Mason County, IL Weather Forecast
County weather hub
Mostly Cloudy
Compare major city weather across Mason County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly cloudy, with a high near 81. East wind 5 to 8 mph, with gusts as high as 17 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
- May 30 to Jun 3, 2026
- Latest sync
- May 28, 2026 6:50 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Mason County
Monday looks like the warmest upcoming period in Mason County at 85 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Saturday at about 5 to 8 mph E.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- May 28, 2026 6:50 PM CDT
- Coverage
- 5 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
Mostly cloudy, with a low around 59. East wind around 7 mph, with gusts as high as 17 mph.
Partly sunny, with a high near 81. East southeast wind around 7 mph, with gusts as high as 16 mph.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 58.
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 85.
Partly cloudy, with a low around 58.
Sunny, with a high near 84.
Mostly clear, with a low around 56.
Sunny, with a high near 83.
Mostly clear, with a low around 57.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Mostly Cloudy
|
81°F |
5 to 8 mph
E
|
|
Saturday Night
May 30
|
Mostly Cloudy
|
59°F |
7 mph
E
|
|
Sunday
May 31
|
Partly Sunny
|
81°F |
7 mph
ESE
|
|
Sunday Night
May 31
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
58°F |
3 mph
ESE
|
|
Monday
Jun 1
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
85°F |
5 mph
E
|
|
Monday Night
Jun 1
|
Partly Cloudy
|
58°F |
3 mph
ENE
|
|
Tuesday
Jun 2
|
Sunny
|
84°F |
7 mph
E
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
56°F |
6 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
83°F |
7 mph
SE
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
57°F |
5 mph
SE
|
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.
