Iris Hollow Weather -- Boulder, CO

Iris Hollow Neighborhood Weather Overview

Iris Hollow is a north Boulder residential neighborhood at approximately 5,370 feet, positioned along the Iris Avenue corridor between 28th Street to the east and Broadway to the west. The neighborhood occupies a comfortable position in north Boulder's residential grid, shielded from the most intense foothills weather by the neighborhoods above it to the west while retaining easy access to Boulder Open Space and the North Boulder trail system.

Iris Avenue provides direct sight lines to the Flatirons to the west and the plains to the east, making it an excellent natural weather observatory -- residents can watch storm buildups or clearing blue skies in real time from the street. Summer weather follows the Boulder pattern: reliable morning sun, afternoon thunderstorm potential from late June through August, quick clearing by evening.

Winter snowfalls are moderate, and the flat residential streets along the Iris corridor clear quickly with standard snowplow passes. The Wonderland Lake trail and North Boulder Recreation Center are within walking distance, making outdoor activity convenient regardless of season.

Fire Risk and History

Iris Hollow has a moderate wildfire risk, primarily on its western edge where lots approach the North Boulder Open Space boundary. Interior neighborhood areas have lower direct fire risk due to the buffer of established residential development between open-space lands and most homes. Residents near the open-space boundary should maintain 30-foot defensible space clearance, annually clear accumulated debris from gutters and decks, and register for Boulder County emergency alerts at boco911.com. Boulder's Wildfire Mitigation Program provides free property assessments.

Elevation and Microclimate

Iris Hollow's valley-floor position between the foothills to the west and the plains to the east creates a balanced, moderate microclimate. Chinook wind events are present but moderated by the residential neighborhoods above. The neighborhood captures good sun exposure year-round due to its north-south street orientation.

Flood Zone Information

Iris Hollow is classified FEMA Flood Zone X with minimal flood risk. The neighborhood drains effectively via the north Boulder engineered stormwater system and has no significant floodplain hazard. The September 2013 regional flood event had minimal impact on Iris Hollow; Boulder Creek corridors to the south carried major flows but the neighborhood drainage infrastructure managed local runoff without significant street flooding. Property owners near any local drainage swale should verify their specific parcel flood zone at FEMA's Flood Map Service Center.