Mason City, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Mason City, IL in one place.
Rain showers before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 75. South southeast wind around 8 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
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: Oct 13, 2026 11:31 PM CDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Mason City, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 11:31 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Mason City
Tuesday looks like the warmest upcoming period in Mason City at 76 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Friday at about 15 to 21 mph NNW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 11:31 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
Showers and thunderstorms before 1am. Mostly cloudy, with a low around 45. West northwest wind 9 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 60. North northwest wind 15 to 21 mph, with gusts as high as 36 mph.
Areas of frost after 5am. Mostly clear, with a low around 34. North wind 1 to 14 mph, with gusts as high as 23 mph.
Areas of frost before 8am. Sunny, with a high near 63.
Clear, with a low around 37.
Sunny, with a high near 69.
Partly cloudy, with a low around 45.
Partly sunny, with a high near 71.
Partly cloudy, with a low around 47.
Mostly sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
75°F |
8 mph
SSE
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms
|
45°F |
9 to 17 mph
WNW
|
|
Friday
Oct 16
|
Mostly Sunny
|
60°F |
15 to 21 mph
NNW
|
|
Friday Night
Oct 16
|
Mostly Clear then Areas Of Frost
|
34°F |
1 to 14 mph
N
|
|
Saturday
Oct 17
|
Areas Of Frost then Sunny
|
63°F |
0 to 5 mph
SE
|
|
Saturday Night
Oct 17
|
Clear
|
37°F |
5 mph
S
|
|
Sunday
Oct 18
|
Sunny
|
69°F |
5 to 10 mph
S
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
45°F |
5 to 8 mph
S
|
|
Monday
Oct 19
|
Partly Sunny
|
71°F |
6 mph
SSW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
47°F |
3 mph
SSE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
76°F |
2 to 6 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mason City.