National Weather Service Forecast for: Waterloo IA
Issued by: National Weather Service Des Moines, IA
Updated: 6:42 pm CDT May 28, 2026
 
Tonight

Tonight: Mostly cloudy, with a low around 59. East southeast wind 6 to 8 mph.
Mostly Cloudy

 Friday

Friday: Partly sunny, with a high near 82. East southeast wind 5 to 7 mph.
Partly Sunny

 Friday
Night
Friday Night: Mostly cloudy, with a low around 61. East southeast wind 3 to 6 mph.
Mostly Cloudy

 Saturday

Saturday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 81. East southeast wind 6 to 13 mph, with gusts as high as 22 mph.
Mostly Cloudy
then Slight
Chance
Showers
 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 57. East southeast wind 11 to 13 mph, with gusts as high as 20 mph.
Mostly Cloudy

 Sunday

Sunday: Partly sunny, with a high near 81.
Partly Sunny

 Sunday
Night
Sunday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Slight Chance
T-storms then
Chance
Showers
 Monday

Monday: Mostly sunny, with a high near 85.
Mostly Sunny

 Monday
Night
Monday Night: Partly cloudy, with a low around 57.
Partly Cloudy
Lo 59 °F Hi 82 °F Lo 61 °F Hi 81 °F Lo 57 °F Hi 81 °F Lo 58 °F Hi 85 °F Lo 57 °F

 

Tonight
 
 Mostly cloudy, with a low around 59. East southeast wind 6 to 8 mph.
Friday
 
 Partly sunny, with a high near 82. East southeast wind 5 to 7 mph.
Friday Night
 
 Mostly cloudy, with a low around 61. East southeast wind 3 to 6 mph.
Saturday
 
 A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 81. East southeast wind 6 to 13 mph, with gusts as high as 22 mph.
Saturday Night
 
 Mostly cloudy, with a low around 57. East southeast wind 11 to 13 mph, with gusts as high as 20 mph.
Sunday
 
 Partly sunny, with a high near 81.
Sunday Night
 
 A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Monday
 
 Mostly sunny, with a high near 85.
Monday Night
 
 Partly cloudy, with a low around 57.
Tuesday
 
 Mostly sunny, with a high near 84.
Tuesday Night
 
 Mostly clear, with a low around 55.
Wednesday
 
 Sunny, with a high near 84.
Wednesday Night
 
 Partly cloudy, with a low around 58.
Thursday
 
 Mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Waterloo IA.