Irwin, IL Weather Forecast
Local 7-day forecast
Patchy Fog then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Irwin, IL in one place.
Patchy fog before 8am. Mostly sunny, with a high near 83. South southeast wind 5 to 20 mph, with gusts as high as 30 mph.
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: Apr 16, 2026 1:10 PM CDT.
The active forecast window currently covers Apr 17 to Apr 22, 2026 for Irwin, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 17 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 1:10 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Irwin
Friday looks like the warmest upcoming period in Irwin at 83 degrees F.
Sunday Night is the coolest period ahead with temperatures near 32 degrees F.
The strongest winds are forecast for Friday at about 5 to 20 mph SSE.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 1:10 PM 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
Showers and thunderstorms likely between 7pm and 10pm, then showers and thunderstorms. Mostly cloudy, with a low around 48. South southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Rain showers before 1pm. Partly sunny, with a high near 58. West northwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Mostly clear, with a low around 35.
Sunny, with a high near 54.
Areas of frost after 2am. Mostly clear, with a low around 32.
Areas of frost before 9am. Sunny, with a high near 61.
Partly cloudy, with a low around 48.
Mostly sunny, with a high near 75.
Partly cloudy, with a low around 53.
Sunny, with a high near 75.
Mostly clear, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 17
|
Patchy Fog then Mostly Sunny
|
83°F |
5 to 20 mph
SSE
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms Likely then Showers And Thunderstorms
|
48°F |
15 to 20 mph
SSW
|
|
Saturday
Apr 18
|
Rain Showers
|
58°F |
15 mph
WNW
|
|
Saturday Night
Apr 18
|
Mostly Clear
|
35°F |
10 to 15 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
54°F |
10 to 15 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear then Areas Of Frost
|
32°F |
5 to 10 mph
N
|
|
Monday
Apr 20
|
Areas Of Frost then Sunny
|
61°F |
5 to 10 mph
SE
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
48°F |
10 to 15 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
75°F |
15 to 20 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
53°F |
10 to 15 mph
WSW
|
|
Wednesday
Apr 22
|
Sunny
|
75°F |
10 mph
N
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
50°F |
5 to 10 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Irwin.