Sullivan, IL Weather Forecast
Local 7-day forecast
Partly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Sullivan, IL in one place.
Partly cloudy, with a low around 60. East northeast wind around 8 mph, with gusts as high as 17 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: May 29, 2026 2:37 AM CDT.
The active forecast window currently covers May 29 to Jun 4, 2026 for Sullivan, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 29 to Jun 4, 2026
- Latest sync
- May 29, 2026 2:37 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivan
Thursday looks like the warmest upcoming period in Sullivan at 81 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Saturday Night at about 10 mph E.
The forecast from May 29 through Jun 4 stays mostly dry.
Forecast Details
- Last updated
- May 29, 2026 2:37 AM 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 sunny, with a high near 79. East southeast wind around 9 mph.
Mostly cloudy, with a low around 60. East wind around 7 mph.
Partly sunny, with a high near 78. East northeast wind 6 to 9 mph.
Mostly cloudy, with a low around 57. East wind around 10 mph, with gusts as high as 16 mph.
Partly sunny, with a high near 77. East wind 5 to 8 mph.
Partly cloudy, with a low around 57. East wind around 5 mph.
Sunny, with a high near 80.
Mostly clear, with a low around 57.
Sunny, with a high near 79.
Mostly clear, with a low around 55.
Sunny, with a high near 78.
Mostly clear, with a low around 56.
Sunny, with a high near 81.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
May 29
|
Partly Cloudy
|
60°F |
8 mph
ENE
|
|
Friday
May 29
|
Mostly Sunny
|
79°F |
9 mph
ESE
|
|
Friday Night
May 29
|
Mostly Cloudy
|
60°F |
7 mph
E
|
|
Saturday
May 30
|
Partly Sunny
|
78°F |
6 to 9 mph
ENE
|
|
Saturday Night
May 30
|
Mostly Cloudy
|
57°F |
10 mph
E
|
|
Sunday
May 31
|
Partly Sunny
|
77°F |
5 to 8 mph
E
|
|
Sunday Night
May 31
|
Partly Cloudy
|
57°F |
5 mph
E
|
|
Monday
Jun 1
|
Sunny
|
80°F |
6 mph
NE
|
|
Monday Night
Jun 1
|
Mostly Clear
|
57°F |
5 mph
ENE
|
|
Tuesday
Jun 2
|
Sunny
|
79°F |
8 mph
ENE
|
|
Tuesday Night
Jun 2
|
Mostly Clear
|
55°F |
8 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
78°F |
8 mph
E
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
56°F |
7 mph
SE
|
|
Thursday
Jun 4
|
Sunny
|
81°F |
7 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sullivan.
