Denver, Colorado – Summer kicks off with a stormy stretch in Colorado as June opens with a multi-day pattern of thunderstorms, gusty winds, and potential mountain flooding. Beginning Sunday, June 1, residents across the Front Range and foothills should prepare for rapidly changing weather through at least Thursday, June 5.
According to the National Weather Service in Boulder, scattered thunderstorms will develop Sunday afternoon, mainly over the mountains, with brief chances extending into Denver and along the I-25 corridor. Wind gusts may reach 40 mph, with lightning, brief heavy rainfall, and small hail accompanying the strongest cells. Monday night into Tuesday, a stronger system will bring widespread rain, especially to areas above 10,000 feet, elevating streamflow and flood risks due to snowmelt.
Localized downpours may cause minor urban flooding, particularly in low-lying areas and near burn scars. Residents should avoid high water crossings, monitor alerts, and secure loose outdoor items before storms roll in.
Sunday will remain warm, near 88°F, with storm chances after noon. Monday shifts to cooler and wetter conditions, with a high of 84°F and rain likely by evening. Showers continue Tuesday (high near 61°F), with overnight lows dipping to the low 50s. Wednesday and Thursday will trend slightly warmer, but unsettled, with lingering showers and highs in the 70s.
While smoke from Canadian wildfires may reduce air quality intermittently, the main focus remains on localized flooding and storm hazards. More rounds of storms are possible beyond Thursday as June’s early summer pattern remains unstable. Stay weather-aware and check local updates daily.
