National Weather Service Forecast for: Waterloo IA
Issued by: National Weather Service Des Moines, IA
Updated: 10:47 pm CST Dec 5, 2025
 
Overnight

Overnight: Mostly cloudy, with a low around 14. Northwest wind 6 to 10 mph.
Mostly Cloudy

 Saturday

Saturday: A 50 percent chance of snow, mainly after 4pm. Mostly cloudy, with a high near 22. Wind chill values as low as 10. Calm wind becoming east 5 to 7 mph in the afternoon. New snow accumulation of less than a half inch possible.
Partly Sunny
then Chance
Snow
 Saturday
Night
Saturday Night: Snow, mainly before 5am. The snow could be heavy at times. Low around 13. Wind chill values as low as 5. East wind 8 to 13 mph becoming north after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Heavy Snow

 Sunday

Sunday: Mostly sunny, with a temperature falling to around 9 by 5pm. Wind chill values as low as zero. North wind 7 to 10 mph, with gusts as high as 21 mph.
Mostly Sunny

 Sunday
Night
Sunday Night: Mostly cloudy, with a low around -3. North wind around 6 mph becoming calm in the evening.
Mostly Cloudy

 Monday

Monday: Partly sunny, with a high near 22.
Partly Sunny

 Monday
Night
Monday Night: Mostly cloudy, with a low around 13.
Mostly Cloudy

 Tuesday

Tuesday: Mostly cloudy, with a high near 38.
Mostly Cloudy

 Tuesday
Night
Tuesday Night: A 40 percent chance of rain before midnight. Cloudy, with a low around 25. Breezy.
Chance Rain
then Mostly
Cloudy and
Breezy
Lo 14 °F Hi 22 °F Lo 13 °F Hi 16 °F⇓ Lo -3 °F Hi 22 °F Lo 13 °F Hi 38 °F Lo 25 °F

Winter Storm Warning
 

Overnight
 
 Mostly cloudy, with a low around 14. Northwest wind 6 to 10 mph.
Saturday
 
 A 50 percent chance of snow, mainly after 4pm. Mostly cloudy, with a high near 22. Wind chill values as low as 10. Calm wind becoming east 5 to 7 mph in the afternoon. New snow accumulation of less than a half inch possible.
Saturday Night
 
 Snow, mainly before 5am. The snow could be heavy at times. Low around 13. Wind chill values as low as 5. East wind 8 to 13 mph becoming north after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Sunday
 
 Mostly sunny, with a temperature falling to around 9 by 5pm. Wind chill values as low as zero. North wind 7 to 10 mph, with gusts as high as 21 mph.
Sunday Night
 
 Mostly cloudy, with a low around -3. North wind around 6 mph becoming calm in the evening.
Monday
 
 Partly sunny, with a high near 22.
Monday Night
 
 Mostly cloudy, with a low around 13.
Tuesday
 
 Mostly cloudy, with a high near 38.
Tuesday Night
 
 A 40 percent chance of rain before midnight. Cloudy, with a low around 25. Breezy.
Wednesday
 
 Mostly cloudy, with a high near 31. Blustery.
Wednesday Night
 
 Mostly cloudy, with a low around 14.
Thursday
 
 Mostly cloudy, with a high near 24.
Thursday Night
 
 Mostly cloudy, with a low around 7.
Friday
 
 Partly sunny, with a high near 16.

 

Forecast from NOAA-NWS for Waterloo IA.