YamaWeather: Mountain Forecast

YamaWeather puts everything you check before a climb on a single screen — built for hikers, trail runners and mountaineers.

■ Read the mountain, not just the town
・Summit temperature corrected for elevation: enter the height you are climbing and see the temperature up there
・Lightning risk, wind gusts, freezing level, visibility, UV and precipitation as hourly charts
・A good-conditions window is calculated automatically, limited to the hours between sunrise and sunset
・Forecast up to 16 days ahead, pinch to zoom, customizable chart order

■ See the site before you go
・Nearby public restrooms with walking time and map directions
・Nearby mountain huts and campsites
・Nearby peaks with elevation — tap one to apply its elevation to the temperature correction
・Nearby live cameras (links to the official provider pages)

■ Climbing diary (Pro)
・Start and finish times, with moving time calculated for you
・Log the wild vegetables, mushrooms, alpine plants and insects you find
・Weather at the moment of each entry is saved automatically, then analyzed for patterns
・Terrain notes: mark rock bands, fallen trees and steep sections on satellite imagery
・Face ID lock keeps your records yours

■ Built to be trusted
・No account needed, no ads, records stay on your device
・22 languages, dark mode
・Paid features are a one-time purchase — not a subscription

Weather data is an estimate for reference only. Always judge conditions on site and take responsibility for your own decisions. Do not enter the mountain if there is any risk of getting into trouble.
Weather data by Open-Meteo. Peak elevations: Geospatial Information Authority of Japan.