Sullivan, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sullivan, IL in one place.
Sunny, with a high near 89. Northeast wind around 6 mph.
Local Weather Overview
This forecast page for Sullivan, 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: Jul 13, 2026 4:15 AM CDT.
The active forecast window currently covers Jul 14 to Jul 19, 2026 for Sullivan, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 19, 2026
- Latest sync
- Jul 13, 2026 4:15 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivan
Wednesday looks like the warmest upcoming period in Sullivan at 91 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Saturday at about 10 mph WSW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 13, 2026 4:15 AM CDT
- Coverage
- 6 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
Clear, with a low around 68. Northeast wind 0 to 5 mph.
Sunny, with a high near 91. North wind around 2 mph.
Clear, with a low around 70. West southwest wind around 2 mph.
Sunny, with a high near 90.
Mostly clear, with a low around 71.
Sunny, with a high near 90.
Mostly clear, with a low around 72.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 90.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 70.
A slight chance of showers and thunderstorms between 7am and 1pm. Sunny, with a high near 88.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
89°F |
6 mph
NE
|
|
Tuesday Night
Jul 14
|
Clear
|
68°F |
0 to 5 mph
NE
|
|
Wednesday
Jul 15
|
Sunny
|
91°F |
2 mph
N
|
|
Wednesday Night
Jul 15
|
Clear
|
70°F |
2 mph
WSW
|
|
Thursday
Jul 16
|
Sunny
|
90°F |
5 mph
W
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
71°F |
3 mph
SSW
|
|
Friday
Jul 17
|
Sunny
|
90°F |
5 to 8 mph
SW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
72°F |
7 mph
SW
|
|
Saturday
Jul 18
|
Sunny then Slight Chance Showers And Thunderstorms
|
90°F |
10 mph
WSW
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
70°F |
9 mph
SW
|
|
Sunday
Jul 19
|
Slight Chance Showers And Thunderstorms
|
88°F |
10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sullivan.
