80302 Weather -- Boulder, CO
Overview
80302 -- Downtown Boulder and Foothills Neighborhoods, CO
Zip code 80302 is Boulder's central and western zip, covering the most geographically diverse terrain in the city: from the Pearl Street pedestrian mall at 5,328 feet to the foothills neighborhoods of Chautauqua, Dakota Ridge, and Four Mile Creek above 5,500 feet. This zip captures the full range of Boulder's Front Range microclimate -- the Flatirons rise directly above the western edge, creating orographic weather enhancement, strong Chinook wind exposure, and the dramatic thunderstorm season that defines Boulder summers.
Boulder Creek flows through the zip, and the 40th parallel marks the southern edge. The Boulder County seat, major cultural venues including the Chautauqua Auditorium, and the primary Flatirons trailheads are all within 80302. Weather variability here is higher than any other Boulder zip code due to the 200+ feet of elevation range and the direct foothills adjacency.
Fire Risk and History
80302 has a moderate wildfire risk. The western portions of the zip -- Chautauqua, Dakota Ridge, and Four Mile Creek -- border Boulder Open Space directly and sit within Boulder's designated wildland-urban interface zone. The Flatirons and open-space grasslands immediately upslope create meaningful fire exposure during Chinook wind events and dry summer conditions. The September 2010 Fourmile Canyon Fire burned to the northwest of 80302, and the western neighborhoods have periodically been under pre-evacuation advisory during subsequent dry-wind events. The City of Boulder's Wildfire Mitigation Program has defensible-space resources specific to this area.
Elevation and Microclimate
| Elevation | 5370 ft |
| Zip Code | 80302 |
| County | Boulder County, CO |
| Wildfire Risk | Moderate |
| FEMA Flood Zone | Zone AE |
Elevation within 80302 ranges from approximately 5,328 feet at Pearl Street to over 5,500 feet in the foothills neighborhoods, producing distinct microclimates within the same zip code. Western areas near Chautauqua receive orographic precipitation enhancement -- storms that drop 4 inches downtown may drop 6 or more inches at the base of the Flatirons. Chinook winds are felt most strongly in the western and northern portions of 80302, where the Flatiron slopes channel and accelerate downslope flow.
Flood Zone Information
80302 is partially classified FEMA Flood Zone AE, reflecting genuine flood risk along the Boulder Creek corridor. Boulder Creek flows east through the zip from the canyon mouth, and the active floodplain extends through portions of downtown and the lower Pearl Street area. The September 2013 regional flood event produced significant flows through Boulder Creek, damaging infrastructure and closing Canyon Boulevard for extended periods. Properties within or adjacent to the Boulder Creek corridor should verify their specific parcel flood zone designation at FEMA's Flood Map Service Center.