Chris Izworski
Fall Foliage Timing · satellite history + current weather

Fall Color Timing by Location

Use historical satellite phenology to see when a landscape usually enters its main autumn transition, then check current weather separately before making the trip.

2026 calibration beta

Why a window is better than a fake peak percentage

USA-NPN’s Mid Green-down Median comes from MODIS satellite greenness from 2001–2017. Its median absolute deviation shows how much that timing varied historically. Together they create a defensible timing band rather than an invented “82% peak” number.

Use current observations for the final trip call

This tool is not a live leaf camera or a current-season color survey. Check USDA Forest Service fall color reports and local observations where available, especially once you are inside or beyond the historical timing window.