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Fayetteville, Illinois Weather Forecast
Fayetteville, Illinois Weather
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Weather Forecast for Fayetteville, Illinois : St. Clair County
Issued: 12:21 pm CST Dec 17, 2025 Latitude: 38.3775489 Longitude: -89.7953771 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 80% chance of thunderstorms on Thursday Sunny on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday 20% chance of rain on Monday 20% chance of rain on Tuesday
High: 55°F Low: 53 °F High: 54 °F High: 40°F High: 56°F High: 43°F High: 47°F High: 60°F
Low: 24°F Low: 32°F Low: 26°F Low: 29°F Low: 42°F  
Sunny Rain Thunderstorms Sunny Mostly Sunny Mostly Sunny Rain Rain
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Current Conditions at
SCOTT AFB - (KBLV)
50°
Mostly Cloudy
as of 12:55 PM CST
Rel. Humidity: 53%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
5 MPH
180° South
Cloud Level(s): Few at 4000ft, Broken at 12000ft
Current Conditions at
SPARTA - (KSAR)
55°
Clear
as of 12:55 PM CST
Rel. Humidity: 47%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
7 MPH
130° Southeast
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
55°
Clear
as of 12:53 PM CST
Rel. Humidity: 47%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CENTRALIA MUNICIPAL ARPT - (KENL)
Clear
as of 12:55 PM CST
Wind Data
Calm
Sunny on This Afternoon This Afternoon... Sunny, with a high near 55. South wind 3 to 7 mph.

20% chance of rain Tonight Tonight... Isolated showers before 4am, then isolated showers after 5am. Increasing clouds, with a temperature rising to around 53 by 4am. South wind 8 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

80% chance of thunderstorms Thursday Thursday... Showers and possibly a thunderstorm before 1pm, then scattered showers between 1pm and 3pm. Temperature rising to near 54 by 8am, then falling to around 44 during the remainder of the day. Breezy, with a south wind 14 to 20 mph becoming west in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 80%.

Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 24. West wind 9 to 16 mph, with gusts as high as 29 mph.

Sunny on Friday Friday... Sunny, with a high near 40. West wind 6 to 8 mph becoming south in the afternoon.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 32.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 56.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 26.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 43.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 29.

20% chance of rain Monday Monday... A 20 percent chance of rain. Partly sunny, with a high near 47.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 42.

20% chance of rain Tuesday Tuesday... A 20 percent chance of rain. Partly sunny, with a high near 60.

Current Radar Image


Sun Almanac for Fayetteville, Illinois
Sunrise: 07:11 AM
Sunset: 4:40 PM
Civil Sunrise:06:41 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 5:43 PM
Astro Sunrise: 05:36 AM
Astro Sunset: 6:16 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.