National Weather Service Forecast for: Marion IA
Issued by: National Weather Service Quad Cities, IA/IL
Updated: 8:11 pm CDT Jul 16, 2026
 
Tonight

Tonight: Mostly clear, with a low around 71. Calm wind.
Mostly Clear

 Friday

Friday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Sunny, with a high near 92. Light south wind becoming west 5 to 10 mph in the morning.
Sunny then
Chance
T-storms
 Friday
Night
Friday Night: A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 73. Southwest wind around 5 mph.
Slight Chance
T-storms then
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 92. Heat index values as high as 100. Northwest wind 5 to 10 mph.
Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 67.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 88.
Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 69.
Partly Cloudy

 Monday

Monday: A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 93.
Chance
T-storms
 Monday
Night
Monday Night: Partly cloudy, with a low around 71.
Partly Cloudy
Lo 71 °F Hi 92 °F Lo 73 °F Hi 92 °F Lo 67 °F Hi 88 °F Lo 69 °F Hi 93 °F Lo 71 °F

Hazardous Weather Outlook
 

Tonight
 
 Mostly clear, with a low around 71. Calm wind.
Friday
 
 A 30 percent chance of showers and thunderstorms, mainly after 5pm. Sunny, with a high near 92. Light south wind becoming west 5 to 10 mph in the morning.
Friday Night
 
 A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 73. Southwest wind around 5 mph.
Saturday
 
 Sunny, with a high near 92. Heat index values as high as 100. Northwest wind 5 to 10 mph.
Saturday Night
 
 Mostly clear, with a low around 67.
Sunday
 
 Sunny, with a high near 88.
Sunday Night
 
 Partly cloudy, with a low around 69.
Monday
 
 A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 93.
Monday Night
 
 Partly cloudy, with a low around 71.
Tuesday
 
 Sunny, with a high near 86.
Tuesday Night
 
 Mostly clear, with a low around 61.
Wednesday
 
 Sunny, with a high near 81.
Wednesday Night
 
 Partly cloudy, with a low around 60.
Thursday
 
 Sunny, with a high near 81.

 

Forecast from NOAA-NWS for Marion IA.