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 93. Southwest wind 8 to 12 mph, with gusts as high as 18 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: Oct 12, 2026 4:44 AM CDT.
The active forecast window currently covers Oct 13 to Oct 18, 2026 for Sumner, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 18, 2026
- Latest sync
- Oct 12, 2026 4:44 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumner
Tuesday looks like the warmest upcoming period in Sumner at 93 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Friday at about 18 to 22 mph NNW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 12, 2026 4:44 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
A slight chance of rain showers between 1am and 4am, then a slight chance of showers and thunderstorms. Mostly clear, with a low around 71. South southwest wind 6 to 9 mph. New rainfall amounts less than a tenth of an inch possible.
A slight chance of showers and thunderstorms before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 84. West southwest wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 65. North northeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Rain showers likely before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 7am. Partly sunny, with a high near 64.
Mostly clear, with a low around 38.
Sunny, with a high near 60.
Clear, with a low around 36.
Sunny, with a high near 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Sunny
|
93°F |
8 to 12 mph
SW
|
|
Tuesday Night
Oct 13
|
Mostly Clear then Slight Chance Showers And Thunderstorms
|
71°F |
6 to 9 mph
SSW
|
|
Wednesday
Oct 14
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms
|
84°F |
7 mph
WSW
|
|
Wednesday Night
Oct 14
|
Showers And Thunderstorms
|
65°F |
5 mph
NNE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms Likely
|
82°F |
5 to 12 mph
S
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
55°F |
9 to 17 mph
W
|
|
Friday
Oct 16
|
Chance Showers And Thunderstorms then Partly Sunny
|
64°F |
18 to 22 mph
NNW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
38°F |
9 to 20 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
60°F |
6 to 9 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear
|
36°F |
5 mph
E
|
|
Sunday
Oct 18
|
Sunny
|
67°F |
3 to 8 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumner.