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

Today: Mostly cloudy, with a high near 81. East southeast wind 7 to 9 mph.
Mostly Cloudy

 Tonight

Tonight: A chance of showers, with thunderstorms also possible after 4am. Cloudy, with a low around 62. East wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers

 Saturday

Saturday: A 40 percent chance of showers and thunderstorms, mainly after 11am. Mostly cloudy, with a high near 77. East southeast wind 9 to 15 mph, with gusts as high as 24 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Chance
T-storms
 Saturday
Night
Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 60. East wind 11 to 14 mph, with gusts as high as 23 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Chance
Showers
 Sunday

Sunday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. East southeast wind around 14 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Chance
T-storms
 Sunday
Night
Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms

 Monday

Monday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Slight Chance
T-storms

 Monday
Night
Monday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Slight Chance
T-storms

 Tuesday

Tuesday: Mostly sunny, with a high near 81.
Mostly Sunny
Hi 81 °F Lo 62 °F Hi 77 °F Lo 60 °F Hi 79 °F Lo 61 °F Hi 83 °F Lo 60 °F Hi 81 °F

Hazardous Weather Outlook
 

Today
 
 Mostly cloudy, with a high near 81. East southeast wind 7 to 9 mph.
Tonight
 
 A chance of showers, with thunderstorms also possible after 4am. Cloudy, with a low around 62. East wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
 
 A 40 percent chance of showers and thunderstorms, mainly after 11am. Mostly cloudy, with a high near 77. East southeast wind 9 to 15 mph, with gusts as high as 24 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 60. East wind 11 to 14 mph, with gusts as high as 23 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
 
 A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. East southeast wind around 14 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
 
 A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Monday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Tuesday
 
 Mostly sunny, with a high near 81.
Tuesday Night
 
 Partly cloudy, with a low around 58.
Wednesday
 
 Mostly sunny, with a high near 82.
Wednesday Night
 
 Partly cloudy, with a low around 59.
Thursday
 
 Partly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Altoona IA.