Allerton, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Allerton, IL in one place.
Showers and thunderstorms likely. Partly sunny. High near 62, with temperatures falling to around 54 in the afternoon. West wind around 20 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Local Weather Overview
This forecast page for Allerton, 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 7:48 PM CDT.
The active forecast window currently covers Apr 18 to Apr 22, 2026 for Allerton, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 7:48 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Allerton
Tuesday looks like the warmest upcoming period in Allerton at 76 degrees F.
Sunday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Tuesday at about 13 to 21 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 7:48 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 rain showers before 7pm, then patchy frost. Mostly clear, with a low around 37. West northwest wind 8 to 16 mph, with gusts as high as 24 mph. New rainfall amounts less than a tenth of an inch possible.
Patchy frost before 8am. Sunny, with a high near 57. West northwest wind 7 to 20 mph, with gusts as high as 29 mph.
Areas of frost after 3am. Mostly clear, with a low around 35.
Areas of frost before 8am. Sunny, with a high near 63.
Mostly clear, with a low around 48.
Mostly sunny, with a high near 76.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 76.
Partly cloudy, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Showers And Thunderstorms Likely
|
62°F |
20 mph
W
|
|
Saturday Night
Apr 18
|
Slight Chance Rain Showers then Patchy Frost
|
37°F |
8 to 16 mph
WNW
|
|
Sunday
Apr 19
|
Patchy Frost then Sunny
|
57°F |
7 to 20 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear then Areas Of Frost
|
35°F |
3 to 13 mph
NNE
|
|
Monday
Apr 20
|
Areas Of Frost then Sunny
|
63°F |
3 to 9 mph
SE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
48°F |
7 to 13 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
76°F |
13 to 21 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
55°F |
9 to 14 mph
SW
|
|
Wednesday
Apr 22
|
Mostly Sunny
|
76°F |
8 to 12 mph
SW
|
|
Wednesday Night
Apr 22
|
Partly Cloudy
|
52°F |
8 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Allerton.