Eureka, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Eureka, IL in one place.
A chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 82. South southeast wind 7 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Eureka, 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: Apr 15, 2026 3:24 PM CDT.
The active forecast window currently covers Apr 17 to Apr 21, 2026 for Eureka, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 17 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 3:24 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Eureka
Friday looks like the warmest upcoming period in Eureka at 82 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Friday at about 7 to 20 mph SSE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 3:24 PM CDT
- Coverage
- 5 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
Showers and thunderstorms. Mostly cloudy, with a low around 46. South southwest wind 15 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Showers and thunderstorms. Mostly sunny, with a high near 57. West northwest wind 15 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 36.
Sunny, with a high near 55.
Mostly clear, with a low around 36.
Sunny, with a high near 66.
Mostly clear, with a low around 50.
Mostly sunny, with a high near 73.
Partly cloudy, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
82°F |
7 to 20 mph
SSE
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms
|
46°F |
15 to 18 mph
SSW
|
|
Saturday
Apr 18
|
Showers And Thunderstorms
|
57°F |
15 to 20 mph
WNW
|
|
Saturday Night
Apr 18
|
Slight Chance Rain Showers then Partly Cloudy
|
36°F |
10 to 17 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
55°F |
10 to 17 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
36°F |
6 to 13 mph
NNE
|
|
Monday
Apr 20
|
Sunny
|
66°F |
6 to 13 mph
SSE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
50°F |
10 to 14 mph
SSW
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
73°F |
14 to 18 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
52°F |
10 to 14 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Eureka.
