Mountain-Forecast.com

Very impressed - preparing for Mt Whitney and having the ability to see what the temperature is not only at the summit, but at the camp ground, completely saved the trip. Apple had the temperature 35° warmer than the altitude feature on mountain forecast - could not be more grateful to prepare appropriately for sub freezing temps. Also the 3D maps are the best I’ve seen.

In the month I’ve been using this app the forecasts are more reliable than NOAA

I normally hate paid subscription/paywall apps but as of this writing it’s only $3.99 for monthly and worth every penny for what I’ve found to be a pretty accurate forecast on several climbs.

Forecasts for specific mountains you can't find anywhere else

The best mountain weather app in the game. Multi-elevation reports and long range forecast’s are key when planning trips into the backcountry.

Instead of piecing the forecast together from multiple apps and websites Mountain Forecast has been the one stop shop for the most accurate forecasts per mountain. Normally I’d have to make my own predictions based off general location data. Now it’s as easy as looking up your mountaineering subject of choice and bingo everything you will need all in one place. It’s been extremely accurate for me so far. I 100% put trust in Mountain Forecast for my weather info. Perfect for making sure I stay safe and prepared out in the mountains. I highly recommend giving it a try and use it along side your normal weather forecasting process and see what gives you better results and ease of use. For full transparency I pay for the subscription and think it is worth the price, data and ease of use make it a great value. In my opinion you can’t put a price on making it home safely after a trip out into the mountains and accurate forecasts are essential!