Marion County, IL Weather Forecast
County weather hub
Showers And Thunderstorms
Compare major city weather across Marion County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain showers before 10am, then showers and thunderstorms. Mostly cloudy, with a high near 79. Chance of precipitation is 80%.
County Weather Overview
This county weather page brings together forecast coverage for Marion 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 Marion County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 26 to May 29, 2026
- Latest sync
- May 23, 2026 5:32 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Marion County
Thursday looks like the warmest upcoming period in Marion County at 84 degrees F.
Friday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Friday at about 6 to 9 mph NE.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- May 23, 2026 5:32 PM CDT
- Coverage
- 4 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KVWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 80%.
Showers and thunderstorms likely. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 70%.
A chance of rain showers before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Showers And Thunderstorms
|
79°F |
6 mph
E
|
|
Tuesday Night
May 26
|
Showers And Thunderstorms
|
67°F |
6 mph
SE
|
|
Wednesday
May 27
|
Showers And Thunderstorms Likely
|
81°F |
6 mph
S
|
|
Wednesday Night
May 27
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
67°F |
3 mph
SE
|
|
Thursday
May 28
|
Slight Chance Showers And Thunderstorms
|
84°F |
3 mph
SE
|
|
Thursday Night
May 28
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
65°F |
2 to 6 mph
NE
|
|
Friday
May 29
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
78°F |
6 to 9 mph
NE
|
|
Friday Night
May 29
|
Chance Showers And Thunderstorms
|
60°F |
8 mph
NE
|
Major City Forecasts
Live forecast snapshots for major cities across Marion County.
Coverage
Forecast coverage currently spans 3 of 3 mapped cities in Marion County.
Largest mapped city population in this region: 6,952.
