Greenbriar, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Greenbriar, IL in one place.
Showers and thunderstorms. Partly sunny, with a high near 86. East wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Greenbriar, 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: Sep 14, 2026 2:46 PM CDT.
The active forecast window currently covers Sep 16 to Sep 20, 2026 for Greenbriar, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 20, 2026
- Latest sync
- Sep 14, 2026 2:46 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Greenbriar
Thursday looks like the warmest upcoming period in Greenbriar at 87 degrees F.
Sunday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Saturday at about 13 mph SW.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 2:46 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southeast wind around 8 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. West wind around 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 68.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 84.
A chance of showers and thunderstorms. Partly cloudy, with a low around 65.
A chance of showers and thunderstorms. Partly sunny, with a high near 80.
A chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Showers And Thunderstorms
|
86°F |
8 mph
E
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
71°F |
8 mph
SE
|
|
Thursday
Sep 17
|
Chance Showers And Thunderstorms
|
87°F |
8 mph
W
|
|
Thursday Night
Sep 17
|
Mostly Cloudy then Slight Chance Rain Showers
|
68°F |
7 mph
NE
|
|
Friday
Sep 18
|
Chance Showers And Thunderstorms
|
85°F |
8 mph
E
|
|
Friday Night
Sep 18
|
Slight Chance Showers And Thunderstorms
|
68°F |
7 to 10 mph
SE
|
|
Saturday
Sep 19
|
Chance Rain Showers
|
84°F |
13 mph
SW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
65°F |
12 mph
N
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
80°F |
9 to 13 mph
ENE
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
62°F |
8 to 13 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Greenbriar.