Weather data on ReisLustig is provided by Open-Meteo, an open-source weather API. Forecasts are cached and refreshed periodically; the "last updated" time shown on each page reflects when data was last fetched.
Limitations
Forecasts are estimates and can change quickly, especially in mountain terrain. Conditions at altitude — wind, temperature, precipitation and visibility — can differ significantly from valley forecasts, and can shift faster than a forecast is updated.
Not a safety decision
ReisLustig displays forecast data for planning purposes. It does not determine whether a route is safe or suitable for an individual user. Always check official local forecasts, trail and avalanche bulletins, and current conditions from local authorities before you set out, and be prepared to change your plans based on conditions on the day.