Fayetteville, IL Weather Forecast
Local 7-day forecast
Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Fayetteville, IL in one place.
A slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 82. Southwest wind around 8 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Fayetteville, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 16, 2026 2:11 PM CDT.
The active forecast window currently covers Apr 16 to Apr 22, 2026 for Fayetteville, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 16 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 2:11 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fayetteville
Friday looks like the warmest upcoming period in Fayetteville at 84 degrees F.
Saturday Night is the coolest period ahead with temperatures near 40 degrees F.
The strongest winds are forecast for Friday at about 5 to 14 mph S.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 2:11 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 59. South wind around 5 mph.
A slight chance of showers and thunderstorms between 8am and 9am, then a chance of showers and thunderstorms between 9am and 10am. Mostly sunny, with a high near 84. South wind 5 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms between 10pm and midnight, then showers and thunderstorms likely between midnight and 1am, then showers and thunderstorms between 1am and 4am, then showers and thunderstorms. Mostly cloudy. Low around 51, with temperatures rising to around 61 overnight. Southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Showers and thunderstorms. Partly sunny. High near 63, with temperatures falling to around 58 in the afternoon. Northwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
A chance of rain showers before 1am. Mostly clear, with a low around 40. Chance of precipitation is 40%.
Sunny, with a high near 65.
Clear, with a low around 42.
Sunny, with a high near 71.
Mostly clear, with a low around 51.
Mostly sunny, with a high near 76.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 54. Chance of precipitation is 20%.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Apr 16
|
Slight Chance Showers And Thunderstorms
|
82°F |
8 mph
SW
|
|
Tonight
Apr 16
|
Mostly Clear
|
59°F |
5 mph
S
|
|
Friday
Apr 17
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
84°F |
5 to 14 mph
S
|
|
Friday Night
Apr 17
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
51°F |
10 to 14 mph
SW
|
|
Saturday
Apr 18
|
Showers And Thunderstorms
|
63°F |
14 mph
NW
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
40°F |
6 to 13 mph
NW
|
|
Sunday
Apr 19
|
Sunny
|
65°F |
5 to 10 mph
NW
|
|
Sunday Night
Apr 19
|
Clear
|
42°F |
3 to 7 mph
E
|
|
Monday
Apr 20
|
Sunny
|
71°F |
5 to 9 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
51°F |
8 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
76°F |
6 to 12 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy then Slight Chance Rain Showers
|
54°F |
6 to 9 mph
SW
|
|
Wednesday
Apr 22
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
78°F |
6 to 10 mph
SW
|
|
Wednesday Night
Apr 22
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
56°F |
9 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fayetteville.