Skip to content

DC-area forecast: Staying very humid tonight, then hotter Thursday

Clouds and contrails in an otherwise blue sky.
Cloud patterns in the sky on Tuesday. (Fred Cochard/Flickr)

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

Happening now: It's a soupy evening with temperatures slowly falling through the 80s. Isolated shower or storm possible, mainly west and north.

Severe T'storm Warning
Tornado Warning
Flash Flood Warning
Hover a warning for details
👆Tap a warning for details

What’s next? Staying humid and turning hotter tomorrow through the weekend. Shower and storm chances continue, mainly during the afternoons into evenings.

Today’s daily digit — 4/10: The heat holds back, but humidity makes a comeback, and we're dodging some showers and storms with a flood risk. | 🤚 Your call?
The digit is a somewhat subjective rating of the day’s weather, on a 0-to-10 scale.

Forecast in detail

Tonight: An isolated shower or storm is possible during the evening, with lower rain chances overnight. Otherwise partly cloudy to mostly clear and staying super muggy with lows in the low to mid-70s. Confidence: Medium

Hourly Forecast | Pollen, Air & UV

Tomorrow (Thursday): Partly sunny and hotter with highs heading for the upper 80s and low 90s most spots. Continued high humidity (dew points still in low to mid-70s) helps the heat index peak in the upper 90s to near 100. The chance of isolated to scattered showers and storms is mainly during the late afternoon into evening and especially from near DC and I-95 to the west. With the higher heat, some storms could be strong to severe with localized flooding and damaging winds. Confidence: Medium

Tomorrow night: Isolated to scattered showers and storms, a few with potential to be strong to severe, remain possible during the evening. Partly cloudy and muggy overnight with lower rain chances and lows in the 70s. Confidence: Medium

📬 Get our forecast in your inbox

Our morning forecast email is back! It's included with every level of support — from Free to Sustainer — delivered 7 days a week. Sign up at: capitalweather.com/support-us

A look ahead

The weather pattern is pretty much stuck Friday through Sunday. Highs should be in the upper 80s to mid-90s, and it's still quite humid with dew points mainly in the low 70s. Late-day isolated to scattered showers and storms are possible each day, although chances may be lower on Sunday. Muggy nighttime lows are around 70 to 75. Confidence: Low-Medium

Similar heat and humidity look to stick around Monday and Tuesday. A chance for showers and storms may linger as well, with Tuesday perhaps having the higher chance.

Mix of puffy clouds and blue skies over the tree-lined Potomac River.
Bubbling clouds over the Potomac River. (Brian Paeth/Flickr)

On this day

DC weather history for August 5

Blistering heat in 1930 pushed temperatures to 102 degrees amid a devastating drought, part of a summer that saw a record number of 100-degree days and severe agricultural losses.

Sunrise6:13 a.m.Sunset8:17 p.m.
Avg High89°Avg Low72°
Rec High102° 1930Rec Low54° 1912Rec Rain2.15" 1878
Read full August 5 weather history →

Today’s daily digit — 4/10: The heat holds back, but humidity makes a comeback, and we're dodging some showers and storms with a flood risk. | 🤚 Your call?
The digit is a somewhat subjective rating of the day’s weather, on a 0-to-10 scale.

Dan Stillman

Dan Stillman

Lead meteorologist and Capital Weather cofounder. Leader in marketing, communications and engagement.

All articles

Sign up to join the discussion.

More in Capital Weather Live

See all

More from Dan Stillman

See all