Boulder County spans an extraordinary elevation range — from the eastern plains near the Weld County line at roughly 5,000 feet to the Indian Peaks Wilderness above 13,000 feet — producing distinct weather patterns, fire risk profiles, and flood histories across its communities. Each city and community page covers current conditions via live weather data, stream flow where a USGS gauge is nearby, fire risk anchored on named recent events, and FEMA flood zone designation for that specific location.
Boulder County Communities
- Louisville weather -- US-36 corridor, Marshall Fire 2021, 5,337 ft
- Lafayette weather -- US-36 corridor, Coal Creek drainage, 5,237 ft
- Superior weather -- Marshall Fire ground zero, 5,485 ft
- Erie weather -- eastern plains, Boulder/Weld county line, 5,026 ft
- Longmont weather -- St Vrain Creek city, 2013 flood, 5,000 ft
- Niwot weather -- Diagonal Highway CDP, Left Hand Creek, 5,095 ft
- Hygiene weather -- Left Hand Creek agricultural CDP, 5,069 ft
- Lyons weather -- St Vrain Canyon gateway, 2013 flood, 5,374 ft