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February 15th, 2026 :: 1:34 am CST   

Local Weather Report for
Altamont
Illinois, United States

 Altamont Weather Forecast Summary  
 
Today
Feb 15th
Monday
Feb 16th
Tuesday
Feb 17th
Wednesday
Feb 18th
Thursday
Feb 19th
Showers Cloudy Cloudy Cloudy Cloudy
59°F
62°F
43°F
60°F
46°F
68°F
52°F
72°F
49°F
 
 Altamont Detailed Weather Forecast  
 
Sunday, February 15th, 2026
Overnight Temperature: 46°F
Cloudy with showers likely. Windy at times.
Morning Temperature: 53°F
Sunny. Windy at times.
Afternoon Temperature: 52°F
Sunny.
Evening Temperature: 48°F
Clear.
Monday, February 16th, 2026
Overnight Temperature: 44°F
Cloudy.
Morning Temperature: 56°F
Cloudy. Windy at times.
Afternoon Temperature: 54°F
Cloudy.
Evening Temperature: 49°F
Cloudy.
Tuesday, February 17th, 2026
Overnight Temperature: 46°F
Cloudy.
Morning Temperature: 55°F
Cloudy. Windy.
Afternoon Temperature: 59°F
Cloudy. Windy.
Evening Temperature: 58°F
Cloudy. Windy.
Wednesday, February 18th, 2026
Overnight Temperature: 58°F
Cloudy. Windy.
Morning Temperature: 65°F
Sunny with a slight chance of showers. Windy at times.
Afternoon Temperature: 58°F
Sunny.
Evening Temperature: 54°F
Cloudy.
Thursday, February 19th, 2026
Overnight Temperature: 49°F
Clear.
Morning Temperature: 64°F
Mostly sunny. Slight chance of a thunderstorm. Windy.
Afternoon Temperature: 61°F
Cloudy. Windy.
Evening Temperature: 53°F
Cloudy. Wind 20 to 30 mph.
Friday, February 20th, 2026
Overnight Temperature: 39°F
Cloudy. Windy.
Morning Temperature: 42°F
Cloudy. Windy at times.
Afternoon Temperature: 43°F
Mostly cloudy.
Evening Temperature: 40°F
Cloudy.
Saturday, February 21st, 2026
Overnight Temperature: 33°F
Cloudy.
Morning Temperature: 43°F
Sunny with cloudy periods.
Afternoon Temperature: 43°F
Mostly cloudy.
Evening Temperature: 40°F
Cloudy.
Sunday, February 22nd, 2026
Overnight Temperature: 35°F
Clear with cloudy periods.
Morning Temperature: 37°F
Sunny with cloudy periods. Windy.
Afternoon Temperature: 34°F
Sunny. Windy at times.
Evening Temperature: 28°F
Clear. Windy at times.
Monday, February 23rd, 2026
Overnight Temperature: 23°F
Clear. Windy at times.
Morning Temperature: 32°F
Sunny. Windy at times.
Afternoon Temperature: 30°F
Sunny.
Evening Temperature: 27°F
Clear.





 

  [ Local Weather Report ]
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11:55 PM  45°F
moderate rain
 
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11:55 PM  45°F
moderate rain
 
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11:55 PM  45°F
moderate rain
 
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Bellefontaine Neighbors, MO 
 
Calverton Park, MO 

 
This WeatherCity Weather Forecast for Altamont, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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