Barnett, IL Weather Forecast
Local 7-day forecast
Partly Sunny then Isolated Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Barnett, IL in one place.
Isolated showers and thunderstorms after 1pm. Partly sunny, with a high near 89. Northwest wind 6 to 10 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Barnett, 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: Jul 27, 2026 11:24 PM CDT.
The active forecast window currently covers Jul 28 to Aug 3, 2026 for Barnett, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 28 to Aug 3, 2026
- Latest sync
- Jul 27, 2026 11:24 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Barnett
Tuesday looks like the warmest upcoming period in Barnett at 89 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Saturday at about 9 to 14 mph NE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 27, 2026 11:24 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
Isolated showers and thunderstorms before midnight. Partly cloudy, with a low around 68. Northeast wind 2 to 9 mph. Chance of precipitation is 20%.
Sunny, with a high near 86. Northeast wind 2 to 8 mph.
Mostly clear, with a low around 66. East wind 1 to 7 mph.
Sunny, with a high near 87.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 69. Chance of precipitation is 20%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 67. Chance of precipitation is 20%.
Sunny, with a high near 85.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 28
|
Partly Sunny then Isolated Showers And Thunderstorms
|
89°F |
6 to 10 mph
NW
|
|
Tuesday Night
Jul 28
|
Isolated Showers And Thunderstorms then Partly Cloudy
|
68°F |
2 to 9 mph
NE
|
|
Wednesday
Jul 29
|
Sunny
|
86°F |
2 to 8 mph
NE
|
|
Wednesday Night
Jul 29
|
Mostly Clear
|
66°F |
1 to 7 mph
E
|
|
Thursday
Jul 30
|
Sunny
|
87°F |
1 to 5 mph
SE
|
|
Thursday Night
Jul 30
|
Partly Cloudy then Slight Chance Rain Showers
|
69°F |
5 mph
SE
|
|
Friday
Jul 31
|
Chance Rain Showers
|
84°F |
3 to 10 mph
S
|
|
Friday Night
Jul 31
|
Showers And Thunderstorms Likely
|
69°F |
7 to 10 mph
SE
|
|
Saturday
Aug 1
|
Showers And Thunderstorms Likely
|
82°F |
9 to 14 mph
NE
|
|
Saturday Night
Aug 1
|
Chance Showers And Thunderstorms
|
68°F |
6 to 13 mph
N
|
|
Sunday
Aug 2
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
85°F |
7 to 12 mph
NE
|
|
Sunday Night
Aug 2
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
67°F |
2 to 9 mph
NE
|
|
Monday
Aug 3
|
Sunny
|
85°F |
2 to 6 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Barnett.