Brown County, IL Weather Forecast
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Slight Chance Showers And Thunderstorms
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A slight chance of showers and thunderstorms between 10am and 11am, then a chance of showers and thunderstorms between 11am and noon, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Northeast wind around 6 mph. Chance of precipitation is 30%.
County Weather Overview
This county weather page brings together forecast coverage for Brown County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 0 of 0 mapped cities in Brown County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jun 1 to Jun 6, 2026
- Latest sync
- May 31, 2026 5:25 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Brown County
Friday looks like the warmest upcoming period in Brown County at 87 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Friday at about 9 to 13 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- May 31, 2026 5:25 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 59. Northeast wind around 6 mph. Chance of precipitation is 20%.
Sunny, with a high near 81.
Mostly clear, with a low around 56.
Sunny, with a high near 81.
Mostly clear, with a low around 57.
Sunny, with a high near 85.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Jun 1
|
Slight Chance Showers And Thunderstorms
|
84°F |
6 mph
NE
|
|
Monday Night
Jun 1
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
59°F |
6 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
81°F |
6 to 9 mph
E
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
56°F |
3 to 7 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
81°F |
7 mph
SE
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
57°F |
6 mph
SE
|
|
Thursday
Jun 4
|
Sunny
|
85°F |
6 to 10 mph
S
|
|
Thursday Night
Jun 4
|
Partly Cloudy then Slight Chance Rain Showers
|
62°F |
8 mph
S
|
|
Friday
Jun 5
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
87°F |
9 to 13 mph
SW
|
|
Friday Night
Jun 5
|
Chance Showers And Thunderstorms
|
65°F |
9 mph
SW
|
|
Saturday
Jun 6
|
Chance Showers And Thunderstorms
|
87°F |
10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Brown County.
Nearby forecast pages are not available for this location yet.
Coverage
Forecast coverage currently spans 0 of 0 mapped cities in Brown County.
