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 93. Southwest wind around 12 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: Oct 12, 2026 5:15 PM CDT.
The active forecast window currently covers Oct 13 to Oct 18, 2026 for Sullivan, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 18, 2026
- Latest sync
- Oct 12, 2026 5:15 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sullivan
Tuesday looks like the warmest upcoming period in Sullivan at 93 degrees F.
Friday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Friday at about 17 to 21 mph NNW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 12, 2026 5:15 PM 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
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. Southwest wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a high near 81. West northwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 61. Northeast wind 3 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 77. Southeast wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 50. Chance of precipitation is 90%.
A slight chance of rain showers before 7am. Partly sunny, with a high near 62.
Mostly clear, with a low around 36.
Sunny, with a high near 61.
Clear, with a low around 36.
Sunny, with a high near 68.
Mostly clear, with a low around 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Sunny
|
93°F |
12 mph
SW
|
|
Tuesday Night
Oct 13
|
Partly Cloudy then Chance Showers And Thunderstorms
|
70°F |
6 mph
SW
|
|
Wednesday
Oct 14
|
Showers And Thunderstorms
|
81°F |
5 mph
WNW
|
|
Wednesday Night
Oct 14
|
Showers And Thunderstorms
|
61°F |
3 to 7 mph
NE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
77°F |
7 mph
SE
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms
|
50°F |
6 to 17 mph
W
|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Partly Sunny
|
62°F |
17 to 21 mph
NNW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
36°F |
6 to 15 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
61°F |
6 mph
NE
|
|
Saturday Night
Oct 17
|
Clear
|
36°F |
5 mph
SE
|
|
Sunday
Oct 18
|
Sunny
|
68°F |
5 to 9 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
44°F |
7 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sullivan.
