National Weather Service Forecast for: Chillum MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 9:03 am EDT Jun 30, 2026
 
Today

Today: Sunny, with a high near 90. South wind 5 to 9 mph.
Sunny

 Tonight

Tonight: Mostly clear, with a low around 70. South wind 5 to 8 mph.
Mostly Clear

 Wednesday

Wednesday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind around 6 mph. Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 76. South wind around 6 mph.
Mostly Clear

 Thursday

Thursday: Sunny and hot, with a high near 103. Calm wind becoming southwest around 5 mph in the afternoon.
Hot

 Thursday
Night
Thursday Night: Mostly clear, with a low around 80.
Mostly Clear

 Friday

Friday: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 103. Chance of precipitation is 30%.
Sunny then
Chance
T-storms
 Friday
Night
Friday Night: A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 78. Chance of precipitation is 30%.
Chance
T-storms

 Independence
Day
Independence Day: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 102. Chance of precipitation is 40%.
Mostly Sunny
then Chance
T-storms
Hi 90 °F Lo 70 °F Hi 98 °F Lo 76 °F Hi 103 °F Lo 80 °F Hi 103 °F Lo 78 °F Hi 102 °F

Heat Advisory
Extreme Heat Watch
 

Today
 
 Sunny, with a high near 90. South wind 5 to 9 mph.
Tonight
 
 Mostly clear, with a low around 70. South wind 5 to 8 mph.
Wednesday
 
 A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind around 6 mph. Chance of precipitation is 20%.
Wednesday Night
 
 Mostly clear, with a low around 76. South wind around 6 mph.
Thursday
 
 Sunny and hot, with a high near 103. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 80.
Friday
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 103. Chance of precipitation is 30%.
Friday Night
 
 A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 78. Chance of precipitation is 30%.
Independence Day
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 102. Chance of precipitation is 40%.
Saturday Night
 
 A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 76. Chance of precipitation is 40%.
Sunday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 96. Chance of precipitation is 50%.
Sunday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 50%.
Monday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 93. Chance of precipitation is 50%.

 

Forecast from NOAA-NWS for Chillum MD.