Posey, Illinois Weather
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Click for Hazardous Weather Outlook for Posey, Illinois
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Weather Forecast for Posey, Illinois : Clinton County
Issued: 2:21 am CDT Sep 16, 2025 Latitude: 38.5369936 Longitude: -89.3525802 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Overnight Sunny on Tuesday Sunny on Wednesday Sunny on Thursday 30% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday 30% chance of rain on Sunday 30% chance of thunderstorms on Monday
Low: 65°F High: 94°F High: 93°F High: 94°F High: 89°F High: 84°F High: 86°F High: 86°F
Low: 63°F Low: 62°F Low: 64°F Low: 64°F Low: 64°F Low: 65°F  
Mostly Clear Sunny Sunny Sunny Thunderstorms Thunderstorms Rain Thunderstorms
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Current Conditions at
CENTRALIA MUNICIPAL ARPT - (KENL)
64°
Clear
as of 3:15 AM CDST
Rel. Humidity: 82%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
SALEM-LECKRONE ARPT - (KSLO)
72°
Clear
as of 3:15 AM CDST
Rel. Humidity: 73%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
SCOTT AFB - (KBLV)
70°
Clear
as of 2:55 AM CDST
Rel. Humidity: 88%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
66°
Clear
as of 2:56 AM CDST
Rel. Humidity: 93%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
5 MPH
010° North
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 65. Calm wind.
Sunny on Tuesday Tuesday... Sunny, with a high near 94. North wind 3 to 7 mph.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 63. Northeast wind around 6 mph.
Sunny on Wednesday Wednesday... Sunny, with a high near 93. Calm wind becoming east around 5 mph.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 62. Light southeast wind.
Sunny on Thursday Thursday... Sunny, with a high near 94.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 64.
30% 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. Chance of precipitation is 30%.
40% chance of thunderstorms Friday Night Friday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
30% chance of thunderstorms Saturday Saturday... A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
20% chance of thunderstorms Saturday Night Saturday Night... A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
30% chance of rain Sunday Sunday... A 30 percent chance of showers. Mostly sunny, with a high near 86.
30% chance of thunderstorms Sunday Night Sunday Night... A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
30% chance of thunderstorms Monday Monday... A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Current Radar Image


Sun Almanac for Posey, Illinois
Sunrise: 06:40 AM
Sunset: 7:04 PM
Civil Sunrise:06:14 AM
Civil Sunset: 7:30 PM
Nautical Sunrise: 05:43 AM
Nautical Sunset: 8:02 PM
Astro Sunrise: 05:11 AM
Astro Sunset: 8:33 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.