Big Rock, IL Weather Forecast
Local 7-day forecast
Partly Sunny then Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Big Rock, IL in one place.
A chance of rain showers after noon. Partly sunny. High near 53, with temperatures falling to around 51 in the afternoon. Northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth 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: Oct 15, 2026 7:06 PM CDT.
The active forecast window currently covers Oct 16 to Oct 21, 2026 for Big Rock, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 16 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 7:06 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 73 degrees F.
Friday Night is the coolest period ahead with temperatures near 32 degrees F.
The strongest winds are forecast for Friday at about 15 to 20 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 7:06 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
A chance of rain showers before 7pm. Mostly clear, with a low around 32. North northwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Widespread frost before 9am. Sunny, with a high near 58. West wind around 5 mph, with gusts as high as 15 mph.
Areas of frost after 4am. Clear, with a low around 36.
Areas of frost before 8am. Sunny, with a high near 65.
Mostly clear, with a low around 39.
Mostly sunny, with a high near 69.
Partly cloudy, with a low around 42.
Mostly sunny, with a high near 72.
Mostly clear, with a low around 44.
Sunny, with a high near 73.
Mostly clear, with a low around 48.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 16
|
Partly Sunny then Chance Rain Showers
|
53°F |
15 to 20 mph
NW
|
|
Friday Night
Oct 16
|
Chance Rain Showers then Mostly Clear
|
32°F |
10 to 20 mph
NNW
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
58°F |
5 mph
W
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
36°F |
5 mph
SSW
|
|
Sunday
Oct 18
|
Areas Of Frost then Sunny
|
65°F |
5 to 15 mph
SSW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
39°F |
5 to 10 mph
SSW
|
|
Monday
Oct 19
|
Mostly Sunny
|
69°F |
0 to 5 mph
SSW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
42°F |
0 to 5 mph
S
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
72°F |
0 to 5 mph
SE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
44°F |
0 to 5 mph
E
|
|
Wednesday
Oct 21
|
Sunny
|
73°F |
0 to 5 mph
SE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
48°F |
5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Big Rock.
