Seasonal guide
When Water Damage Happens in Boulder: A Seasonal Guide
What causes water damage in Boulder homes changes through the year. Here is what to watch for each season, and what to check before it hits.
Seasonal Patterns
Season by season
Water damage in Boulder does not follow a single season. The causes shift month to month.
Late Spring (April–June)
Snowmelt from the Indian Peaks and Front Range runs off fast when temperatures rise. Boulder Creek surges. Groundwater tables rise across the floodplain. Basement seepage and crawlspace intrusion peak during rapid snowmelt years. Wet May storms can deliver 2 to 4 inches in a 24-hour period.
Summer Monsoon (July–September)
Colorado's monsoon pattern brings afternoon and evening thunderstorms from the southwest. Boulder Canyon acts as a funnel. The September 2013 flood came from days of heavy rain in mid-September. Boulder homeowners paid an estimated $31 million out of pocket for creek flooding, about $10 million of it in the South Boulder Creek floodplain. Flash flood watches are routine in July and August.
Fall Transition (October–November)
Early-season snow followed by warm spells creates melt-refreeze cycles. Ice dam risk on older roofs in Mapleton Hill and University Hill increases. Swamp cooler systems that weren't winterized become a freeze-and-burst risk as temperatures drop.
Winter (December–March)
Frozen pipe failures spike during cold snaps. Boulder's cold nights combined with older construction and minimal basement insulation make supply-line failures common in crawlspaces and exterior walls. The holiday period, when homes sit empty, is when undetected failures run longest before anyone finds them.
Water in your Boulder home right now?
Call any hour. An IICRC-certified crew is on-site within 60 minutes, with no extra charge for nights or weekends.