National Weather Service Forecast for: Altoona IA
Issued by: National Weather Service Des Moines, IA
Updated: 3:16 am CST Dec 18, 2025
 
Overnight

Overnight: Rain. Steady temperature around 45. South southwest wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.
Rain

 Thursday

Thursday: Rain before 9am, then a slight chance of snow showers after 2pm. Temperature falling to around 21 by 5pm. Wind chill values as low as 5. Windy, with a west northwest wind 16 to 21 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Windy. Rain
then Isolated
Snow Showers
 Thursday
Night
Thursday Night: Isolated snow showers before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 12. Wind chill values as low as zero. Windy, with a northwest wind 23 to 28 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 20%.
Isolated Snow
Showers and
Windy
 Friday

Friday: Sunny, with a high near 35. Wind chill values as low as zero. West northwest wind 6 to 14 mph becoming south southeast in the afternoon. Winds could gust as high as 23 mph.
Sunny

 Friday
Night
Friday Night: Mostly cloudy, with a low around 29. South wind 10 to 13 mph, with gusts as high as 22 mph.
Mostly Cloudy

 Saturday

Saturday: Mostly sunny, with a high near 39.
Mostly Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 20.
Mostly Clear

 Sunday

Sunday: Mostly sunny, with a high near 35.
Mostly Sunny

 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 28.
Mostly Cloudy
Lo 45 °F Hi 40 °F⇓ Lo 12 °F Hi 35 °F Lo 29 °F Hi 39 °F Lo 20 °F Hi 35 °F Lo 28 °F

Wind Advisory
 

Overnight
 
 Rain. Steady temperature around 45. South southwest wind 10 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
 
 Rain before 9am, then a slight chance of snow showers after 2pm. Temperature falling to around 21 by 5pm. Wind chill values as low as 5. Windy, with a west northwest wind 16 to 21 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
 
 Isolated snow showers before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 12. Wind chill values as low as zero. Windy, with a northwest wind 23 to 28 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 20%.
Friday
 
 Sunny, with a high near 35. Wind chill values as low as zero. West northwest wind 6 to 14 mph becoming south southeast in the afternoon. Winds could gust as high as 23 mph.
Friday Night
 
 Mostly cloudy, with a low around 29. South wind 10 to 13 mph, with gusts as high as 22 mph.
Saturday
 
 Mostly sunny, with a high near 39.
Saturday Night
 
 Mostly clear, with a low around 20.
Sunday
 
 Mostly sunny, with a high near 35.
Sunday Night
 
 Mostly cloudy, with a low around 28.
Monday
 
 Partly sunny, with a high near 45.
Monday Night
 
 Partly cloudy, with a low around 33.
Tuesday
 
 Mostly sunny, with a high near 46.
Tuesday Night
 
 Mostly cloudy, with a low around 30.
Wednesday
 
 Mostly cloudy, with a high near 44.

 

Forecast from NOAA-NWS for Altoona IA.