Mason County, IL Weather Forecast

County weather hub

77°

Chance Showers And Thunderstorms

Compare major city weather across Mason County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.

Wednesday, April 15, 2026

Wind: 12 to 15 mph SW

Wednesday

A chance of showers and thunderstorms. Partly sunny, with a high near 77.

County weather hub

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: Apr 15 to Apr 16, 2026
Latest sync: Apr 10, 2026 11:37 AM CDT
Forecast office: ILX
Source: NOAA / NWS

Next High

77°F

Wednesday

Next Low

56°F

Wednesday Night

Rain Outlook

Periods mentioning precipitation

Windiest

12 to 15 mph

Wednesday

Daily Outlook

Today

Apr 15

Chance Showers And Thunderstorms

77 °F

/ 56°F

Wind 12 to 15 mph

Thu

Apr 16

Chance Rain Showers

79 °F

/ 55°F

Wind 7 to 10 mph

This Week in Mason County

Thursday looks like the warmest upcoming period in Mason County at 79 degrees F.

Thursday Night is the coolest period ahead with temperatures near 55 degrees F.

The strongest winds are forecast for Wednesday at about 12 to 15 mph SW.

Precipitation is mentioned in 4 upcoming forecast periods.

Forecast Details

Last updated: Apr 10, 2026 11:37 AM CDT
Coverage: 2 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 source

Extended Forecast

Wednesday Night

Apr 15

56°F

Chance Showers And Thunderstorms

7 to 10 mph SW

A chance of showers and thunderstorms. Mostly cloudy, with a low around 56.

Thursday

Apr 16

79°F

Chance Rain Showers

7 to 10 mph SSW

A chance of rain showers. Mostly sunny, with a high near 79.

Thursday Night

Apr 16

55°F

Chance Rain Showers

8 mph SW

A chance of rain showers. Partly cloudy, with a low around 55.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Wednesday Apr 15	Chance Showers And Thunderstorms	77°F	12 to 15 mph SW	A chance of showers and thunderstorms. Partly sunny, with a high near 77.
Wednesday Night Apr 15	Chance Showers And Thunderstorms	56°F	7 to 10 mph SW	A chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Thursday Apr 16	Chance Rain Showers	79°F	7 to 10 mph SSW	A chance of rain showers. Mostly sunny, with a high near 79.
Thursday Night Apr 16	Chance Rain Showers	55°F	8 mph SW	A chance of rain showers. Partly cloudy, with a low around 55.

Major City Forecasts

Live forecast snapshots for major cities across Mason County.

Havana

Population 2,945

77°F

Showers And Thunderstorms Likely

Chance Showers And Thunderstorms

Overnight

12 mph

Coverage

Tracked cities

Coverage

100%

Forecast coverage currently spans 2 of 2 mapped cities in Mason County.

Largest mapped city population in this region: 2,945.

Region Links

Illinois weather

Statewide weather overview

United States weather

National weather entry point

Mason County Courthouse Havana image

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.