Jamestown, Illinois Weather
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Weather Forecast for Jamestown, Illinois : Perry County
Issued: 2:46 am CDT Sep 16, 2025 Latitude: 38.0497734 Longitude: -89.5292607 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Overnight Morning Fog on Tuesday Sunny on Wednesday Sunny on Thursday 20% chance of thunderstorms on Friday 20% chance of thunderstorms on Saturday 20% chance of on Sunday 20% chance of thunderstorms on Monday
Low: 67°F High: 94°F High: 93°F High: 95°F High: 89°F High: 85°F High: 86°F High: 86°F
Low: 64°F Low: 62°F Low: 65°F Low: 64°F Low: 64°F Low: 65°F  
Mostly Clear Morning Fog Sunny Sunny Thunderstorms Thunderstorms Partly Sunny Thunderstorms
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Current Conditions at
SPARTA - (KSAR)
72°
Clear
as of 3:15 AM CDST
Rel. Humidity: 83%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
66°
Clear
Mist
as of 2:52 AM CDST
Rel. Humidity: 93%
Dew Point: 64°F
Visibility: 5 Miles
Pressure: 30.08 in.
Flight Rule: MVFR
Wind Data
3 MPH
350° North
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
64°
Clear
as of 3:15 AM CDST
Rel. Humidity: 93%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
68°
Clear
as of 3:15 AM CDST
Rel. Humidity: 93%
Dew Point: 66°F
Visibility: 7 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 67. Calm wind.
Morning Fog on Tuesday Tuesday... Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 94. Calm wind becoming east around 6 mph in the afternoon.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 64. Light northeast wind.
Sunny on Wednesday Wednesday... Sunny, with a high near 93. Light east northeast wind.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 62. Light and variable wind.
Sunny on Thursday Thursday... Sunny, with a high near 95. Calm wind becoming south southeast around 6 mph in the afternoon.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 65. Light southeast wind.
20% chance of thunderstorms Friday Friday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. Calm wind becoming south southeast around 6 mph in the afternoon.
20% chance of thunderstorms Friday Night Friday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. West southwest wind around 5 mph becoming calm in the evening.
20% chance of thunderstorms Saturday Saturday... A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 85. Calm wind becoming south southwest around 6 mph in the morning.
10% chance of thunderstorms Saturday Night Saturday Night... A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. Light south wind.
20% chance of Sunday Sunday... A chance of showers. Partly sunny, with a high near 86. Calm wind becoming south 5 to 9 mph in the morning.
20% chance of thunderstorms Sunday Night Sunday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 65. South wind around 6 mph.
20% chance of thunderstorms Monday Monday... A chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind 5 to 8 mph.
Current Radar Image


Sun Almanac for Jamestown, Illinois
Sunrise: 06:41 AM
Sunset: 7:04 PM
Civil Sunrise:06:15 AM
Civil Sunset: 7:31 PM
Nautical Sunrise: 05:44 AM
Nautical Sunset: 8:02 PM
Astro Sunrise: 05:12 AM
Astro Sunset: 8:33 PM
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