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As of 10:21 CDT

Weather in Eureka, IL

67°Current weather

Eureka, Wednesday, 14 October, 10:21

Overcast. Feels like 68°. High 76°, low 65°.

Pressure30.03 inHg
Wind6.1 mph N
Humidity94%
Visibility6.2 mi
Dew point65°
Thu, 1573° / 61°1.48Heavy rain
73 °Heavy rain

Eureka, Thursday, 15 October

Heavy rain. High 73°, low 61°.

Pressure29.94 inHg
Wind9.6 mph S
Humidity96%
Visibility1.8 mi
Dew point66°
Fri, 1661° / 47°0.03Light rain
61 °Light rain

Eureka, Friday, 16 October

Light rain. High 61°, low 47°.

Pressure30.12 inHg
Wind17.9 mph NW
Humidity62%
Visibility2.6 mi
Dew point40°
Sat, 1756° / 40°0Clear
56 °Clear

Eureka, Saturday, 17 October

Clear. High 56°, low 40°.

Pressure30.56 inHg
Wind1.3 mph N
Humidity47%
Visibility6.2 mi
Dew point30°
Sun, 1861° / 43°0Clear
61 °Clear

Eureka, Sunday, 18 October

Clear. High 61°, low 43°.

Pressure30.45 inHg
Wind10.9 mph S
Humidity41%
Visibility—
Dew point34°
Mon, 1965° / 43°0Overcast
65 °Overcast

Eureka, Monday, 19 October

Overcast. High 65°, low 43°.

Pressure30.39 inHg
Wind7.4 mph S
Humidity45%
Visibility—
Dew point39°
Tue, 2071° / 52°0Partly cloudy
71 °Partly cloudy

Eureka, Tuesday, 20 October

Partly cloudy. High 71°, low 52°.

Pressure30.27 inHg
Wind7.2 mph S
Humidity36%
Visibility—
Dew point39°
Wed, 2176° / 55°0Mostly clear
76 °Mostly clear

Eureka, Wednesday, 21 October

Mostly clear. High 76°, low 55°.

Pressure30.15 inHg
Wind11.1 mph S
Humidity48%
Visibility—
Dew point51°
Thu, 2268° / 56°0.46Rain
68 °Rain

Eureka, Thursday, 22 October

Rain. High 68°, low 56°.

Pressure30.03 inHg
Wind15.6 mph NE
Humidity93%
Visibility—
Dew point64°
Fri, 2367° / 51°0Overcast
67 °Overcast

Eureka, Friday, 23 October

Overcast. High 67°, low 51°.

Pressure30.15 inHg
Wind14 mph SE
Humidity75%
Visibility—
Dew point55°
Sat, 2472° / 53°0.02Light rain
72 °Light rain

Eureka, Saturday, 24 October

Light rain. High 72°, low 53°.

Pressure29.91 inHg
Wind22.2 mph SW
Humidity63%
Visibility—
Dew point58°
Sun, 2556° / 43°0Clear
56 °Clear

Eureka, Sunday, 25 October

Clear. High 56°, low 43°.

Pressure30.39 inHg
Wind15.5 mph NW
Humidity35%
Visibility—
Dew point26°
Mon, 2664° / 40°0Clear
64 °Clear

Eureka, Monday, 26 October

Clear. High 64°, low 40°.

Pressure30.18 inHg
Wind17.9 mph SW
Humidity31%
Visibility—
Dew point28°
Tue, 2765° / 44°0.03Light rain
65 °Light rain

Eureka, Tuesday, 27 October

Light rain. High 65°, low 44°.

Pressure30.03 inHg
Wind10.7 mph SW
Humidity35%
Visibility—
Dew point32°
Wed, 2865° / 50°0.28Light rain
65 °Light rain

Eureka, Wednesday, 28 October

Light rain. High 65°, low 50°.

Pressure29.74 inHg
Wind18.6 mph W
Humidity46%
Visibility—
Dew point42°
Thu, 2956° / 46°0.06Light rain
56 °Light rain

Eureka, Thursday, 29 October

Light rain. High 56°, low 46°.

Pressure30.09 inHg
Wind20.7 mph W
Humidity66%
Visibility—
Dew point42°

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.