Marion County, IL Weather Forecast
County weather hub
Sunny
Compare major city weather across Marion County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 84. East wind around 2 mph.
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
- Aug 25 to Aug 30, 2026
- Latest sync
- Aug 24, 2026 6:22 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Marion County
Sunday looks like the warmest upcoming period in Marion County at 91 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Sunday at about 2 to 7 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 24, 2026 6:22 AM CDT
- Coverage
- 6 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
Partly cloudy, with a low around 64. East wind around 2 mph.
Mostly sunny, with a high near 87.
A chance of showers and thunderstorms between 7pm and 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Sunny, with a high near 87.
Mostly clear, with a low around 64.
Sunny, with a high near 86.
Mostly clear, with a low around 65.
Mostly sunny, with a high near 88.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 69. Chance of precipitation is 20%.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Aug 25
|
Sunny
|
84°F |
2 mph
E
|
|
Tuesday Night
Aug 25
|
Partly Cloudy
|
64°F |
2 mph
E
|
|
Wednesday
Aug 26
|
Mostly Sunny
|
87°F |
0 to 3 mph
SW
|
|
Wednesday Night
Aug 26
|
Chance Showers And Thunderstorms
|
66°F |
1 mph
W
|
|
Thursday
Aug 27
|
Sunny
|
87°F |
0 to 6 mph
NW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
64°F |
0 to 3 mph
N
|
|
Friday
Aug 28
|
Sunny
|
86°F |
2 mph
N
|
|
Friday Night
Aug 28
|
Mostly Clear
|
65°F |
1 mph
E
|
|
Saturday
Aug 29
|
Mostly Sunny
|
88°F |
3 mph
SE
|
|
Saturday Night
Aug 29
|
Partly Cloudy then Slight Chance Rain Showers
|
69°F |
2 mph
SE
|
|
Sunday
Aug 30
|
Slight Chance Rain Showers then Mostly Sunny
|
91°F |
2 to 7 mph
S
|
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.
