Colorado sits mostly in drought per the U.S. Drought Monitor's July 2026 update — what it means for Boulder Creek supply and water-use planning.

Boulder's frost-free window ranges from 90 to nearly 200 days depending on the year — how to read NOAA's freeze probability data before you plant.

Twenty Ninth Street is Boulder's open-air mall, so the weather is part of the trip. A season-by-season guide to summer heat and thunderstorms, winter wind and cold, and the best shoulder-season windows.

Boulder Colorado weather month by month — NOAA 1991–2020 climate normals for temperature, precipitation, and snowfall, plus seasonal patterns visitors and movers should know.