Allen, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Allen, IL in one place.
Sunny, with a high near 82. West northwest wind around 5 mph.
Local Weather Overview
This forecast page for Allen, 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 8, 2026 6:40 PM CDT.
The active forecast window currently covers Oct 8 to Oct 14, 2026 for Allen, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 8 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 6:40 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Allen
Columbus Day looks like the warmest upcoming period in Allen at 86 degrees F.
Tonight is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Columbus Day at about 3 to 10 mph SSW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 6:40 PM CDT
- Coverage
- 7 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
Mostly clear, with a low around 54. East wind around 3 mph.
A slight chance of rain showers between 7am and noon. Mostly sunny, with a high near 85. South southeast wind 5 to 9 mph, with gusts as high as 17 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Clear, with a low around 61. South southeast wind around 9 mph, with gusts as high as 20 mph.
Mostly sunny, with a high near 84. South southeast wind around 9 mph, with gusts as high as 16 mph.
Mostly cloudy, with a low around 59. Southeast wind 5 to 8 mph.
Mostly sunny, with a high near 78. Northeast wind around 3 mph.
Mostly clear, with a low around 58.
Sunny, with a high near 86.
Mostly clear, with a low around 63.
A slight chance of rain showers after 1pm. Sunny, with a high near 79.
A chance of rain showers. Partly cloudy, with a low around 54.
A chance of rain showers. Partly sunny, with a high near 76.
A chance of rain showers. Mostly cloudy, with a low around 57.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 8
|
Sunny
|
82°F |
5 mph
WNW
|
|
Tonight
Oct 8
|
Mostly Clear
|
54°F |
3 mph
E
|
|
Friday
Oct 9
|
Slight Chance Rain Showers then Mostly Sunny
|
85°F |
5 to 9 mph
SSE
|
|
Friday Night
Oct 9
|
Clear
|
61°F |
9 mph
SSE
|
|
Saturday
Oct 10
|
Mostly Sunny
|
84°F |
9 mph
SSE
|
|
Saturday Night
Oct 10
|
Mostly Cloudy
|
59°F |
5 to 8 mph
SE
|
|
Sunday
Oct 11
|
Mostly Sunny
|
78°F |
3 mph
NE
|
|
Sunday Night
Oct 11
|
Mostly Clear
|
58°F |
2 mph
SE
|
|
Columbus Day
Oct 12
|
Sunny
|
86°F |
3 to 10 mph
SSW
|
|
Monday Night
Oct 12
|
Mostly Clear
|
63°F |
9 mph
SW
|
|
Tuesday
Oct 13
|
Sunny then Slight Chance Rain Showers
|
79°F |
9 mph
NW
|
|
Tuesday Night
Oct 13
|
Chance Rain Showers
|
54°F |
7 mph
NE
|
|
Wednesday
Oct 14
|
Chance Rain Showers
|
76°F |
6 to 9 mph
E
|
|
Wednesday Night
Oct 14
|
Chance Rain Showers
|
57°F |
10 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Allen.