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CWG Live updates: Gorgeous weather to start week before shift toward more heat, humidity

CWG Live updates: Gorgeous weather to start week before shift toward more heat, humidity

Washington Post21-07-2025
Welcome to cwg.live, updated around-the-clock by Capital Weather Gang meteorologists.
Happening now: Increasing sunshine and decreasing humidity this morning with temperatures climbing through the 70s. Afternoon highs reach the low to mid-80s with perhaps a bit of haze.
What's next? Sunshine and delightful low humidity on Tuesday. Then temperatures and mugginess steadily rise through the workweek, with highs well into the 90s by Friday, when storm chances also may return.
Today's daily digit — 9/10: This sunny, dry day is so welcome! It's not a 10 because Tuesday will be even better. | 🤚 Your call?
The digit is a somewhat subjective rating of the day's weather, on a 0-to-10 scale.
Forecast in detail
Today (Monday): It's still somewhat muggy early but the humidity will become less noticeable as the day wears on. Any morning clouds quickly give way to mostly sunny skies as temperatures rise through the 70s. Afternoon highs reach the low to mid-80s, with light winds from the north at 5 to 10 mph. There is the possibility of a little light haze from wildfire smoke working into the area during the afternoon. Confidence: Medium-High 😎 Nice Day!
Tonight: A very pleasant evening as temperatures fall back into the 70s. Overnight, it's mostly clear and cooler than it's been since mid-June, with lows ranging from the upper 50s in our cooler spots to the mid- to upper 60s downtown. Confidence: Medium-High
Tomorrow (Tuesday): This will probably bet nicest day in about a month. Expect beautiful sunshine, low humidity (dew points from 55 to 60) and enjoyable afternoon highs from 80 to 85. Light winds from the northeast at around 5 mph. Confidence: High 😎 Nice Day!
Tomorrow night: Mostly clear with comfortable 70s during the evening and lows ranging through the 60s toward dawn. Confidence: High
A look ahead
Temperatures and humidity slowly ramp up Wednesday and Thursday — but it should stay rain-free. Lots of sunshine both days with highs in the mid-80s on Wednesday and into the upper 80s and low 90s on Thursday. Humidity starts to become more noticeable on Wednesday (dew points in the mid-60s) and it will be hard to miss by Thursday (dew points near 70). The nights also become increasingly muggy with lows from 65 to 70 Wednesday night and from 70 to 75 on Thursday night. Confidence: Medium-High
We're back in the thick of the humidity Friday into the weekend (dew points in the low to mid-70s) and it's also potentially quite hot. Friday may be the hottest day with highs in the mid- to upper 90s, with heat indexes over 100. Highs may step back into the low to mid-90s on Saturday and Sunday because of more clouds. Showers and thunderstorms could develop in the late afternoon and evening on any of the days, but particularly over the weekend. The nights are partly cloudy and muggy, with lows in the 70s. Confidence: Medium
Today's daily digit — 9/10: This sunny, dry day is so welcome! It's not a 10 because Tuesday will be even better. | 🤚 Your call?
The digit is a somewhat subjective rating of the day's weather, on a 0-to-10 scale.
Forecast in detail
Today (Monday): It's still somewhat muggy early but the humidity will become less noticeable as the day wears on. Any morning clouds quickly give way to mostly sunny skies as temperatures rise through the 70s. Afternoon highs reach the low to mid-80s, with light winds from the north at 5 to 10 mph. There is the possibility of a little light haze from wildfire smoke working into the area during the afternoon. Confidence: Medium-High 😎 Nice Day!
Tonight: A very pleasant evening as temperatures fall back into the 70s. Overnight, it's mostly clear and cooler than it's been since mid-June, with lows ranging from the upper 50s in our cooler spots to the mid- to upper 60s downtown. Confidence: Medium-High
Tomorrow (Tuesday): This will probably bet nicest day in about a month. Expect beautiful sunshine, low humidity (dew points from 55 to 60) and enjoyable afternoon highs from 80 to 85. Light winds from the northeast at around 5 mph. Confidence: High 😎 Nice Day!
Tomorrow night: Mostly clear with comfortable 70s during the evening and lows ranging through the 60s toward dawn. Confidence: High
A look ahead
Temperatures and humidity slowly ramp up Wednesday and Thursday — but it should stay rain-free. Lots of sunshine both days with highs in the mid-80s on Wednesday and into the upper 80s and low 90s on Thursday. Humidity starts to become more noticeable on Wednesday (dew points in the mid-60s) and it will be hard to miss by Thursday (dew points near 70). The nights also become increasingly muggy with lows from 65 to 70 Wednesday night and from 70 to 75 on Thursday night. Confidence: Medium-High
We're back in the thick of the humidity Friday into the weekend (dew points in the low to mid-70s) and it's also potentially quite hot. Friday may be the hottest day with highs in the mid- to upper 90s, with heat indexes over 100. Highs may step back into the low to mid-90s on Saturday and Sunday because of more clouds. Showers and thunderstorms could develop in the late afternoon and evening on any of the days, but particularly over the weekend. The nights are partly cloudy and muggy, with lows in the 70s. Confidence: Medium
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