Ridgeline

Summit and trailhead weather can be completely different, and that gap is what catches people out. I wanted a forecast that answers whether a day is worth the trip, judged at the elevation you will actually be standing at.

Scores conditions Poor, Fair, Good or Ideal for any mountain, seven days out, across trailhead, treeline and summit separately. Each day gets a 0–100 composite from six weighted factors, with precipitation and wind carrying the most weight, and every sub-score stays visible so you can see what is driving the number rather than trusting it blind. National Weather Service alerts are layered on where they apply.

The score is a weighted judgement rather than a measurement, and the weights are mine. Elevation bands are modelled from summit and trailhead elevations rather than measured by sensors on the mountain, and NWS alerts only cover the U.S. even though the underlying forecast is global.