Sumner, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sumner, IL in one place.
Sunny, with a high near 88. Southeast wind around 5 mph.
Local Weather Overview
This forecast page for Sumner, 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: Aug 28, 2026 12:46 AM CDT.
The active forecast window currently covers Aug 29 to Sep 3, 2026 for Sumner, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 29 to Sep 3, 2026
- Latest sync
- Aug 28, 2026 12:46 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumner
Thursday looks like the warmest upcoming period in Sumner at 98 degrees F.
Saturday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Sunday at about 3 to 12 mph S.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Aug 28, 2026 12:46 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KVWX
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 66. South southeast wind around 3 mph.
Sunny, with a high near 93. South wind 3 to 12 mph, with gusts as high as 17 mph.
Mostly clear, with a low around 72. South wind 6 to 9 mph.
Sunny, with a high near 95.
Mostly clear, with a low around 75.
Sunny, with a high near 97.
Mostly clear, with a low around 76.
Sunny, with a high near 97.
Mostly clear, with a low around 76.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 98.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Sunny
|
88°F |
5 mph
SE
|
|
Saturday Night
Aug 29
|
Mostly Clear
|
66°F |
3 mph
SSE
|
|
Sunday
Aug 30
|
Sunny
|
93°F |
3 to 12 mph
S
|
|
Sunday Night
Aug 30
|
Mostly Clear
|
72°F |
6 to 9 mph
S
|
|
Monday
Aug 31
|
Sunny
|
95°F |
7 to 12 mph
SSW
|
|
Monday Night
Aug 31
|
Mostly Clear
|
75°F |
6 to 10 mph
S
|
|
Tuesday
Sep 1
|
Sunny
|
97°F |
6 to 9 mph
SW
|
|
Tuesday Night
Sep 1
|
Mostly Clear
|
76°F |
8 mph
SSW
|
|
Wednesday
Sep 2
|
Sunny
|
97°F |
5 to 9 mph
SW
|
|
Wednesday Night
Sep 2
|
Mostly Clear
|
76°F |
7 mph
SSW
|
|
Thursday
Sep 3
|
Sunny then Slight Chance Showers And Thunderstorms
|
98°F |
5 to 9 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumner.