Marion County, IL Weather Forecast
County weather hub
Mostly Clear then Chance 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.
A chance of showers and thunderstorms after 4am. Mostly clear, with a low around 72. Southwest wind 3 to 8 mph. Chance of precipitation is 30%.
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
- Oct 13 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 8:03 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 37 degrees F.
The strongest winds are forecast for Friday at about 17 to 23 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 8:03 PM CDT
- Coverage
- 8 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
A chance of showers and thunderstorms before 7am, then showers and thunderstorms between 7am and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 79. West wind around 3 mph. Chance of precipitation is 80%.
A chance of showers and thunderstorms before 4am, then showers and thunderstorms likely. Mostly cloudy, with a low around 66. Northeast wind around 2 mph. Chance of precipitation is 60%.
Showers and thunderstorms. Mostly cloudy, with a high near 84. South wind 1 to 12 mph. Chance of precipitation is 90%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 10pm, then a chance of showers and thunderstorms. Mostly cloudy. Low around 50, with temperatures rising to around 54 overnight. West wind 6 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 61. Chance of precipitation is 20%.
Mostly clear, with a low around 37.
Sunny, with a high near 62.
Clear, with a low around 37.
Sunny, with a high near 70.
Partly cloudy, with a low around 45.
Mostly sunny, with a high near 73.
Partly cloudy, with a low around 48.
Mostly sunny, with a high near 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tonight
Oct 13
|
Mostly Clear then Chance Showers And Thunderstorms
|
72°F |
3 to 8 mph
SW
|
|
Wednesday
Oct 14
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
79°F |
3 mph
W
|
|
Wednesday Night
Oct 14
|
Chance Showers And Thunderstorms
|
66°F |
2 mph
NE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
84°F |
1 to 12 mph
S
|
|
Thursday Night
Oct 15
|
Chance Showers And Thunderstorms
|
50°F |
6 to 17 mph
W
|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Mostly Sunny
|
61°F |
17 to 23 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
37°F |
3 to 17 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
62°F |
1 to 5 mph
NE
|
|
Saturday Night
Oct 17
|
Clear
|
37°F |
1 mph
SE
|
|
Sunday
Oct 18
|
Sunny
|
70°F |
1 to 7 mph
S
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
45°F |
1 to 5 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
73°F |
2 to 6 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
48°F |
0 to 3 mph
E
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
78°F |
0 to 5 mph
SE
|
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.
