuracy to be spot on. I wouldn't think of going into the mountains without checking OpenSummit first."
– Mark, Android User
"If you are a person who likes to hike, bike or just visit the high country and want to have the most accurate weather forecast at various elevations, OpenSummit is absolutely the best app"
– Ed, iOS User

Join OpenSummit Today

Free

$0
2-Day Hourly Forecasts
Save Favorites
Estimated Trail Conditions
5-Day Hourly Forecasts
Current Radar Map Layer
Forecast Radar Map Layer
Wildfire Smoke Map Layer
Snow Depth Map Layer
Temperature Map Layer
OpenSnow All-Access

All-Access

$29.99/year
2-Day Hourly Forecasts
Save Favorites
Estimated Trail Conditions
5-Day Hourly Forecasts
Current Radar Map Layer
Forecast Radar Map Layer
Wildfire Smoke Map Layer
Snow Depth Map Layer
Temperature Map Layer
OpenSnow All-Access

OpenSummit App

Check the latest forecast, radar animation, and trail conditions when you’re heading out. All OpenSummit features are available on our app and website, plus your favorite mountains and settings sync across devices.

Carbon Removal Commitment

To help mitigate the threat of climate change, we have committed 1% of our All-Access subscription sales to the direct removal of carbon dioxide from the atmosphere and its sequestration in secure, long-term storage.