Eureka, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Eureka, IL in one place.
Showers and thunderstorms likely. Cloudy, with a high near 72. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half 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: Oct 15, 2026 5:35 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Eureka, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 5:35 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Eureka
Wednesday looks like the warmest upcoming period in Eureka at 76 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Friday at about 18 to 22 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 5:35 PM 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
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 46. West wind 10 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
A chance of rain showers after 1pm. Partly sunny, with a high near 54. Northwest wind 18 to 22 mph, with gusts as high as 35 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Areas of frost after 4am. Partly cloudy, with a low around 34. North wind 7 to 20 mph, with gusts as high as 31 mph. New rainfall amounts less than a tenth of an inch possible.
Widespread frost before 9am. Sunny, with a high near 57. West northwest wind 2 to 6 mph.
Areas of frost after 5am. Clear, with a low around 36. South southwest wind 2 to 6 mph.
Areas of frost before 8am. Sunny, with a high near 66. South wind 6 to 12 mph, with gusts as high as 18 mph.
Mostly clear, with a low around 40.
Mostly sunny, with a high near 70.
Partly cloudy, with a low around 44.
Mostly sunny, with a high near 74.
Mostly clear, with a low around 47.
Sunny, with a high near 76.
Mostly clear, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Showers And Thunderstorms Likely
|
72°F |
10 mph
S
|
|
Tonight
Oct 15
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
46°F |
10 to 18 mph
W
|
|
Friday
Oct 16
|
Partly Sunny then Chance Rain Showers
|
54°F |
18 to 22 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy then Areas Of Frost
|
34°F |
7 to 20 mph
N
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
57°F |
2 to 6 mph
WNW
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
36°F |
2 to 6 mph
SSW
|
|
Sunday
Oct 18
|
Areas Of Frost then Sunny
|
66°F |
6 to 12 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
40°F |
7 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
70°F |
6 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
44°F |
3 mph
SSE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
74°F |
3 mph
SE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
47°F |
3 mph
E
|
|
Wednesday
Oct 21
|
Sunny
|
76°F |
2 to 6 mph
SE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
50°F |
5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Eureka.
