National Weather Service Forecast for: Mason City IA
Issued by: National Weather Service Des Moines, IA
Updated: 5:17 am CDT Jun 22, 2026
 
Today

Today: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 77. Calm wind becoming northeast around 6 mph in the morning.
Patchy Fog
then Mostly
Sunny
 Tonight

Tonight: Partly cloudy, with a low around 54. Northeast wind around 6 mph becoming calm in the evening.
Partly Cloudy

 Tuesday

Tuesday: A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers after 5pm. Partly sunny, with a high near 78. Light south southeast wind becoming south southwest 5 to 10 mph in the morning. Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
 Tuesday
Night
Tuesday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 59. South southwest wind 6 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely

 Wednesday

Wednesday: A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 79. West northwest wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 10%.
Slight Chance
T-storms then
Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 54.
Partly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 75.
Mostly Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 53.
Mostly Clear

 Friday

Friday: Mostly sunny, with a high near 77.
Mostly Sunny
Hi 77 °F Lo 54 °F Hi 78 °F Lo 59 °F Hi 79 °F Lo 54 °F Hi 75 °F Lo 53 °F Hi 77 °F

 

Today
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 77. Calm wind becoming northeast around 6 mph in the morning.
Tonight
 
 Partly cloudy, with a low around 54. Northeast wind around 6 mph becoming calm in the evening.
Tuesday
 
 A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers after 5pm. Partly sunny, with a high near 78. Light south southeast wind becoming south southwest 5 to 10 mph in the morning. Chance of precipitation is 20%.
Tuesday Night
 
 A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 59. South southwest wind 6 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
 
 A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 79. West northwest wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 10%.
Wednesday Night
 
 Partly cloudy, with a low around 54.
Thursday
 
 Mostly sunny, with a high near 75.
Thursday Night
 
 Mostly clear, with a low around 53.
Friday
 
 Mostly sunny, with a high near 77.
Friday Night
 
 Mostly cloudy, with a low around 58.
Saturday
 
 Mostly sunny, with a high near 81. Breezy.
Saturday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Breezy.
Sunday
 
 Mostly sunny, with a high near 87. Windy.

 

Forecast from NOAA-NWS for Mason City IA.