DC-area forecast: Sizzling heat again tomorrow, with a smoky haze at times
HAPPENING NOW: Slowly falling back into the 80s this evening. Muggy through the night with lows in the mid-70s to near 80.
Why we use dew point instead of relative humidity
If you want to know how humid it will feel outside, pay attention to the dew point — not the relative humidity.
What permanent daylight saving time would mean for DC
The House passed the Sunshine Protection Act on Tuesday. Is this the time daylight saving time becomes permanent year-round?
Canadian wildfire smoke has arrived in DC yet again, and could get worse
Smoke from Canadian wildfires could bring hazier skies, vivid sunsets and declining air quality to the DC area later this week.
Upcoming heat wave could push DC's 100-degree days deeper into the record books
DC is climbing the historical heat charts as another round of triple-digit temperatures threatens.
How to stay safe in the heat
A heat advisory is in effect for the DC area Wednesday from 11 a.m. to 8 p.m.
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What permanent daylight saving time would mean for DC
The House passed the Sunshine Protection Act on Tuesday. Is this the time daylight saving time becomes permanent year-round?
Is missing weather balloon data making forecasts worse?
Meteorologists are warning that the missing data may be making severe weather forecasts less reliable. The agency in charge of the launches maintains that the lack of balloon data hasn’t degraded forecasts.
'Space jellyfish' lights up predawn skies over the DC area
A predawn SpaceX Falcon 9 launch created a glowing, jellyfish-like plume that was visible across the DC region under clear skies.
From 1776 to 2026: How July 4 temperatures have changed over 250 years
A remarkable 250-year reconstruction of July 4 temperatures reveals just how much America's Independence Day has warmed since 1776.
Rare sprites join northern lights in spectacular Virginia sky
Before the dramatic displays of fireworks and lightning on July 4, another spectacular show unfolded overhead.
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Insider live chat, Tuesday July 14
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Capital Weather Insider: Surprising skies and scorching heat
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Insider live chat, Tuesday July 7
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Capital Weather Insider: Scorching Fourth and toasty oceans
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We predict July will be hotter than normal, boosted by a searing start
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Insider live chat, Tuesday June 30
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A way-too-early July 4 weather forecast for DC (updated)
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Capital Weather Insider: Europe bakes, and DC is next
DC Weather, Explained
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Why we use dew point instead of relative humidity
If you want to know how humid it will feel outside, pay attention to the dew point — not the relative humidity.
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