Mason, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms then Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Mason, IL in one place.
A chance of showers and thunderstorms before 8am, then showers and thunderstorms between 8am and 3pm, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy. High near 81, with temperatures falling to around 79 in the afternoon. Southwest wind 2 to 6 mph. Chance of precipitation is 90%.
Local Weather Overview
This forecast page for Mason, 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 14, 2026 8:35 AM CDT.
The active forecast window currently covers Oct 14 to Oct 20, 2026 for Mason, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 14 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 8:35 AM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Mason
Thursday looks like the warmest upcoming period in Mason at 86 degrees F.
Saturday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Friday at about 20 mph NNW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 8:35 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- PAH
- Radar station
- KPAH
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 7pm, then a chance of showers and thunderstorms between 7pm and 8pm, then a slight chance of showers and thunderstorms between 8pm and midnight, then a chance of showers and thunderstorms between midnight and 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 67, with temperatures rising to around 69 overnight. East northeast wind around 1 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms between 9am and 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then a slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny. High near 86, with temperatures falling to around 84 in the afternoon. South southeast wind 2 to 10 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 54. West wind 5 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
A chance of rain showers before 7am. Partly sunny, with a high near 61. North northwest wind around 20 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Mostly clear, with a low around 42. North wind 7 to 17 mph, with gusts as high as 25 mph.
Sunny, with a high near 61. North northeast wind 3 to 7 mph.
Clear, with a low around 39. East wind around 3 mph.
Sunny, with a high near 67. South southeast wind 2 to 7 mph.
Mostly clear, with a low around 46. South southeast wind around 3 mph.
Mostly sunny, with a high near 69. South wind 2 to 6 mph.
Partly cloudy, with a low around 51. East southeast wind around 2 mph.
Mostly sunny, with a high near 74. Southeast wind 1 to 5 mph.
Partly cloudy, with a low around 54. East southeast wind around 3 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 14
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
81°F |
2 to 6 mph
SW
|
|
Tonight
Oct 14
|
Chance Showers And Thunderstorms
|
67°F |
1 mph
ENE
|
|
Thursday
Oct 15
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
86°F |
2 to 10 mph
SSE
|
|
Thursday Night
Oct 15
|
Chance Showers And Thunderstorms
|
54°F |
5 to 16 mph
W
|
|
Friday
Oct 16
|
Chance Rain Showers then Partly Sunny
|
61°F |
20 mph
NNW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
42°F |
7 to 17 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
61°F |
3 to 7 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear
|
39°F |
3 mph
E
|
|
Sunday
Oct 18
|
Sunny
|
67°F |
2 to 7 mph
SSE
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
46°F |
3 mph
SSE
|
|
Monday
Oct 19
|
Mostly Sunny
|
69°F |
2 to 6 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
51°F |
2 mph
ESE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
74°F |
1 to 5 mph
SE
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
54°F |
3 mph
ESE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mason.