National Weather Service Forecast for: Catonsville MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 10:53 pm EDT Sep 12, 2026
 
Overnight

Overnight: Showers and possibly a thunderstorm. Patchy fog after 5am. Low around 69. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers and
Patchy Fog

 Sunday

Sunday: Showers and possibly a thunderstorm before 8am, then a chance of showers between 8am and 9am. Patchy fog before 8am. High near 85. Calm wind becoming west around 6 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 67. Calm wind becoming northwest 5 to 7 mph after midnight.
Partly Cloudy

 Monday

Monday: Mostly sunny, with a high near 77. North wind around 11 mph, with gusts as high as 21 mph.
Mostly Sunny

 Monday
Night
Monday Night: Mostly clear, with a low around 55. North wind around 7 mph.
Mostly Clear

 Tuesday

Tuesday: Sunny, with a high near 78.
Sunny

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

 Wednesday

Wednesday: Sunny, with a high near 80.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 63.
Mostly Clear
Lo 69 °F Hi 85 °F Lo 67 °F Hi 77 °F Lo 55 °F Hi 78 °F Lo 59 °F Hi 80 °F Lo 63 °F

Hazardous Weather Outlook
 

Overnight
 
 Showers and possibly a thunderstorm. Patchy fog after 5am. Low around 69. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
 
 Showers and possibly a thunderstorm before 8am, then a chance of showers between 8am and 9am. Patchy fog before 8am. High near 85. Calm wind becoming west around 6 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 67. Calm wind becoming northwest 5 to 7 mph after midnight.
Monday
 
 Mostly sunny, with a high near 77. North wind around 11 mph, with gusts as high as 21 mph.
Monday Night
 
 Mostly clear, with a low around 55. North wind around 7 mph.
Tuesday
 
 Sunny, with a high near 78.
Tuesday Night
 
 Mostly clear, with a low around 59.
Wednesday
 
 Sunny, with a high near 80.
Wednesday Night
 
 Mostly clear, with a low around 63.
Thursday
 
 Sunny, with a high near 83.
Thursday Night
 
 Mostly clear, with a low around 65.
Friday
 
 A chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 40%.
Friday Night
 
 A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Saturday
 
 A slight chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Catonsville MD.