National Weather Service Forecast for: Spencer IA
Issued by: National Weather Service Sioux Falls, SD
Updated: 6:38 pm CST Dec 18, 2025
 
Tonight

Tonight: Cloudy during the early evening, then gradual clearing, with a low around 2. Windy, with a northwest wind 20 to 30 mph decreasing to 5 to 15 mph. Winds could gust as high as 55 mph.
Gradual
Clearing and
Windy
 Friday

Friday: Mostly sunny, with a high near 28. West southwest wind 5 to 10 mph becoming south 10 to 15 mph in the morning. Winds could gust as high as 30 mph.
Mostly Sunny

 Friday
Night
Friday Night: Mostly cloudy, with a low around 23. South wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Mostly Cloudy

 Saturday

Saturday: Mostly sunny, with a high near 33. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 11. West northwest wind 5 to 10 mph.
Mostly Clear

 Sunday

Sunday: Mostly sunny, with a high near 32. West southwest wind 5 to 10 mph becoming south southeast in the morning. Winds could gust as high as 20 mph.
Mostly Sunny

 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 25.
Mostly Cloudy

 Monday

Monday: Mostly sunny, with a high near 43.
Mostly Sunny

 Monday
Night
Monday Night: Partly cloudy, with a low around 28.
Partly Cloudy
Lo 2 °F Hi 28 °F Lo 23 °F Hi 33 °F Lo 11 °F Hi 32 °F Lo 25 °F Hi 43 °F Lo 28 °F

Hazardous Weather Outlook
Wind Advisory
 

Tonight
 
 Cloudy during the early evening, then gradual clearing, with a low around 2. Windy, with a northwest wind 20 to 30 mph decreasing to 5 to 15 mph. Winds could gust as high as 55 mph.
Friday
 
 Mostly sunny, with a high near 28. West southwest wind 5 to 10 mph becoming south 10 to 15 mph in the morning. Winds could gust as high as 30 mph.
Friday Night
 
 Mostly cloudy, with a low around 23. South wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Saturday
 
 Mostly sunny, with a high near 33. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
 
 Mostly clear, with a low around 11. West northwest wind 5 to 10 mph.
Sunday
 
 Mostly sunny, with a high near 32. West southwest wind 5 to 10 mph becoming south southeast in the morning. Winds could gust as high as 20 mph.
Sunday Night
 
 Mostly cloudy, with a low around 25.
Monday
 
 Mostly sunny, with a high near 43.
Monday Night
 
 Partly cloudy, with a low around 28.
Tuesday
 
 Partly sunny, with a high near 40.
Tuesday Night
 
 Mostly cloudy, with a low around 25.
Wednesday
 
 Mostly cloudy, with a high near 42.
Wednesday Night
 
 Mostly cloudy, with a low around 30.
Christmas Day
 
 Partly sunny, with a high near 42.

 

Forecast from NOAA-NWS for Spencer IA.