Irwin, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Irwin, IL in one place.
A slight chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 101. West southwest wind around 0 mph. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Irwin, 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: Jul 15, 2026 4:44 AM CDT.
The active forecast window currently covers Jul 16 to Jul 21, 2026 for Irwin, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 16 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 4:44 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Irwin
Thursday looks like the warmest upcoming period in Irwin at 93 degrees F.
Saturday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Tuesday at about 10 to 15 mph NNW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 15, 2026 4:44 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
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 10pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 71. South southwest wind around 0 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 80%.
Showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 71.
A chance of showers and thunderstorms after 1pm. Sunny, with a high near 90.
A chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68.
Sunny, with a high near 87.
Mostly clear, with a low around 68.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.
A chance of showers and thunderstorms. Partly cloudy, with a low around 68.
A slight chance of showers and thunderstorms before 7am. Sunny, with a high near 84.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 16
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
93°F |
0 mph
|
|
Thursday Night
Jul 16
|
Chance Showers And Thunderstorms
|
71°F |
0 mph
|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
89°F |
0 to 5 mph
SW
|
|
Friday Night
Jul 17
|
Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
71°F |
5 mph
SW
|
|
Saturday
Jul 18
|
Sunny then Chance Showers And Thunderstorms
|
90°F |
5 to 10 mph
WSW
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
NW
|
|
Sunday
Jul 19
|
Sunny
|
87°F |
5 mph
NNW
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
68°F |
0 to 5 mph
SW
|
|
Monday
Jul 20
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
89°F |
5 to 10 mph
SW
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
WNW
|
|
Tuesday
Jul 21
|
Slight Chance Showers And Thunderstorms then Sunny
|
84°F |
10 to 15 mph
NNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Irwin.