National Weather Service Forecast for: Chillum MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 4:53 pm EDT Jul 16, 2026
 
Tonight

Tonight: Isolated showers and thunderstorms before 10pm. Widespread smoke, mainly between 10pm and 5am. Partly cloudy, with a low around 75. West wind 6 to 11 mph becoming northeast after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Isolated
T-storms then
Smoke
 Friday

Friday: Widespread smoke. Mostly sunny, with a high near 93. North wind around 5 mph becoming calm in the morning.
Smoke

 Friday
Night
Friday Night: A chance of showers and thunderstorms, mainly after 3am. Widespread smoke. Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 30%.
Smoke then
Chance
T-storms
 Saturday

Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Areas of smoke before noon. High near 91. Heat index values as high as 102. South wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Chance
T-storms then
Showers
 Saturday
Night
Saturday Night: Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 74. West wind around 6 mph. Chance of precipitation is 80%.
Showers

 Sunday

Sunday: A chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Chance
Showers then
Slight Chance
T-storms
 Sunday
Night
Sunday Night: Mostly clear, with a low around 69.
Mostly Clear

 Monday

Monday: Mostly sunny, with a high near 87.
Mostly Sunny

 Monday
Night
Monday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Partly Cloudy
then Slight
Chance
Showers
Lo 75 °F Hi 93 °F Lo 74 °F Hi 91 °F Lo 74 °F Hi 89 °F Lo 69 °F Hi 87 °F Lo 71 °F

Air Quality Alert
Hazardous Weather Outlook
Heat Advisory
 

Tonight
 
 Isolated showers and thunderstorms before 10pm. Widespread smoke, mainly between 10pm and 5am. Partly cloudy, with a low around 75. West wind 6 to 11 mph becoming northeast after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Friday
 
 Widespread smoke. Mostly sunny, with a high near 93. North wind around 5 mph becoming calm in the morning.
Friday Night
 
 A chance of showers and thunderstorms, mainly after 3am. Widespread smoke. Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 30%.
Saturday
 
 A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Areas of smoke before noon. High near 91. Heat index values as high as 102. South wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
 
 Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 74. West wind around 6 mph. Chance of precipitation is 80%.
Sunday
 
 A chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Sunday Night
 
 Mostly clear, with a low around 69.
Monday
 
 Mostly sunny, with a high near 87.
Monday Night
 
 A slight chance of showers after 2am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Tuesday
 
 A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 91. Chance of precipitation is 40%.
Tuesday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 50%.
Wednesday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Wednesday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Thursday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Chillum MD.