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As of 02:30 CDT

Weather in Eureka, IL

41°Current weather

Eureka, Sunday, 18 October, 02:30

Clear. Feels like 36°. High 61°, low 39°.

Pressure30.45 inHg
Wind8.1 mph S
Humidity86%
Visibility6.2 mi
Dew point37°
Mon, 1965° / 42°0Clear
65 °Clear

Eureka, Monday, 19 October

Clear. High 65°, low 42°.

Pressure30.39 inHg
Wind3.3 mph S
Humidity52%
Visibility6.2 mi
Dew point44°
Tue, 2067° / 43°0Clear
67 °Clear

Eureka, Tuesday, 20 October

Clear. High 67°, low 43°.

Pressure30.39 inHg
Wind3.4 mph SE
Humidity44%
Visibility6.2 mi
Dew point42°
Wed, 2168° / 46°0Clear
68 °Clear

Eureka, Wednesday, 21 October

Clear. High 68°, low 46°.

Pressure30.27 inHg
Wind3.6 mph SW
Humidity54%
Visibility6.2 mi
Dew point47°
Thu, 2269° / 49°0Mostly clear
69 °Mostly clear

Eureka, Thursday, 22 October

Mostly clear. High 69°, low 49°.

Pressure30.27 inHg
Wind6.7 mph E
Humidity49%
Visibility—
Dew point46°
Fri, 2371° / 50°0Mostly clear
71 °Mostly clear

Eureka, Friday, 23 October

Mostly clear. High 71°, low 50°.

Pressure30.30 inHg
Wind9.6 mph SE
Humidity49%
Visibility—
Dew point46°
Sat, 2473° / 56°0Overcast
73 °Overcast

Eureka, Saturday, 24 October

Overcast. High 73°, low 56°.

Pressure30.21 inHg
Wind15.3 mph S
Humidity29%
Visibility—
Dew point36°
Sun, 2559° / 45°0Overcast
59 °Overcast

Eureka, Sunday, 25 October

Overcast. High 59°, low 45°.

Pressure30.42 inHg
Wind12.3 mph NW
Humidity57%
Visibility—
Dew point36°
Mon, 2656° / 38°0Overcast
56 °Overcast

Eureka, Monday, 26 October

Overcast. High 56°, low 38°.

Pressure30.42 inHg
Wind6.1 mph N
Humidity34%
Visibility—
Dew point25°
Tue, 2762° / 40°0Overcast
62 °Overcast

Eureka, Tuesday, 27 October

Overcast. High 62°, low 40°.

Pressure30.30 inHg
Wind9 mph S
Humidity29%
Visibility—
Dew point24°
Wed, 2866° / 52°0.03Light rain
66 °Light rain

Eureka, Wednesday, 28 October

Light rain. High 66°, low 52°.

Pressure30.09 inHg
Wind18.1 mph S
Humidity45%
Visibility—
Dew point43°
Thu, 2965° / 58°0.2Light rain
65 °Light rain

Eureka, Thursday, 29 October

Light rain. High 65°, low 58°.

Pressure29.83 inHg
Wind18.2 mph S
Humidity52%
Visibility—
Dew point46°
Fri, 3069° / 56°0.15Light rain
69 °Light rain

Eureka, Friday, 30 October

Light rain. High 69°, low 56°.

Pressure29.94 inHg
Wind13.9 mph SW
Humidity35%
Visibility—
Dew point38°
Sat, 3169° / 54°0.26Rain
69 °Rain

Eureka, Saturday, 31 October

Rain. High 69°, low 54°.

Pressure30.00 inHg
Wind16.2 mph SE
Humidity59%
Visibility—
Dew point52°
Sun, 0165° / 53°0.01Light rain
65 °Light rain

Eureka, Sunday, 1 November

Light rain. High 65°, low 53°.

Pressure29.88 inHg
Wind19.4 mph W
Humidity41%
Visibility—
Dew point40°
Mon, 0267° / 49°0Clear
67 °Clear

Eureka, Monday, 2 November

Clear. High 67°, low 49°.

Pressure30.09 inHg
Wind12.1 mph S
Humidity28%
Visibility—
Dew point31°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Eureka, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Eureka, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.