Jamestown, Illinois Weather
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Weather Forecast for Jamestown, Illinois : Hamilton County
Issued: 9:20 pm CDT Jun 5, 2025 Latitude: 38.0389358 Longitude: -88.3742125 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
20% chance of thunderstorms on Tonight 80% chance of thunderstorms on Friday 70% chance of thunderstorms on Saturday Mostly Sunny on Sunday 10% chance of thunderstorms on Monday Sunny on Tuesday Mostly Sunny on Wednesday 10% chance of on Thursday
Low: 67°F High: 80°F High: 80°F High: 83°F High: 80°F High: 78°F High: 82°F High: 82°F
Low: 65°F Low: 66°F Low: 63°F Low: 60°F Low: 58°F Low: 61°F  
Thunderstorms Thunderstorms Thunderstorms Mostly Sunny Thunderstorms Sunny Mostly Sunny Partly Sunny
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Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
70°
Clear
as of 10:15 PM CDST
Rel. Humidity: 94%
Dew Point: 68°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
5 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
FAIRFIELD MUNICIPAL ARPT - (KFWC)
70°
Clear
as of 10:15 PM CDST
Rel. Humidity: 94%
Dew Point: 68°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
70°
Clear
Mist
as of 9:56 PM CDST
Rel. Humidity: 94%
Dew Point: 68°F
Visibility: 6 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
3 MPH
240° Southwest
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
68°
Clear
Mist
as of 10:15 PM CDST
Rel. Humidity: 93%
Dew Point: 66°F
Visibility: 4 Miles
Pressure: 30.02 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Clear
20% chance of thunderstorms Tonight Tonight... A slight chance of showers and thunderstorms between 3am and 4am. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 20%.
80% chance of thunderstorms Friday Friday... Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 5pm, then showers and thunderstorms after 5pm. High near 80. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 80%.
80% chance of thunderstorms Friday Night Friday Night... Showers and thunderstorms before 1am, then a slight chance of showers. Low around 65. North northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
70% chance of thunderstorms Saturday Saturday... A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%.
50% chance of thunderstorms Saturday Night Saturday Night... A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 66. Southwest wind 3 to 6 mph. Chance of precipitation is 50%.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 83. West wind 6 to 9 mph.
20% chance of thunderstorms Sunday Night Sunday Night... A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. West wind 3 to 6 mph.
10% chance of thunderstorms Monday Monday... A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. Southwest wind 5 to 8 mph.
10% chance of thunderstorms Monday Night Monday Night... A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 60. West southwest wind around 5 mph becoming calm in the evening.
Sunny on Tuesday Tuesday... Sunny, with a high near 78. West northwest wind 3 to 7 mph.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 58. Light northwest wind.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 82. Light and variable wind.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 61. Calm wind.
10% chance of Thursday Thursday... A slight chance of showers. Partly sunny, with a high near 82. Calm wind becoming south southeast around 6 mph in the morning.
Current Radar Image


Sun Almanac for Jamestown, Illinois
Sunrise: 05:31 AM
Sunset: 8:13 PM
Civil Sunrise:05:00 AM
Civil Sunset: 8:44 PM
Nautical Sunrise: 04:21 AM
Nautical Sunset: 9:23 PM
Astro Sunrise: 03:37 AM
Astro Sunset: 10:07 PM
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