Foggy, misty start, scorching finish. Monday, June 29, 2026, is beginning on a murky note around Reagan National Airport and in low-lying D.C. neighborhoods, with patchy fog, mist and temperatures in the low 70s slowing the morning commute. Visibility should steadily improve after sunrise, skies are expected to clear, and most of the District will warm to about 87°F this afternoon. The real story, though, is what comes next, as a fast-building heat wave lines up to blast the region later this week.
Afternoon Heat And Timing
Temperatures are set to climb hard and fast as the week rolls on. Tuesday is forecast to reach the low 90s. By Wednesday, July 1, highs could surge into the upper 90s, and Thursday and Friday (July 2 and 3) are projected to crack the low 100s, while overnight lows only slide into the upper 60s to low 70s. Humidity will pile on, making it feel even worse, with heat-index values potentially hitting the 100 to 110°F range. That kind of heat significantly raises the risk of heat-related illness for outdoor workers, kids and older adults. These details come straight from the local forecast issued by the National Weather Service.
Plan Ahead: Cooling And Safety
With numbers like that on the way, this is the week to reshuffle the schedule. Shift strenuous activity out of the hottest midday hours, drink more water than you think you need, and keep a close eye on vulnerable neighbors, unhoused residents and pets as the temperatures spike. The District operates cooling centers and low-barrier shelters that can be a literal lifesaver during stretches like this. You can find the nearest locations and transportation options at heat.dc.gov, or call the Shelter Hotline at (202) 399-7093 or 311 for assistance. Employers, event planners and outdoor crews should be thinking about extra breaks, shade, lighter workloads or rescheduling where possible.
Thunderstorms And The Holiday Weekend
On top of the heat, forecasters are also flagging a growing chance for showers and thunderstorms late this week into the Independence Day weekend. A passing disturbance could bring widely scattered storms from Friday through Sunday, with at least some potential for strong wind gusts and heavy downpours. Any storms that pop could briefly derail holiday travel, cookouts and outdoor events, so it is worth building a backup plan that includes some indoor time. For the latest watches and warnings, check official forecasts and alerts overnight and again each morning before heading out.
