Mason, IL Weather Forecast
Local 7-day forecast
Partly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Mason, IL in one place.
Partly cloudy. Low around 64, with temperatures rising to around 66 overnight. East wind around 5 mph.
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: May 31, 2026 5:30 AM CDT.
The active forecast window currently covers May 31 to Jun 6, 2026 for Mason, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 31 to Jun 6, 2026
- Latest sync
- May 31, 2026 5:30 AM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Mason
Saturday looks like the warmest upcoming period in Mason at 85 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 10 mph NE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- May 31, 2026 5:30 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
Mostly sunny. High near 84, with temperatures falling to around 82 in the afternoon. East wind around 5 mph.
A chance of showers and thunderstorms between 9pm and 1am, then a slight chance of showers and thunderstorms between 4am and 5am, then showers and thunderstorms likely. Partly cloudy. Low around 65, with temperatures rising to around 67 overnight. East southeast wind around 3 mph. Chance of precipitation is 60%.
Showers and thunderstorms before 8am, then a chance of showers and thunderstorms between 8am and 9am, then showers and thunderstorms likely between 9am and noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. North wind 1 to 5 mph. Chance of precipitation is 80%.
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 63. Northeast wind around 5 mph. Chance of precipitation is 30%.
Sunny, with a high near 80. Northeast wind 5 to 10 mph.
Clear, with a low around 57. Northeast wind 3 to 8 mph.
Sunny, with a high near 80. East northeast wind around 7 mph.
Clear, with a low around 58. East southeast wind 1 to 5 mph.
Sunny, with a high near 82. South southeast wind 2 to 7 mph.
Mostly clear, with a low around 63. South wind around 6 mph.
Mostly sunny, with a high near 84. South southwest wind 3 to 10 mph, with gusts as high as 18 mph.
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 67. South wind 5 to 9 mph.
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 85. South wind 5 to 10 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
May 31
|
Partly Cloudy
|
64°F |
5 mph
E
|
|
Sunday
May 31
|
Mostly Sunny
|
84°F |
5 mph
E
|
|
Sunday Night
May 31
|
Chance Showers And Thunderstorms
|
65°F |
3 mph
ESE
|
|
Monday
Jun 1
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
84°F |
1 to 5 mph
N
|
|
Monday Night
Jun 1
|
Chance Showers And Thunderstorms
|
63°F |
5 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
80°F |
5 to 10 mph
NE
|
|
Tuesday Night
Jun 2
|
Clear
|
57°F |
3 to 8 mph
NE
|
|
Wednesday
Jun 3
|
Sunny
|
80°F |
7 mph
ENE
|
|
Wednesday Night
Jun 3
|
Clear
|
58°F |
1 to 5 mph
ESE
|
|
Thursday
Jun 4
|
Sunny
|
82°F |
2 to 7 mph
SSE
|
|
Thursday Night
Jun 4
|
Mostly Clear
|
63°F |
6 mph
S
|
|
Friday
Jun 5
|
Mostly Sunny
|
84°F |
3 to 10 mph
SSW
|
|
Friday Night
Jun 5
|
Slight Chance Showers And Thunderstorms
|
67°F |
5 to 9 mph
S
|
|
Saturday
Jun 6
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
85°F |
5 to 10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mason.