National Weather Service Forecast for: McLean VA
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 7:34 pm EDT Sep 12, 2026
 
Tonight

Tonight: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Low around 69. Southeast wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers

 Sunday

Sunday: Showers and thunderstorms before 8am, then a slight chance of showers between 8am and 9am. Patchy fog between 7am and 8am. High near 86. Calm wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers and
Patchy Fog
then Partly
Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 69. Calm wind becoming northwest around 6 mph after midnight.
Partly Cloudy

 Monday

Monday: Mostly sunny, with a high near 80. North wind around 11 mph, with gusts as high as 21 mph.
Mostly Sunny

 Monday
Night
Monday Night: Mostly clear, with a low around 56. Northeast wind 5 to 7 mph.
Mostly Clear

 Tuesday

Tuesday: Sunny, with a high near 81.
Sunny

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 59.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 82.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 63.
Mostly Clear
Lo 69 °F Hi 86 °F Lo 69 °F Hi 80 °F Lo 56 °F Hi 81 °F Lo 59 °F Hi 82 °F Lo 63 °F

Hazardous Weather Outlook
 

Tonight
 
 Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Low around 69. Southeast wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
 
 Showers and thunderstorms before 8am, then a slight chance of showers between 8am and 9am. Patchy fog between 7am and 8am. High near 86. Calm wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
 
 Partly cloudy, with a low around 69. Calm wind becoming northwest around 6 mph after midnight.
Monday
 
 Mostly sunny, with a high near 80. North wind around 11 mph, with gusts as high as 21 mph.
Monday Night
 
 Mostly clear, with a low around 56. Northeast wind 5 to 7 mph.
Tuesday
 
 Sunny, with a high near 81.
Tuesday Night
 
 Mostly clear, with a low around 59.
Wednesday
 
 Sunny, with a high near 82.
Wednesday Night
 
 Mostly clear, with a low around 63.
Thursday
 
 Sunny, with a high near 85.
Thursday Night
 
 Mostly clear, with a low around 66.
Friday
 
 A chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Friday Night
 
 A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Saturday
 
 A chance of showers. Mostly sunny, with a high near 82. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for McLean VA.