National Weather Service Forecast for: Riderwood MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 2:22 am EDT Aug 20, 2026
 
Today

Today: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 82. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Scattered
Showers then
Showers

 Tonight

Tonight: Showers and thunderstorms likely before 9pm, then isolated showers between 9pm and 10pm. Patchy fog between 9pm and 2am. Otherwise, mostly cloudy, with a low around 65. North wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely and
Patchy Fog
then Patchy
Fog
 Friday

Friday: Mostly sunny, with a high near 80. North wind around 6 mph becoming east in the afternoon.
Mostly Sunny


 Friday
Night
Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Increasing clouds, with a low around 68. Light east wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Chance
Showers then
Showers
Likely
 Saturday

Saturday: Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 81. Light east wind. Chance of precipitation is 70%.
Showers
Likely

 Saturday
Night
Saturday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Showers
Likely then
Chance
Showers
 Sunday

Sunday: A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Chance
Showers

 Sunday
Night
Sunday Night: A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 64. Chance of precipitation is 30%.
Chance
Showers then
Mostly Clear

 Monday

Monday: Sunny, with a high near 80.
Sunny
Hi 82 °F Lo 65 °F Hi 80 °F Lo 68 °F Hi 81 °F Lo 67 °F Hi 82 °F Lo 64 °F Hi 80 °F

Hazardous Weather Outlook
 

Today
 
 Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 82. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
 Showers and thunderstorms likely before 9pm, then isolated showers between 9pm and 10pm. Patchy fog between 9pm and 2am. Otherwise, mostly cloudy, with a low around 65. North wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
 
 Mostly sunny, with a high near 80. North wind around 6 mph becoming east in the afternoon.
Friday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Increasing clouds, with a low around 68. Light east wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
 
 Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 81. Light east wind. Chance of precipitation is 70%.
Saturday Night
 
 Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Sunday
 
 A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Sunday Night
 
 A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 64. Chance of precipitation is 30%.
Monday
 
 Sunny, with a high near 80.
Monday Night
 
 Mostly clear, with a low around 63.
Tuesday
 
 Sunny, with a high near 81.
Tuesday Night
 
 Partly cloudy, with a low around 65.
Wednesday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Riderwood MD.