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Post Oak, Illinois Weather Forecast
Post Oak, Illinois Weather
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Weather Forecast for Post Oak, Illinois : Fayette County
Issued: 2:31 pm CST Dec 17, 2025 Latitude: 39.0903213 Longitude: -88.9092302 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Thursday Friday Saturday Sunday Monday Tuesday
Sunny on This Afternoon 20% chance of rain on Tonight 90% chance of thunderstorms on Thursday Sunny on Friday Partly Sunny on Saturday Mostly Sunny on Sunday Partly Sunny on Monday 20% chance of rain on Tuesday
High: 52°F Low: 41 °F High: 42 °F High: 34°F High: 50°F High: 39°F High: 43°F High: 54°F
Low: 20°F Low: 27°F Low: 23°F Low: 26°F Low: 37°F  
Sunny Rain Thunderstorms Sunny Partly Sunny Mostly Sunny Partly Sunny Rain
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Current Conditions at
EFFINGHAM COUNTY MEMORIAL - (K1H2)
52°
Clear
as of 2:15 PM CST
Rel. Humidity: 57%
Dew Point: 37°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
SALEM-LECKRONE ARPT - (KSLO)
55°
Clear
as of 2:15 PM CST
Rel. Humidity: 47%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
3 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
TAYLORVILLE MUNICIPAL - (KTAZ)
43°
Clear
as of 2:10 PM CST
Rel. Humidity: 75%
Dew Point: 36°F
Visibility: 7 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
6 MPH
050° Northeast
Cloud Level(s): Clear
Current Conditions at
FLORA MUNICIPAL AIRPORT - (KFOA)
54°
Clear
as of 2:15 PM CST
Rel. Humidity: 50%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
6 MPH
190° South
Cloud Level(s): Clear
Sunny on This Afternoon This Afternoon... Sunny, with a high near 52. Calm wind becoming southeast around 6 mph.
20% chance of rain Tonight Tonight... Isolated showers after 2am. Increasing clouds, with a temperature falling to near 41 by 8pm, then rising to around 51 during the remainder of the night. South wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 20%.
90% chance of thunderstorms Thursday Thursday... Showers and possibly a thunderstorm before 4pm, then isolated showers between 4pm and 5pm. Temperature falling to around 42 by 5pm. Breezy, with a south wind 15 to 21 mph becoming west in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 90%.
20% chance of rain & snow Thursday Night Thursday Night... A slight chance of rain showers before 8pm, then a slight chance of snow showers between 8pm and midnight. Partly cloudy, with a low around 20. West wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Sunny on Friday Friday... Sunny, with a high near 34. West wind 6 to 14 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 27.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 50.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 23.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 39.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 26.
Partly Sunny on Monday Monday... Partly sunny, with a high near 43.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 37.
20% chance of rain Tuesday Tuesday... A 20 percent chance of rain. Partly sunny, with a high near 54.
Current Radar Image


Sun Almanac for Post Oak, Illinois
Sunrise: 07:09 AM
Sunset: 4:35 PM
Civil Sunrise:06:39 AM
Civil Sunset: 5:05 PM
Nautical Sunrise: 06:06 AM
Nautical Sunset: 5:38 PM
Astro Sunrise: 05:33 AM
Astro Sunset: 6:11 PM
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