National Weather Service Forecast for: Alton AL
Issued by: National Weather Service Birmingham, AL
Updated: 5:52 pm CDT Jun 18, 2026
 
Tonight

Tonight: A 20 percent chance of showers before 4am.  Mostly cloudy, with a low around 70. West wind around 5 mph becoming calm  after midnight.
Slight Chance
Showers

Juneteenth

Juneteenth: A chance of showers between 7am and 10am, then a chance of showers and thunderstorms after 10am.  Partly sunny, with a high near 85. Calm wind becoming northwest around 5 mph in the afternoon.  Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Chance
T-storms
Friday
Night
Friday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 67. Calm wind.
Mostly Cloudy
then Slight
Chance
T-storms
Saturday

Saturday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 84. Calm wind.
Chance
T-storms

Saturday
Night
Saturday Night: A 30 percent chance of showers after 1am.  Mostly cloudy, with a low around 68. Calm wind.
Mostly Cloudy
then Chance
Showers
Sunday

Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm.  High near 85. Chance of precipitation is 80%.
Chance
Showers then
T-storms
Sunday
Night
Sunday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 72.
Chance
T-storms

Monday

Monday: Showers and thunderstorms likely, mainly after 1pm.  Partly sunny, with a high near 87. Chance of precipitation is 60%.
Slight Chance
T-storms then
T-storms
Likely
Monday
Night
Monday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Showers
Likely

Lo 70 °F Hi 85 °F Lo 67 °F Hi 84 °F Lo 68 °F Hi 85 °F Lo 72 °F Hi 87 °F Lo 70 °F

Flood Watch
 

Tonight
 
A 20 percent chance of showers before 4am. Mostly cloudy, with a low around 70. West wind around 5 mph becoming calm after midnight.
Juneteenth
 
A chance of showers between 7am and 10am, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 85. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. Calm wind.
Saturday
 
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84. Calm wind.
Saturday Night
 
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 68. Calm wind.
Sunday
 
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 85. Chance of precipitation is 80%.
Sunday Night
 
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Monday
 
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Monday Night
 
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Tuesday
 
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Tuesday Night
 
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Wednesday
 
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Wednesday Night
 
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Thursday
 
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Alton AL.