CWG Live updates: Heating up today, dangerously hot and humid starting tomorrow

Washington Post

22-06-2025

Welcome to cwg.live, updated around-the-clock by Capital Weather Gang meteorologists.
Happening now: The heat wave begins with highs in the mid- to upper 90s today. The humidity could be a little higher (and will be soon) so maybe that's a win?
What's next? Monday, Tuesday and Wednesday all have a shot at reaching 100 degrees in some locations. High humidity should have the heat index maxing out between 105 and 115 each day. Have a plan to limit your time outside.
Today's daily digit — 5/10: Here comes the heat. We're well into the 90s today, which might be the 'coolest' of the next three days. | 🤚 Your call?
The digit is a somewhat subjective rating of the day's weather, on a 0-to-10 scale.
Forecast in detail
Today (Sunday): A hot dome of high pressure builds stronger today, providing plenty of sunshine and cranking up the heat. Afternoon highs reach at least the mid-90s, perhaps upper 90s. Humidity is noticeably higher than yesterday, but not the worst, with dew points in the upper 60s to near 70, making it feel as hot as near 100. Confidence: High
Tonight: A southwesterly breeze keeps the warmth in place. Evening temperatures fall back into the upper and mid-80s, with lows in the 70s and partly cloudy skies. Confidence: High
Tomorrow (Monday): Temperatures could break into the triple digits for the first time this year under mostly sunny skies. Afternoon highs head for the upper 90s to low 100s, with the heat index topping out around 105 to 115. Avoid strenuous activity outside, and be sure to stay hydrated and apply sunblock when you are out. Confidence: High
Tomorrow night: It's a toasty evening, with temperatures staying up in the 90s through most of it. Warm and humid overnight, with lows in the upper 70s to low 80s. Confidence: Medium-High
A look ahead
High pressure continues to sit overhead Monday through Wednesday, keeping us mostly sunny and scorching. Be sure to take the heat — highs in the upper 90s to low 100s, heat indexes reaching 105 to 115 — seriously and limit time spent outdoors. Overnight lows dip only to the upper 70s and low 80s. Maybe a stray late-day thunderstorm. Confidence: Medium-High
The heat may relent a smidgen on Thursday, but as of now it still looks like we'll make the mid- to upper 90s, then more like low to mid-90s on Friday. Both days could see a few late-day pop-up thunderstorms. Confidence: Low-Medium
Today's daily digit — 5/10: Here comes the heat. We're well into the 90s today, which might be the 'coolest' of the next three days. | 🤚 Your call?
The digit is a somewhat subjective rating of the day's weather, on a 0-to-10 scale.
Forecast in detail
Today (Sunday): A hot dome of high pressure builds stronger today, providing plenty of sunshine and cranking up the heat. Afternoon highs reach at least the mid-90s, perhaps upper 90s. Humidity is noticeably higher than yesterday, but not the worst, with dew points in the upper 60s to near 70, making it feel as hot as near 100. Confidence: High
Tonight: A southwesterly breeze keeps the warmth in place. Evening temperatures fall back into the upper and mid-80s, with lows in the 70s and partly cloudy skies. Confidence: High
Tomorrow (Monday): Temperatures could break into the triple digits for the first time this year under mostly sunny skies. Afternoon highs head for the upper 90s to low 100s, with the heat index topping out around 105 to 115. Avoid strenuous activity outside, and be sure to stay hydrated and apply sunblock when you are out. Confidence: High
Tomorrow night: It's a toasty evening, with temperatures staying up in the 90s through most of it. Warm and humid overnight, with lows in the upper 70s to low 80s. Confidence: Medium-High
A look ahead
High pressure continues to sit overhead Monday through Wednesday, keeping us mostly sunny and scorching. Be sure to take the heat — highs in the upper 90s to low 100s, heat indexes reaching 105 to 115 — seriously and limit time spent outdoors. Overnight lows dip only to the upper 70s and low 80s. Maybe a stray late-day thunderstorm. Confidence: Medium-High
The heat may relent a smidgen on Thursday, but as of now it still looks like we'll make the mid- to upper 90s, then more like low to mid-90s on Friday. Both days could see a few late-day pop-up thunderstorms. Confidence: Low-Medium