National Weather Service Forecast for: McLean VA
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 10:29 pm EDT Jul 24, 2025
 
Tonight

Tonight: Clear, with a low around 74. Southwest wind around 7 mph.
Clear

Friday

Friday: A chance of showers and thunderstorms, mainly between 2pm and 5pm.  Increasing clouds and hot, with a high near 98. Heat index values as high as 109. West wind 3 to 8 mph.  Chance of precipitation is 30%.
Sunny then
Chance
T-storms
Friday
Night
Friday Night: A chance of showers and thunderstorms, mainly before 7pm.  Partly cloudy, with a low around 77. Northwest wind around 6 mph.  Chance of precipitation is 30%.
Chance
T-storms then
Partly Cloudy
Saturday

Saturday: A chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 94. Heat index values as high as 100. North wind around 6 mph.  Chance of precipitation is 40%.
Mostly Sunny
then Chance
T-storms
Saturday
Night
Saturday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 75. Light southeast wind.  Chance of precipitation is 30%.
Chance
T-storms then
Chance
Showers
Sunday

Sunday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm.  Partly sunny, with a high near 95. Chance of precipitation is 60%.
Slight Chance
T-storms then
Showers
Likely
Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am.  Partly cloudy, with a low around 76. Chance of precipitation is 60%.
Showers
Likely then
Chance
T-storms
Monday

Monday: Sunny, with a high near 94.
Sunny

Monday
Night
Monday Night: Mostly clear, with a low around 76.
Mostly Clear

Lo 74 °F Hi 98 °F Lo 77 °F Hi 94 °F Lo 75 °F Hi 95 °F Lo 76 °F Hi 94 °F Lo 76 °F

Heat Advisory
 

Tonight
 
Clear, with a low around 74. Southwest wind around 7 mph.
Friday
 
A chance of showers and thunderstorms, mainly between 2pm and 5pm. Increasing clouds and hot, with a high near 98. Heat index values as high as 109. West wind 3 to 8 mph. Chance of precipitation is 30%.
Friday Night
 
A chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 77. Northwest wind around 6 mph. Chance of precipitation is 30%.
Saturday
 
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 100. North wind around 6 mph. Chance of precipitation is 40%.
Saturday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Light southeast wind. Chance of precipitation is 30%.
Sunday
 
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 95. Chance of precipitation is 60%.
Sunday Night
 
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 76. Chance of precipitation is 60%.
Monday
 
Sunny, with a high near 94.
Monday Night
 
Mostly clear, with a low around 76.
Tuesday
 
Mostly sunny and hot, with a high near 98.
Tuesday Night
 
Mostly clear, with a low around 75.
Wednesday
 
Mostly sunny and hot, with a high near 97.
Wednesday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Thursday
 
A chance of showers. Partly sunny, with a high near 87. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for McLean VA.