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As of 16:41 CDT

Weather in Eureka, IL

68°Current weather

Eureka, Wednesday, 14 October, 16:41

Overcast. Feels like 69°. High 69°, low 64°.

Pressure30.03 inHg
Wind10 mph NE
Humidity88%
Visibility6.2 mi
Dew point64°
Thu, 1570° / 61°0.4Rain
70 °Rain

Eureka, Thursday, 15 October

Rain. High 70°, low 61°.

Pressure29.97 inHg
Wind8.5 mph SE
Humidity93%
Visibility2.4 mi
Dew point64°
Fri, 1659° / 49°0.1Rain
59 °Rain

Eureka, Friday, 16 October

Rain. High 59°, low 49°.

Pressure30.12 inHg
Wind16.5 mph NW
Humidity68%
Visibility6.2 mi
Dew point42°
Sat, 1756° / 40°0Clear
56 °Clear

Eureka, Saturday, 17 October

Clear. High 56°, low 40°.

Pressure30.56 inHg
Wind2 mph N
Humidity49%
Visibility6.2 mi
Dew point33°
Sun, 1861° / 42°0Clear
61 °Clear

Eureka, Sunday, 18 October

Clear. High 61°, low 42°.

Pressure30.50 inHg
Wind8.9 mph S
Humidity48%
Visibility6.2 mi
Dew point37°
Mon, 1964° / 41°0Clear
64 °Clear

Eureka, Monday, 19 October

Clear. High 64°, low 41°.

Pressure30.42 inHg
Wind6.1 mph S
Humidity40%
Visibility—
Dew point35°
Tue, 2070° / 44°0Mostly clear
70 °Mostly clear

Eureka, Tuesday, 20 October

Mostly clear. High 70°, low 44°.

Pressure30.30 inHg
Wind7.2 mph E
Humidity49%
Visibility—
Dew point44°
Wed, 2175° / 56°0Clear
75 °Clear

Eureka, Wednesday, 21 October

Clear. High 75°, low 56°.

Pressure30.21 inHg
Wind12.3 mph S
Humidity47%
Visibility—
Dew point50°
Thu, 2268° / 64°0.13Light rain
68 °Light rain

Eureka, Thursday, 22 October

Light rain. High 68°, low 64°.

Pressure30.00 inHg
Wind18 mph SW
Humidity80%
Visibility—
Dew point59°
Fri, 2372° / 56°0Partly cloudy
72 °Partly cloudy

Eureka, Friday, 23 October

Partly cloudy. High 72°, low 56°.

Pressure30.09 inHg
Wind9.4 mph SE
Humidity65%
Visibility—
Dew point55°
Sat, 2474° / 52°0.01Light rain
74 °Light rain

Eureka, Saturday, 24 October

Light rain. High 74°, low 52°.

Pressure29.91 inHg
Wind17.7 mph SW
Humidity60%
Visibility—
Dew point57°
Sun, 2557° / 43°0Clear
57 °Clear

Eureka, Sunday, 25 October

Clear. High 57°, low 43°.

Pressure30.36 inHg
Wind12.7 mph NW
Humidity34%
Visibility—
Dew point27°
Mon, 2656° / 41°0Clear
56 °Clear

Eureka, Monday, 26 October

Clear. High 56°, low 41°.

Pressure30.39 inHg
Wind8.5 mph NW
Humidity33%
Visibility—
Dew point25°
Tue, 2759° / 42°0Overcast
59 °Overcast

Eureka, Tuesday, 27 October

Overcast. High 59°, low 42°.

Pressure30.27 inHg
Wind12 mph SW
Humidity31%
Visibility—
Dew point25°
Wed, 2855° / 48°0.08Light rain
55 °Light rain

Eureka, Wednesday, 28 October

Light rain. High 55°, low 48°.

Pressure30.06 inHg
Wind10.2 mph S
Humidity42%
Visibility—
Dew point31°
Thu, 2962° / 45°0Overcast
62 °Overcast

Eureka, Thursday, 29 October

Overcast. High 62°, low 45°.

Pressure30.03 inHg
Wind10.4 mph SW
Humidity60%
Visibility—
Dew point44°

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.