National Weather Service Forecast for: Newton IA
Issued by: National Weather Service Des Moines, IA
Updated: 8:07 pm CDT Jun 18, 2026
 
Tonight

Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, then gradually becoming clear, with a low around 54. West northwest wind 3 to 5 mph.
Slight Chance
T-storms then
Clear
 Juneteenth

Juneteenth: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 79. Calm wind becoming west 5 to 7 mph in the afternoon.
Sunny then
Slight Chance
T-storms
 Friday
Night
Friday Night: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 59. North wind around 6 mph becoming light and variable in the evening.
Slight Chance
T-storms

 Saturday

Saturday: Sunny, with a high near 81. Light north wind.
Sunny

 Saturday
Night
Saturday Night: Showers likely, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 60. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Slight Chance
Showers then
Showers
Likely
 Sunday

Sunday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 72. Breezy. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Heavy Rain
and Breezy

 Sunday
Night
Sunday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 56. Breezy.
Chance
Showers and
Breezy
 Monday

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

 Monday
Night
Monday Night: Partly cloudy, with a low around 55.
Partly Cloudy
Lo 54 °F Hi 79 °F Lo 59 °F Hi 81 °F Lo 60 °F Hi 72 °F Lo 56 °F Hi 75 °F Lo 55 °F

Hazardous Weather Outlook
 

Tonight
 
 A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, then gradually becoming clear, with a low around 54. West northwest wind 3 to 5 mph.
Juneteenth
 
 A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 79. Calm wind becoming west 5 to 7 mph in the afternoon.
Friday Night
 
 A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 59. North wind around 6 mph becoming light and variable in the evening.
Saturday
 
 Sunny, with a high near 81. Light north wind.
Saturday Night
 
 Showers likely, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 60. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 72. Breezy. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Sunday Night
 
 A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 56. Breezy.
Monday
 
 Mostly sunny, with a high near 75.
Monday Night
 
 Partly cloudy, with a low around 55.
Tuesday
 
 Mostly sunny, with a high near 78.
Tuesday Night
 
 Partly cloudy, with a low around 58.
Wednesday
 
 Mostly sunny, with a high near 79.
Wednesday Night
 
 Mostly clear, with a low around 57.
Thursday
 
 Mostly sunny, with a high near 79.

 

Forecast from NOAA-NWS for Newton IA.