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Jamestown, Illinois Weather Forecast
Jamestown, Illinois Weather
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Weather Forecast for Jamestown, Illinois : Perry County
Issued: 10:56 am CST Dec 7, 2025 Latitude: 38.0497734 Longitude: -89.5292607 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Monday Tuesday Wednesday Thursday Friday Saturday
10% chance of on This Afternoon Cloudy on Tonight Mostly Cloudy on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday 20% chance of rain & snow on Thursday Mostly Sunny on Friday Mostly Sunny on Saturday
High: 45°F Low: 24°F High: 36°F High: 50°F High: 51°F High: 39°F High: 27°F High: 24°F
Low: 26°F Low: 41°F Low: 29°F Low: 19°F Low: 8 °F  
Increasing Clouds Cloudy Mostly Cloudy Mostly Sunny Partly Sunny Rain & Snow Mostly Sunny Mostly Sunny
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Current Conditions at
SPARTA - (KSAR)
45°
Cloudy
as of 11:35 AM CST
Rel. Humidity: 81%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: MVFR
Wind Data
8 MPH
320° Northwest
Cloud Level(s): Solid Overcast at 1700ft
Current Conditions at
CARBONDALE - (KMDH)
46°
Cloudy
Haze
as of 10:52 AM CST
Rel. Humidity: 70%
Dew Point: 37°F
Visibility: 6 Miles
Pressure: 30.04 in.
Flight Rule: MVFR
Wind Data
8 MPH
320° Northwest
Cloud Level(s): Few at 2000ft, Broken at 2500ft, Solid Overcast at 5000ft
Current Conditions at
CAIRO - (KCIR)
43°
Cloudy
as of 11:35 AM CST
Rel. Humidity: 86%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 3700ft
10% chance of This Afternoon This Afternoon... A slight chance of drizzle before 5pm. Increasing clouds, with a high near 45. North wind 8 to 11 mph.
Cloudy on Tonight Tonight... Cloudy, with a low around 24. North wind 7 to 11 mph.
Mostly Cloudy on Monday Monday... Mostly cloudy, then gradually becoming sunny, with a high near 36. North wind 5 to 7 mph becoming calm in the afternoon.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 26. Light south southeast wind becoming south southwest 6 to 11 mph after midnight. Winds could gust as high as 20 mph.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 50. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 41. South southwest wind around 16 mph, with gusts as high as 25 mph.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 51. West southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
10% chance of rain & snow Wednesday Night Wednesday Night... A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 29. Northwest wind around 6 mph becoming light and variable.
20% chance of rain & snow Thursday Thursday... A chance of rain and snow, mainly before noon. Mostly cloudy, with a high near 39. East wind 6 to 8 mph becoming north in the afternoon.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 19. North northwest wind 6 to 10 mph.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 27. Northwest wind 10 to 13 mph, with gusts as high as 18 mph.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 8. Northwest wind around 10 mph.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 24. West northwest wind 7 to 9 mph.
Current Radar Image


Sun Almanac for Jamestown, Illinois
Sunrise: 07:01 AM
Sunset: 4:38 PM
Civil Sunrise:06:32 AM
Civil Sunset: 5:08 PM
Nautical Sunrise: 05:59 AM
Nautical Sunset: 5:40 PM
Astro Sunrise: 05:27 AM
Astro Sunset: 6:12 PM
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