National Weather Service Forecast for: Marion IA
Issued by: National Weather Service Quad Cities, IA/IL
Updated: 7:56 pm CDT Jun 29, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.
Partly Cloudy

 Tuesday

Tuesday: Sunny and hot, with a high near 95. Heat index values as high as 106. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Hot

 Tuesday
Night
Tuesday Night: A slight chance of showers between 2am and 3am. Partly cloudy, with a low around 75. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Partly Cloudy
then Slight
Chance
Showers
 Wednesday

Wednesday: Sunny and hot, with a high near 95. Heat index values as high as 101. South wind 10 to 15 mph, with gusts as high as 25 mph.
Hot

 Wednesday
Night
Wednesday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.
Mostly Clear
then Chance
T-storms
 Thursday

Thursday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Chance
T-storms then
Chance
Showers
 Thursday
Night
Thursday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.
Partly Cloudy
then Chance
T-storms
 Friday

Friday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Chance
Showers then
Chance
T-storms
 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71.
Chance
T-storms
Lo 77 °F Hi 95 °F Lo 75 °F Hi 95 °F Lo 76 °F Hi 93 °F Lo 73 °F Hi 91 °F Lo 71 °F

Hazardous Weather Outlook
Extreme Heat Warning
 

Tonight
 
 Partly cloudy, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
 
 Sunny and hot, with a high near 95. Heat index values as high as 106. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
 
 A slight chance of showers between 2am and 3am. Partly cloudy, with a low around 75. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
 
 Sunny and hot, with a high near 95. Heat index values as high as 101. South wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
 
 A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.
Thursday
 
 A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.
Friday
 
 A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Friday Night
 
 A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71.
Independence Day
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Saturday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Sunday Night
 
 Partly cloudy, with a low around 67.
Monday
 
 Mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Marion IA.