Oak Grove, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Oak Grove, IL in one place.
A chance of showers and thunderstorms between 11am and 4pm, then patchy smoke and a slight chance of showers and thunderstorms. Mostly sunny. High near 89, with temperatures falling to around 83 in the afternoon. Heat index values as high as 98. Northwest wind 10 to 15 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Oak Grove, 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 17, 2026 3:18 PM CDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Oak Grove, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 3:18 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Oak Grove
Saturday looks like the warmest upcoming period in Oak Grove at 89 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Saturday at about 10 to 15 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 3:18 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Areas of smoke before 1am. Partly cloudy, with a low around 65. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunny, with a high near 82. East northeast wind around 5 mph.
Partly cloudy, with a low around 66.
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Partly cloudy, with a low around 70.
A chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 85.
Mostly clear, with a low around 61.
Sunny, with a high near 79.
Mostly clear, with a low around 60.
Sunny, with a high near 81.
Partly cloudy, with a low around 62.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms
|
89°F |
10 to 15 mph
NW
|
|
Saturday Night
Jul 18
|
Areas Of Smoke
|
65°F |
5 to 10 mph
NNE
|
|
Sunday
Jul 19
|
Sunny
|
82°F |
5 mph
ENE
|
|
Sunday Night
Jul 19
|
Partly Cloudy
|
66°F |
5 mph
SE
|
|
Monday
Jul 20
|
Partly Sunny then Slight Chance Showers And Thunderstorms
|
87°F |
5 to 15 mph
SSW
|
|
Monday Night
Jul 20
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
70°F |
10 to 15 mph
WSW
|
|
Tuesday
Jul 21
|
Chance Showers And Thunderstorms then Mostly Sunny
|
85°F |
10 to 15 mph
WNW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
61°F |
5 to 15 mph
NNW
|
|
Wednesday
Jul 22
|
Sunny
|
79°F |
5 to 10 mph
N
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
60°F |
0 to 10 mph
NNW
|
|
Thursday
Jul 23
|
Sunny
|
81°F |
0 to 5 mph
SSE
|
|
Thursday Night
Jul 23
|
Partly Cloudy
|
62°F |
0 to 5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Oak Grove.