Summit Weather Japan: YAMAYOMI

Summit forecast, 1,059 peaks

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Free, no account. Summit-corrected forecasts for 1,059 Japanese peaks, rated 5 levels from gusts, rain, lightning and cold. All 100 Famous Mountains, 7 days ahead. YAMAYOMI rates the summit weather of 1,059 Japanese peaks, including all 100 Famous Mountains (Hyakumeizan), so you can pick the right day and the right mountain in 30 seconds. Free, no account. SUMMIT CONDITIONS, NOT VALLEY WEATHER Every forecast is corrected to summit elevation. Gusts, precipitation, lightning, hypothermia risk and visibility are combined into a 5-level climbing score. Daily ratings use the harshest hour of the walking window (6:00-15:00), so the score errs on the safe side. MAP FIRST Peaks appear as color-coded pins on a nationwide map. See at a glance which mountains look good this week. Switch layers between score, temperature and wind. 7-DAY OUTLOOK Each peak shows daily scores for the next 7 days, with gusts, precipitation and the summit's low temperature. ASK "WHEN SHOULD I GO?" Pick a mountain and get a plain-language answer about which day looks best and why (wind, rain, temperature). Compare several peaks side by side. 1,059 PEAKS Based on the Geospatial Information Authority of Japan's list of major mountains. All 100 Famous Mountains are included. PRIVACY No ads, no account, no location tracking. Usage statistics can be turned off in Settings at any time. NOTE Ratings are estimates from weather models and may differ from actual conditions. Trail status, snowpack and hut information are not included. The final decision is yours. Mountain data: Geospatial Information Authority of Japan. Forecast: Open-Meteo.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Store listing updated (English added). Minor improvements.

Version 1.0.3

The developer, 合同会社SUTEKINA JIKAN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • SUTEKINA JIKAN ,LLC
Size
  • 39.3 MB
Category
  • Weather
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • Japanese
Age Rating
4+
Copyright
  • © 2026 SUTEKINA JIKAN, LLC
  • Developer Website
  • Privacy Policy

    • More by 合同会社SUTEKINA JIKAN