Collison, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Collison, IL in one place.
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 91. West wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Collison, 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: Sep 15, 2026 1:40 PM CDT.
The active forecast window currently covers Sep 17 to Sep 21, 2026 for Collison, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 1:40 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Collison
Thursday looks like the warmest upcoming period in Collison at 91 degrees F.
Monday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Monday at about 8 to 13 mph NNE.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 1:40 PM CDT
- Coverage
- 5 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
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 67. North northeast wind around 5 mph.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. East northeast wind around 6 mph.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 89.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 67.
A chance of showers and thunderstorms. Partly sunny, with a high near 80.
A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
A slight chance of showers and thunderstorms. Partly sunny, with a high near 75.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 55.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Chance Showers And Thunderstorms
|
91°F |
5 mph
W
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms
|
67°F |
5 mph
NNE
|
|
Friday
Sep 18
|
Slight Chance Showers And Thunderstorms
|
86°F |
6 mph
ENE
|
|
Friday Night
Sep 18
|
Slight Chance Showers And Thunderstorms
|
66°F |
7 mph
ESE
|
|
Saturday
Sep 19
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
89°F |
8 to 12 mph
SSW
|
|
Saturday Night
Sep 19
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
67°F |
7 mph
SW
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
80°F |
5 to 10 mph
NNW
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
59°F |
7 to 10 mph
NNE
|
|
Monday
Sep 21
|
Slight Chance Showers And Thunderstorms
|
75°F |
8 to 13 mph
NNE
|
|
Monday Night
Sep 21
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
55°F |
6 to 13 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Collison.