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DC-area forecast: Drier air today before heat, humidity, and storms return

Photo of a colorful dawn sky over DC on Aug. 1.
A colorful dawn sky over DC on Aug. 1. (Brian Paeth/Flickr)

Always a human at the helm: Updated around-the-clock by Capital Weather meteorologists.

Happening now: Partly sunny skies this afternoon as highs reach the mid-80s with noticeably lower humidity.

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What’s next? Humidity increases again tonight as shower chances return. Wednesday turns muggy, with scattered showers and thunderstorms. Humid weather and daily late-day storm chances continue through the weekend.

Today’s daily digit — 6/10: Digit upgrade today as our dew points dip and temperatures slip. | 🤚 Your call?
The digit is a somewhat subjective rating of the day’s weather, on a 0-to-10 scale.

Forecast in detail

Today (Tuesday): Today comes close to meeting our definition of a Nice Day. Skies are partly sunny as highs reach the mid-80s. Humidity takes a noticeable step back, with dew points in the low to mid-60s. Winds from the northeast at 5 to 10 mph. Confidence: Medium-High

Tonight: Clouds and humidity increase again, along with a chance of showers or a thunderstorm late tonight. Lows range from around 70 to the mid-70s. Light winds from the east at 5 to 10 mph. Confidence: Medium

Hourly Forecast | Pollen, Air & UV

Tomorrow (Wednesday): Humid air returns as clouds, showers and thunderstorms become more numerous. Dew points climb into the low to mid-70s. High temperatures will depend on when rain develops, ranging from the low 80s in wetter areas to the upper 80s where sunshine lasts longer. Rainfall should average 0.25 to 0.5 inches, with locally heavier downpours possible. Winds shift from easterly to southerly at 5 to 10 mph. Confidence: Medium

Tomorrow night: Scattered showers and thunderstorms may continue with otherwise cloudy skies, and muggy lows in the 70s. Confidence: Medium

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A look ahead

Partly to mostly sunny, warm and humid Thursday with highs in the upper 80s to low 90s. Scattered afternoon and evening thunderstorms are possible once again. Muggy Thursday night, with lows in the 70s and a lingering chance of an evening shower or storm. Confidence: Medium

Forecast confidence is lower Friday as models disagree on cloud cover and storm timing. If sunshine dominates, highs could reach the low to mid-90s. More clouds and storms would likely hold temperatures below 90. It remains muggy Friday night, with lows in the 70s and a chance of showers. Confidence: Low-Medium

Expect partly to mostly sunny mornings this weekend followed by building clouds and scattered afternoon and evening showers and thunderstorms. Right now, Saturday appears more likely than Sunday to see rain. Highs reach the low 90s with moderate to high humidity. Nights remain muggy, with lows in the 70s. Confidence: Medium

Looking ahead to next week, daily chances for showers and thunderstorms continue. Early in the week, highs may climb into the low or even mid-90s depending on cloud cover and rainfall, before easing back into the mid- to upper 80s later in the week.

On this day

DC weather history for August 4

Tropical Storm Isaias in 2020 brought record rainfall, strong winds, and tornadoes, knocking out power to hundreds of thousands across the region.

Sunrise6:12 a.m.Sunset8:18 p.m.
Avg High89°Avg Low72°
Rec High102° 1930Rec Low54° 1912Rec Rain2.48" 2020
Read full August 4 weather history →
Matt Rogers

Matt Rogers

Meteorologist and president and co-founder of the Commodity Weather Group. Specializes in long-range prediction.

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