National Weather Service Forecast for: Mason City IA
Issued by: National Weather Service Des Moines, IA
Updated: 6:57 am CDT May 29, 2026
 
Today

Today: Partly sunny, with a high near 82. Southeast wind around 7 mph.
Partly Sunny

 Tonight

Tonight: Mostly cloudy, with a low around 58. East southeast wind 3 to 5 mph.
Mostly Cloudy

 Saturday

Saturday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 78. East southeast wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers

 Saturday
Night
Saturday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 55. East southeast wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Slight Chance
T-storms then
Chance
Showers
 Sunday

Sunday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 77. East southeast wind around 14 mph, with gusts as high as 22 mph.
Slight Chance
T-storms

 Sunday
Night
Sunday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 56. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms

 Monday

Monday: Mostly sunny, with a high near 82.
Mostly Sunny

 Monday
Night
Monday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 55. Chance of precipitation is 20%.
Slight Chance
T-storms

 Tuesday

Tuesday: Mostly sunny, with a high near 81.
Mostly Sunny
Hi 82 °F Lo 58 °F Hi 78 °F Lo 55 °F Hi 77 °F Lo 56 °F Hi 82 °F Lo 55 °F Hi 81 °F

Hazardous Weather Outlook
 

Today
 
 Partly sunny, with a high near 82. Southeast wind around 7 mph.
Tonight
 
 Mostly cloudy, with a low around 58. East southeast wind 3 to 5 mph.
Saturday
 
 A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 78. East southeast wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 55. East southeast wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
 
 A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 77. East southeast wind around 14 mph, with gusts as high as 22 mph.
Sunday Night
 
 A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 56. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
 
 Mostly sunny, with a high near 82.
Monday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 55. Chance of precipitation is 20%.
Tuesday
 
 Mostly sunny, with a high near 81.
Tuesday Night
 
 Partly cloudy, with a low around 54.
Wednesday
 
 Mostly sunny, with a high near 82.
Wednesday Night
 
 Partly cloudy, with a low around 56.
Thursday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Mason City IA.