Monroe County, IL Weather Forecast
County weather hub
Showers And Thunderstorms Likely
Compare major city weather across Monroe County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Showers and thunderstorms likely. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
County Weather Overview
This county weather page brings together forecast coverage for Monroe County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 3 of 3 mapped cities in Monroe County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 20 to May 24, 2026
- Latest sync
- May 18, 2026 2:59 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Monroe County
Sunday looks like the warmest upcoming period in Monroe County at 86 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Wednesday at about 8 to 12 mph N.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 18, 2026 2:59 AM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
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 cloudy, with a low around 51. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Mostly cloudy, with a high near 76. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
May 20
|
Showers And Thunderstorms Likely
|
69°F |
8 to 12 mph
N
|
|
Wednesday Night
May 20
|
Slight Chance Showers And Thunderstorms then Mostly Cloudy
|
51°F |
8 mph
NE
|
|
Thursday
May 21
|
Partly Sunny then Slight Chance Showers And Thunderstorms
|
72°F |
8 mph
E
|
|
Thursday Night
May 21
|
Slight Chance Showers And Thunderstorms
|
55°F |
7 mph
E
|
|
Friday
May 22
|
Chance Showers And Thunderstorms
|
76°F |
6 mph
NE
|
|
Friday Night
May 22
|
Chance Showers And Thunderstorms
|
59°F |
6 mph
N
|
|
Saturday
May 23
|
Chance Showers And Thunderstorms
|
81°F |
5 mph
SE
|
|
Saturday Night
May 23
|
Chance Showers And Thunderstorms
|
61°F |
5 mph
SE
|
|
Sunday
May 24
|
Chance Showers And Thunderstorms
|
86°F |
6 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Monroe County.
Coverage
Forecast coverage currently spans 3 of 3 mapped cities in Monroe County.
Largest mapped city population in this region: 10,627.