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Old Princeton, Illinois Weather Forecast
Old Princeton, Illinois Weather
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Weather Forecast for Old Princeton, Illinois : Cass County
Issued: 4:57 am CST Dec 7, 2025 Latitude: 39.8781037 Longitude: -90.1640075 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Mostly Cloudy on Today Mostly Cloudy on Tonight Mostly Sunny on Monday Partly Sunny on Tuesday Mostly Cloudy on Wednesday 30% chance of snow on Thursday Partly Sunny on Friday Partly Sunny on Saturday
High: 26 °F Low: 14°F High: 29°F High: 44°F High: 41°F High: 31°F High: 19°F High: 15°F
Low: 19°F Low: 37°F Low: 22°F Low: 10°F Low: 2°F  
Mostly Cloudy Mostly Cloudy Mostly Sunny Partly Sunny Mostly Cloudy Snow Partly Sunny Partly Sunny
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Current Conditions at
JACKSONVILLE MUNICIPAL - (KIJX)
34°
Cloudy
as of 7:15 AM CST
Rel. Humidity: 100%
Dew Point: 34°F
Visibility: 3 Miles
Pressure: 29.96 in.
Flight Rule: MVFR
Wind Data
3 MPH
020° North
Cloud Level(s): Scattered at 900ft, Solid Overcast at 1900ft
Current Conditions at
SPRINGFIELD - (KSPI)
36°
Cloudy
Mist
as of 6:59 AM CST
Rel. Humidity: 93%
Dew Point: 34°F
Visibility: 5 Miles
Pressure: 29.95 in.
Flight Rule: MVFR
Wind Data
5 MPH
240° Southwest
Cloud Level(s): Few at 600ft, Broken at 2600ft, Solid Overcast at 3300ft
Current Conditions at
LOGAN COUNTY AIRPORT - (KAAA)
36°
Cloudy
Mist
as of 7:15 AM CST
Rel. Humidity: 93%
Dew Point: 34°F
Visibility: 2 1/2 Miles
Pressure: 29.98 in.
Flight Rule: LIFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 400ft
Mostly Cloudy on Today Today... Mostly cloudy, with a temperature falling to around 26 by 5pm. North wind 6 to 16 mph, with gusts as high as 25 mph.

Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 14. North wind 8 to 13 mph becoming light after midnight. Winds could gust as high as 20 mph.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 29. Calm wind becoming south around 5 mph in the afternoon.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 19. South wind 6 to 14 mph, with gusts as high as 24 mph.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 44. Southwest wind 11 to 14 mph, with gusts as high as 23 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 37. South southwest wind 14 to 18 mph becoming west after midnight. Winds could gust as high as 31 mph.

Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 41. West northwest wind 10 to 18 mph, with gusts as high as 29 mph.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 22.

30% chance of snow Thursday Thursday... A 30 percent chance of snow. Mostly cloudy, with a high near 31.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 10.

Partly Sunny on Friday Friday... Partly sunny, with a high near 19.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 2.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 15.

Current Radar Image


Sun Almanac for Old Princeton, Illinois
Sunrise: 07:09 AM
Sunset: 4:36 PM
Civil Sunrise:06:39 AM
Civil Sunset: 5:06 PM
Nautical Sunrise: 06:05 AM
Nautical Sunset: 5:40 PM
Astro Sunrise: 05:32 AM
Astro Sunset: 6:12 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.