Big Rock, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Big Rock, IL in one place.
Showers and thunderstorms. Cloudy, with a high near 79. South southeast wind around 15 mph, with gusts as high as 25 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 Big Rock, 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: Jun 8, 2026 6:25 PM CDT.
The active forecast window currently covers Jun 8 to Jun 14, 2026 for Big Rock, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 8 to Jun 14, 2026
- Latest sync
- Jun 8, 2026 6:25 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Big Rock
Wednesday looks like the warmest upcoming period in Big Rock at 90 degrees F.
Sunday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Wednesday at about 10 to 20 mph SSW.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 8, 2026 6:25 PM CDT
- Coverage
- 7 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
Showers and thunderstorms likely before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 69. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
A slight chance of showers and thunderstorms before 8am. Partly sunny, with a high near 86. West southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers between 10pm and midnight, then a chance of showers and thunderstorms between midnight and 5am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South southwest wind 5 to 10 mph. Chance of precipitation is 40%.
A chance of rain showers before 7am. Mostly sunny, with a high near 90. South southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Showers and thunderstorms after 7pm. Mostly cloudy, with a low around 70. Chance of precipitation is 80%.
Showers and thunderstorms. Partly sunny, with a high near 86.
Showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.
Mostly sunny, with a high near 81.
Clear, with a low around 61.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 84.
A chance of showers and thunderstorms. Partly cloudy, with a low around 59.
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 77.
A slight chance of rain showers after 7pm. Partly cloudy, with a low around 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jun 8
|
Showers And Thunderstorms
|
79°F |
15 mph
SSE
|
|
Tonight
Jun 8
|
Showers And Thunderstorms Likely
|
69°F |
5 to 10 mph
S
|
|
Tuesday
Jun 9
|
Slight Chance Showers And Thunderstorms then Partly Sunny
|
86°F |
5 to 10 mph
WSW
|
|
Tuesday Night
Jun 9
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
69°F |
5 to 10 mph
SSW
|
|
Wednesday
Jun 10
|
Chance Rain Showers then Mostly Sunny
|
90°F |
10 to 20 mph
SSW
|
|
Wednesday Night
Jun 10
|
Showers And Thunderstorms
|
70°F |
10 to 20 mph
SW
|
|
Thursday
Jun 11
|
Showers And Thunderstorms
|
86°F |
10 to 20 mph
SSW
|
|
Thursday Night
Jun 11
|
Showers And Thunderstorms
|
60°F |
10 to 20 mph
WSW
|
|
Friday
Jun 12
|
Mostly Sunny
|
81°F |
5 to 15 mph
W
|
|
Friday Night
Jun 12
|
Clear
|
61°F |
5 to 15 mph
WSW
|
|
Saturday
Jun 13
|
Sunny then Slight Chance Showers And Thunderstorms
|
84°F |
5 to 15 mph
WSW
|
|
Saturday Night
Jun 13
|
Chance Showers And Thunderstorms
|
59°F |
5 to 10 mph
WNW
|
|
Sunday
Jun 14
|
Chance Showers And Thunderstorms
|
77°F |
5 to 15 mph
NNW
|
|
Sunday Night
Jun 14
|
Slight Chance Rain Showers
|
56°F |
5 to 15 mph
N
|
Nearby Forecasts
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