WASHINGTON, D.C. — Temperatures in the D.C. area will reach the mid-70s to low 80s on Saturday, August 22, 2026. The AccuWeather forecast for Saturday in the D.C. region predicts highs between 75 and 78 degrees Fahrenheit with southeast winds at 5-10 mph. According to their official weather forecast page, the outlook includes a 70% chance of rain, with a high of 78°F and a low of 70°F.

Even though Saturday will be extremely muggy, temperatures will only reach the mid-70s to low 80s across the D.C. area, which is below average for this time of year, said 7News First Alert Meteorologist Veronica Johnson. The AccuWeather forecast for Saturday night in the D.C. region predicts a low of 70 degrees Fahrenheit.

Additional showers and thunderstorms are expected Saturday evening and overnight in the D.C. region alongside a cold front. Flood risks are highest along and east of I-95 Saturday, so keep this in mind if your travels take you to the Eastern Shore, Johnson said.

Cooler and drier conditions are forecast for Monday and Tuesday in the D.C. region. The AccuWeather forecast for Wednesday in the D.C. region predicts a high of 85 degrees Fahrenheit and a low of 69 degrees Fahrenheit.

Timeline

High humidity is present in the D.C. region on Saturday, August 22, 2026. Showers and storms are expected in the morning and evening in the D.C. region on Saturday, August 22, 2026.

Why It Matters

The combination of high humidity and storm activity creates specific hazards for travelers and residents in the D.C. region. Isolated flooding is a potential outcome of the atmospheric conditions, with risks concentrated along and east of Interstate 95. This geographic focus affects commutes and travel plans, particularly for those heading toward the Eastern Shore.

The presence of a cold front moving through the region overnight signals a shift in weather patterns. While Saturday brings muggy conditions and rain chances, the front is expected to reduce humidity by Sunday. This transition leads to cooler and drier air arriving early in the following week, altering the comfort level and precipitation outlook for the area.

The National Weather Service has issued a flood watch for areas east of I-95, including Prince George’s County in Maryland and Northern Virginia suburbs, effective from late Saturday morning through Sunday morning. Rainfall totals could reach up to two inches in some locations, with locally higher amounts possible in thunderstorms. Storms may also produce frequent lightning, gusty winds, and brief downpours that reduce visibility on roadways.

Transportation officials advise drivers to avoid flooded roadways, as just six inches of water can cause loss of control of a vehicle. More than a foot of water can carry away most cars, according to federal safety guidelines. Emergency management teams in D.C., Maryland, and Virginia are monitoring river levels and drainage systems ahead of the storm system.

Outdoor events scheduled for Saturday may face delays or cancellations due to the unsettled weather. Organizers are encouraged to have shelter plans in place for attendees. The Tidal Basin and Anacostia Riverwalk Trail have experienced flooding during similar past events and could see standing water if heavy rains persist.

By Sunday, conditions are expected to improve as the cold front clears the region. Skies should gradually become partly cloudy, with temperatures near 80 degrees. Humidity levels will drop, providing more comfortable conditions into the workweek.