National Weather Service Forecast for: Johnston IA
Issued by: National Weather Service Des Moines, IA
Updated: 8:38 am CDT Jun 10, 2025
 
Today

Today: Areas of smoke before noon. Sunny, with a high near 84. West wind 5 to 9 mph.
Areas Smoke
then Sunny

 Tonight

Tonight: Mostly clear, with a low around 61. South southwest wind around 8 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 92. South southwest wind 6 to 9 mph.
Sunny

 Wednesday
Night
Wednesday Night: Showers and thunderstorms likely, mainly between 7pm and 1am. Mostly cloudy, with a low around 65. Southwest wind 5 to 8 mph becoming east in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
T-storms
Likely

 Thursday

Thursday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind 5 to 9 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Chance
T-storms
 Thursday
Night
Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. New rainfall amounts between a quarter and half of an inch possible.
Chance
T-storms

 Friday

Friday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Chance
T-storms

 Friday
Night
Friday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 65.
Chance
T-storms

 Saturday

Saturday: Partly sunny, with a high near 85.
Partly Sunny
Hi 84 °F Lo 61 °F Hi 92 °F Lo 65 °F Hi 86 °F Lo 66 °F Hi 83 °F Lo 65 °F Hi 85 °F

 

Today
 
 Areas of smoke before noon. Sunny, with a high near 84. West wind 5 to 9 mph.
Tonight
 
 Mostly clear, with a low around 61. South southwest wind around 8 mph.
Wednesday
 
 Sunny, with a high near 92. South southwest wind 6 to 9 mph.
Wednesday Night
 
 Showers and thunderstorms likely, mainly between 7pm and 1am. Mostly cloudy, with a low around 65. Southwest wind 5 to 8 mph becoming east in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind 5 to 9 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. New rainfall amounts between a quarter and half of an inch possible.
Friday
 
 A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Friday Night
 
 A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 65.
Saturday
 
 Partly sunny, with a high near 85.
Saturday Night
 
 Mostly cloudy, with a low around 66.
Sunday
 
 Partly sunny, with a high near 87.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Monday
 
 Partly sunny, with a high near 89.

 

Forecast from NOAA-NWS for Johnston IA.