Mason County, IL Weather Forecast
County weather hub
Partly Sunny
Compare major city weather across Mason County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Partly sunny, with a high near 85. South wind 3 to 8 mph, with gusts as high as 16 mph.
County Weather Overview
This county weather page brings together forecast coverage for Mason County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 2 of 2 mapped cities in Mason County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 29 to Sep 3, 2026
- Latest sync
- Aug 28, 2026 5:40 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Mason County
Tuesday looks like the warmest upcoming period in Mason County at 97 degrees F.
Saturday Night is the coolest period ahead with temperatures near 70 degrees F.
The strongest winds are forecast for Sunday at about 7 to 10 mph S.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Aug 28, 2026 5:40 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
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 70. South wind 5 to 8 mph, with gusts as high as 20 mph.
Mostly sunny, with a high near 91. South wind 7 to 10 mph, with gusts as high as 21 mph.
Mostly clear, with a low around 74. South wind around 7 mph, with gusts as high as 18 mph.
Sunny, with a high near 95. South southwest wind around 8 mph, with gusts as high as 17 mph.
Mostly clear, with a low around 76.
Sunny, with a high near 97.
Mostly clear, with a low around 76.
Mostly sunny, with a high near 96.
Mostly clear, with a low around 75.
Sunny, with a high near 95.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Partly Sunny
|
85°F |
3 to 8 mph
S
|
|
Saturday Night
Aug 29
|
Partly Cloudy
|
70°F |
5 to 8 mph
S
|
|
Sunday
Aug 30
|
Mostly Sunny
|
91°F |
7 to 10 mph
S
|
|
Sunday Night
Aug 30
|
Mostly Clear
|
74°F |
7 mph
S
|
|
Monday
Aug 31
|
Sunny
|
95°F |
8 mph
SSW
|
|
Monday Night
Aug 31
|
Mostly Clear
|
76°F |
7 mph
S
|
|
Tuesday
Sep 1
|
Sunny
|
97°F |
7 mph
SSW
|
|
Tuesday Night
Sep 1
|
Mostly Clear
|
76°F |
6 mph
SSW
|
|
Wednesday
Sep 2
|
Mostly Sunny
|
96°F |
7 mph
SW
|
|
Wednesday Night
Sep 2
|
Mostly Clear
|
75°F |
3 mph
SSW
|
|
Thursday
Sep 3
|
Sunny
|
95°F |
5 mph
SSW
|
|
Thursday Night
Sep 3
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
74°F |
5 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Mason County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Mason County.
Largest mapped city population in this region: 2,945.
