Mason City, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Mason City, IL in one place.
Showers and thunderstorms likely. Mostly cloudy, with a high near 78.
Local Weather Overview
This forecast page for Mason City, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 9, 2026 7:28 PM CDT.
The active forecast window currently covers Apr 15, 2026 for Mason City, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15, 2026
- Latest sync
- Apr 9, 2026 7:28 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Mason City
Wednesday looks like the warmest upcoming period in Mason City at 78 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Wednesday at about 12 to 16 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 7:28 PM CDT
- Coverage
- 1 day
- 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
A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
78°F |
12 to 16 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
54°F |
8 to 12 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mason City.