Denver woke up to clear skies and about 59°F early Monday, June 22, but the quiet start will not stick around. Highs are expected to push near 90°F this afternoon, with showers and a chance of thunderstorms rolling in after noon. The strongest storms are most likely east of I‑25, where large hail and gusty winds could fire up. Expect pockets of higher humidity on the plains and a rapid warm‑up through the afternoon.
Afternoon Thunderstorm Risk
Showers and thunderstorms are most likely after midday, ramping up in the mid‑afternoon and lingering into early evening. The NWS Denver/Boulder is calling for highs near 90°F today and flags the potential for strong to severe storms across the plains, especially east of I‑25, where very large hail, damaging outflow winds and brief funnel clouds are possible. If you have outdoor plans, keep them flexible and be ready to move quickly into a sturdy shelter if storms roll in.
Timing And Commute
Hourly guidance points to a prime storm window from about 2 to 6 p.m. Monday, with a lingering slight chance into the evening. Brief heavy downpours and sudden gusts of up to 25 mph could reduce visibility and toss around unsecured items, so give yourself extra time for the afternoon commute and slow down on wet roads. Travellers headed through Denver International Airport should keep an eye on airline alerts for short delays if storms pass over the airfield.
Week Ahead And Heat Safety
Tuesday and Wednesday will remain unsettled, with more widespread afternoon storms and a growing chance of impacts along the I‑25 corridor. In the mountains, afternoon winds will bring elevated fire‑weather concerns. By Friday the pattern turns hotter and drier, and highs are forecast to climb into the upper 90s by Saturday, so residents without air conditioning are urged to plan. For cooling-centre locations and heat resources, see the City of Denver.
Be Prepared
If you have outdoor plans this afternoon, consider shifting activities earlier or later in the day, secure loose yard items before storms build, and keep your phone charged so you can receive weather warnings. If you encounter significant hail or see downed power lines, stay clear of the area and report hazards to local authorities.
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